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Fumio Narita

Section

Graduate School of Environmental Studies

Job title

Professor

Degree

博士（工学）（東北大学）
修士（工学）（東北大学）

researchmap

https://researchmap.jp/read0191486

J-GLOBAL ID

200901012391831358

Research History 3

1999/04 - Present

Tohoku University
1998/04 - 1999/03

株式会社トーキン
1997/04 - 1998/03

Tohoku University

Education 3

Tohoku University

1995/04 - 1998/03
Tohoku University　Graduate School of Engineering

1993/04 - 1995/05
Tohoku University　Faculty of Engineering

1989/04 - 1993/03

Committee Memberships 21

日本機械学会　機能材料と構造の力学研究会主査

2023/04 - Present
日本複合材料学会　東北・北海道支部長

2022/04 - Present
日本複合材料学会　マルチファンクショナル研究会主査

2020/04 - Present
日本複合材料学会　代議員

2020/04 - 2022/03
日本複合材料学会　東北・北海道副支部長

2019/04 - 2021/03
日本機械学会　日本機械学会論文集／Transactions of the JSME (in Japanese), Mechanical Engineering Journal, Mechanical Engineering Letters アソシエイトエディタ

2018/04 - 2021/03
The 5th JSME/ASME International Conference on Materials and Processing 2014 (ICM&P 2014)　Scientific Committee

2013/04 - 2014/06
日本機械学会 2013年度（第91期）材料力学部門部門賞担当委員会　委員

2013/04 - 2014/03
日本機械学会 2013年度（第91期）校閲委員　委員

2013/04 - 2014/03
日本機械学会 2012年度（第90期）校閲委員　委員

2012/04 - 2013/03
日本機械学会 2012年度（第90期）材料力学部門第9技術委員会　委員長

2012/04 - 2013/03
日本機械学会 2010年度（第88期）　校閲委員

2010/04 - 2011/03
日本機械学会第87期（2009年4月－2010年3月）材料力学部門第４技術委員会（若手シンポジウム）　委員

2009/04 - 2010/03
日本機械学会 2009年度（第87期）　校閲委員

2009/04 - 2010/03
2010 M&M International Symposium for Young Researcher　International Organizing committee

2009/04 - 2010/03
日本機械学会第８２期(平成１６年４月～平成１７年３月) 材料力学部門, 第４技術委員会（若手シンポジウム）　委員

2004/04 - 2005/03
傾斜機能材料研究会　第32回新構造・機能制御と傾斜機能材料シンポジウム実行委員長

2023/09 -
日本複合材料学会　第48回複合材料シンポジウム実行委員長

2023/09 -
第24回MAGDAコンファレンス in Tohoku －電磁現象及び電磁力に関するコンファレンス－　実行委員

2015/11 -
第26回新構造・機能制御と傾斜機能材料シンポジウム　実行委員

2015/09 -
日本機械学会 M&M2008特集号英文ジャーナルJSMME 編修委員　編修委員

2008/07 -

Show all ︎Show first 5

Professional Memberships 4

日本複合材料学会
傾斜機能材料研究会
The Japan Society of Mechanical Engineers
日本金属学会

Research Interests 3

Design of Smart Materials and Structures
Numerical Fracture Mechanics
Electrothermoelasticity

Research Areas 3

Nanotechnology/Materials / Structural and functional materials / Structural and Functional Materials
Nanotechnology/Materials / Material fabrication and microstructure control / Metallurgy and Material Processing
Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Machine materials and mechanics / Materials for Mechanics and Strength of Materials

Awards 5

第8回「ジャパン・レジリエンス・アワード（強靱化大賞）」「STOP感染症大賞」金賞

2022/04　一般社団法人レジリエンスジャパン推進協議会
防災・減災×サステナブル大賞2022防災・減災×ＳＤＧｓ賞アカデミー&ジュニアアカデミー部門グローバル賞

2022/03　一般社団法人減災サステナブル技術協会
第72回功績賞「力学特性部門」

2014/03/21　日本金属学会
みやぎ産業科学振興基金研究奨励賞

2005/05/31　みやぎ産業科学振興基金　知能電子デバイス設計のための圧電材料システムの電気破壊・メゾ力学特性評価
第43回原田研究奨励賞

2003/10/31　財団法人金属研究助成会　圧電デバイス設計のための電気破壊・変形特性評価に関する研究

Papers 397

Self-powered multilayer impact sensor consisting of CFRP integrated with soft and hard piezoelectric layers

Ziwen Zhao, Longfei He, Zhengxiao Lin, Zhenjin Wang, Hiroki Kurita, Yu Shi, Fumio Narita

Composites Part B: Engineering　304　112683-112683　2025/09
Publisher: Elsevier BV
DOI： 10.1016/j.compositesb.2025.112683 　

ISSN： 1359-8368
Inverse magnetostrictive properties of twisted Fe–Co alloy wire Peer-reviewed

Hiroki Kurita, Zhenjin Wang, Fumio Narita

Mechanics Research Communications　148　104467-104467　2025/09
Publisher: Elsevier BV
DOI： 10.1016/j.mechrescom.2025.104467 　

ISSN： 0093-6413
Morphology Transformation of Cellulose Nanofiber in Titanium during Consolidation Process Peer-reviewed

Hiroki Kurita, Yibin Yin, Fumio Narita

MATERIALS TRANSACTIONS　66　(7)　903-906　2025/07/01
Publisher: Japan Institute of Metals
DOI： 10.2320/matertrans.mt-m2024184 　

ISSN： 1345-9678

eISSN： 1347-5320
Experimental study on high-precision detection technology for the freezing front height in brine on a horizontal cold plate surface in cold regions Peer-reviewed

Han Shi, Mengjie Song, Fumio Narita, Seyyed Hossein Hosseini, Long Zhang, Christopher Yu Hang Chao

Renewable Energy　246　122928-122928　2025/06
Publisher: Elsevier BV
DOI： 10.1016/j.renene.2025.122928 　

ISSN： 0960-1481
Improvement of mechanical strength of piezoelectric ceramics embedded in aluminum matrix

Tetsuro Yanaseko, Hiroshi Sato, Fumio Narita, Hiroshi Asanuma

Journal of the American Ceramic Society　2025/03/27
Publisher: Wiley
DOI： 10.1111/jace.20514 　

ISSN： 0002-7820

eISSN： 1551-2916

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Abstract Piezoelectric ceramics were integrated into an aluminum matrix to enhance their strength. The strength, obtained via a three‐point bending test conducted both pre‐ and postembedding the piezoelectric ceramics, was analyzed using a Weibull distribution. The analysis aimed to provide a quantitative assessment of the strength augmentation. The Weibull modulus increased from 4.30 to 5.96, while the scale parameter rose from 125.1 to 167.8 MPa. Notably, a distinct inflection point emerged in the Weibull plot of the composite piezoelectric ceramics, indicating a shift in the fracture mode. This transition in fracture mode is attributed to matrix yielding, a conjecture supported by the Weibull modulus aligning with the Weibull modulus of strength at the yield. The microstructures of the composites emerged as pivotal factors that influenced the fracture mode transition. Microstructural defects at the interface contributed to reducing the interfacial strength, which induced differences in fracture modes.
Aptamer-based biosensors for wastewater surveillance of influenza virus, SARS-CoV-2, and norovirus: A comprehensive review Peer-reviewed

Yilei Wang, Mohan Amarasiri, Wakana Oishi, Masayasu Kuwahara, Yuka Kataoka, Hiroki Kurita, Fumio Narita, Rong Chen, Qian Li, Daisuke Sano

Water Research　279　123484-123484　2025/03
Publisher: Elsevier BV
DOI： 10.1016/j.watres.2025.123484 　

ISSN： 0043-1354
Piezoelectric flutter energy harvesting: absolute nodal coordinate formulation model and wind tunnel experiment

Taisei Mukogawa, Kento Shimura, Shuonan Dong, Koji Fujita, Hiroki Nagai, Masaki Kameyama, Yu Shi, Yu Jia, Constantinos Soutis, Hiroki Kurita, Fumio Narita, Yushin Hara, Kanjuro Makihara, Keisuke Otsuka

Mechanics Research Communications　143　104351-104351　2024/11
Publisher: Elsevier BV
DOI： 10.1016/j.mechrescom.2024.104351 　

ISSN： 0093-6413
Transforming Tree BarkWaste into a Green Composite: Mechanical Properties and Biodegradability Invited Peer-reviewed

Lovisa Rova, Juson Kokubo, Zhenjin Wang, Hiroki Kurita, Fumio Narita

Journal of Composites Science　8　465　2024/11
Fatigue characterization of cellulose nanofiber–reinforced silk yarns for enhanced structural applications

Maëlle Richard, Zhenjin Wang, Hiroki Kurita, Fumio Narita

Composites Science and Technology　257　110793-110793　2024/10
Publisher: Elsevier BV
DOI： 10.1016/j.compscitech.2024.110793 　

ISSN： 0266-3538
Structural optimization of PVDF cellular resonators for energy-harvesting enhancement based on backpropagation neural network and NSGA-II algorithm Peer-reviewed

Longfei He, Hiroki Kurita, Zhenjin Wang, Fumio Narita

Sensors and Actuators A: Physical　376　115608-115608　2024/10
Publisher: Elsevier BV
DOI： 10.1016/j.sna.2024.115608 　

ISSN： 0924-4247
On the use of cellulose acetate as a structural material for parts produced by fused filament fabrication Peer-reviewed

Alia Gallet--Pandellé, Renaud G. Rinaldi, Florent Dalmas, Hiroki Kurita, Fumio Narita

Cellulose　31　(15)　9265-9279　2024/09/09
Publisher: Springer Science and Business Media LLC
DOI： 10.1007/s10570-024-06092-4 　

ISSN： 0969-0239

eISSN： 1572-882X
Thick piezoelectric films by aerosol deposition at room temperature: corona poling and force sensing

Kohei Maruyama, Yoshihiro Kawakami, Fumio Narita

Japanese Journal of Applied Physics　63　(9)　09SP22-09SP22　2024/09/02
Publisher: IOP Publishing
DOI： 10.35848/1347-4065/ad6e96 　

ISSN： 0021-4922

eISSN： 1347-4065

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Abstract In this study, we employed corona poling to improve the piezoelectric properties of as-deposited BaTiO₃ films and conducted a vibration energy harvesting test. Dielectric measurements indicated that the dielectric constant of the as-deposited film increased with temperature, and the frequency dependence of the dielectric constant was minimal at room temperature. Applying an electric field of 1500 kV cm⁻¹ resulted in a recoverable energy density of 7.1 J cm⁻³ and an energy storage efficiency of 54%. The corona polarization treatment could align dipoles under high electric fields and prevent dielectric breakdown owing to local defects created by the aerosol deposition (AD) process. The vibration test yielded a harvested energy of 172 nJ and an output voltage of 2.67 V, which is suitable for force sensor applications. Polarization via corona discharge is also feasible without an electrode. Integrating AD with corona poling may benefit new capacitors, sensors, and energy harvesting technologies.
An amorphous Cr₂Ge₂Te₆/polyimide double-layer foil with an extraordinarily outstanding strain sensing ability Peer-reviewed

Yinli Wang, Yi Shuang, Mihyeon Kim, Daisuke Ando, Fumio Narita, Yuji Sutou

Materials Horizons　11　(22)　5631-5640　2024/09
Publisher: Royal Society of Chemistry (RSC)
DOI： 10.1039/d4mh00616j 　

ISSN： 2051-6347

eISSN： 2051-6355
Japanese washi-paper-based green composites: Fabrication, mechanical characterization, and evaluation of biodegradability Peer-reviewed

Lovisa Rova, Alia Gallet--Pandellé, Zhenjin Wang, Hiroki Kurita, Fumio Narita

Composites Part A: Applied Science and Manufacturing　184　108261-108261　2024/09
Publisher: Elsevier BV
DOI： 10.1016/j.compositesa.2024.108261 　

ISSN： 1359-835X
Prediction of internal stress in alumina laminates induced by shrinkage mismatch based on elastic model modification Peer-reviewed

Teruyoshi Kanno, Arisa Sakatani, Hiroki Kurita, Fumio Narita

Journal of the American Ceramic Society　107　(11)　7201-7211　2024/07/23
Publisher: Wiley
DOI： 10.1111/jace.20041 　

ISSN： 0002-7820

eISSN： 1551-2916

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Abstract Cracks induced by internal stresses compromise the structural integrity of ceramic laminates. Such stresses can be classified into thermal stress derived from thermal expansion mismatch and shrinkage stress derived from shrinkage mismatch. Analytical models have been proposed for the former, whereas only numerical predictions have been explored for the latter. In this study, an equation is constructed to predict the shrinkage stress by modifying an elastic solution proposed in previous studies. We fabricated laminates with three‐layer sandwiched structures using only alumina specimens with high and low densities to control the shrinkage and avoid thermal mismatch. Surface cracks were initiated when the shrinkage stress exceeded the flexural strength of the surface layer. Although the original strength of the surface layer was 308.8 MPa, the laminates’ flexural strength was lower than that because of shrinkage constraint. Our results demonstrate that the shrinkage stress was successfully estimated analytically using a few material properties measured in an ordinary environment. This study will ensure the structural integrity of ceramic laminates in laminate designs.
Mechanical Properties of Twisted Cellulose Nanofiber-Reinforced Silk Yarns Peer-reviewed

Maëlle Richard, Genki Kobayashi, Zhenjin Wang, Hiroki Kurita, Fumio Narita

ACS Biomaterials Science & Engineering　10　(7)　4237-4244　2024/06/10
Publisher: American Chemical Society (ACS)
DOI： 10.1021/acsbiomaterials.4c00071 　

ISSN： 2373-9878

eISSN： 2373-9878
Enhanced mechanical qualities of sericin-removed silk by direct feeding of silkworms with cellulose nanofiber Peer-reviewed

Genki Kobayashi, Hiroki Kurita, Atsuhiko Nagasawa, Masatoshi Hori, Fumio Narita

Journal of Applied Polymer Science　141　e55512　2024/04
Screen-printed piezoelectric composites for vibrational energy harvesting in combination with structural composite laminates for powering a sensing node Peer-reviewed

Boyue Chen, Yu Jia, Fumio Narita, Hiroki Kurita, Yu Shi

Composites Part B: Engineering　273　111274-111274　2024/03
Publisher: Elsevier BV
DOI： 10.1016/j.compositesb.2024.111274 　

ISSN： 1359-8368
Multimode auxetic piezoelectric energy harvester for low-frequency vibration Peer-reviewed

Longfei He, Hiroki Kurita, Fumio Narita

Smart Materials and Structures　33　035020　2024/02/02
Publisher: IOP Publishing
DOI： 10.1088/1361-665x/ad254f 　

ISSN： 0964-1726

eISSN： 1361-665X

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Abstract Herein, we propose a piezoelectric energy harvester (PEH) capable of vibrating in multi-degrees-of-freedom. The resonant frequency, working bandwidth, and output power of the PEH were improved by introducing an auxetic structure (AS). The proposed PEH exhibited a symmetric serpentine structure with a doubly clamped configuration comprising several proof masses at the junctions. Finite element method simulation was conducted to investigate the characteristics of an AS PEH and a plain-structure PEH. Prototypes of the PEHs were manufactured by three-dimensional printing technology, and their performance was evaluated through vibrational energy-harvesting experimental tests. The results showed that introducing the AS reduced the first and second resonant frequencies by 49% and 44%, respectively, considerably improved the output power in the first mode (up to 2548%) and narrowed the frequency bandgap between the first two resonance modes by 29%. The proposed multimode AS PEH can operate in a low-frequency environment of less than 20 Hz. Finally, we discussed several ways of optimizing the AS. It has been found that the PEH performance could be further improved by selecting a reasonable thickness for the AS, increasing the number of periodic unit cells, and using an AS with a variable cross-section unit cell.&#xD;
Monitoring of Allowable Bending Stress Overload in Glass‐Fiber‐Reinforced Polymer Composites Using Magnetostrictive Fe–Co Fibers Peer-reviewed

Kenichi Katabira, Hiroki Kurita, Kotaro Mori, Hitoshi Tamura, Fumio Narita

Advanced Engineering Materials　26　(4)　2300529　2024/02/01
Publisher: Wiley
DOI： 10.1002/adem.202300529 　

ISSN： 1438-1656

eISSN： 1527-2648

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For the safe operation of glass‐fiber‐reinforced polymer (GFRP) laminates, evaluating the applied stress and the health of composite structures is crucial. Magnetostrictive materials are functional materials that can be applied to structural health monitoring as sensor materials. Herein, a method for detecting whether the maximum stress of GFRP laminates under bending exceeds the allowable stress using magnetostrictive fibers is proposed. First, magnetostrictive Fe–Co alloy fibers are embedded in GFRP laminates. Then, four‐point bending tests are conducted. Magnetomechanical coupled modeling based on the composite beam theory is then applied to the experimental results. The effects of the position of Fe–Co fibers on the magnetostrictive behavior and mechanical properties of the prepared composites are evaluated. A concept for monitoring the relationship between the maximum bending stress and the allowable stress of the composite materials is proposed.
Effect of carbon black addition on electromechanical performance of flexible piezoelectric composite films Peer-reviewed

Ziwen Zhao, Yaonan Yu, Longfei He, Zhenjin Wang, Hiroki Kurita, Fumio Narita

Composites Part A: Applied Science and Manufacturing　180　108103-108103　2024/02
Publisher: Elsevier BV
DOI： 10.1016/j.compositesa.2024.108103 　

ISSN： 1359-835X
Novel process for monitoring stress in carbon fiber reinforced polymer composites using magnetostrictive wires from cryogenic to high temperatures

Kenichi Katabira, Ryosuke Komagome, Fumio Narita

Mechanics of Advanced Materials and Structures　31　(3)　586-594　2024/02/01
Publisher: Informa UK Limited
DOI： 10.1080/15376494.2022.2116755 　

ISSN： 1537-6494

eISSN： 1537-6532
Local impact sensing via flexible piezoelectric composite film based on highly elastic resin Peer-reviewed

Ziwen Zhao, Zhenjin Wang, Longfei He, Hiroshi Yokota, Yutaka Okada, Fumio Narita

Sensors and Actuators A: Physical　368　115089-115089　2024/02
Publisher: Elsevier BV
DOI： 10.1016/j.sna.2024.115089 　

ISSN： 0924-4247
Measurement of Magnetic Flux Density Changes in Mode I Interlaminar Fracture in Magnetostrictive Fiber–Embedded Glass Fiber-Reinforced Polymer Composites Invited Peer-reviewed

Tomoki Miyashita, Kenichi Katabira, Hiroki Kurita, Fumio Narita

Journal of Composites Science　8　8　2024
Fabrication, Evaluation, and Multiscale Simulation of Piezoelectric Composites Reinforced Using Unidirectional Carbon Fibers for Flexible Motion Sensors Peer-reviewed

Yaonan Yu, Chao Luo, Takayuki Suto, Yasutomo Uetsuji, Fumio Narita

Small　20　(24)　2307689　2023/12/14
Publisher: Wiley
DOI： 10.1002/smll.202307689 　

ISSN： 1613-6810

eISSN： 1613-6829

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Abstract Piezoelectric composite materials can convert mechanical energy into electrical energy, thus promoting battery‐free motion‐sensing systems. However, their substandard mechanical performance limits the capability of sensors developed using flexible piezoelectric materials. This study introduces a novel design strategy for preparing high‐strength flexible piezoelectric composite materials comprising unidirectional carbon fiber–reinforced potassium sodium niobate (K_0.5Na_0.5NbO₃) nanoparticle–filled epoxy resin (UDCF/KNN–EP). The fibers significantly improve the Young's modulus of UDCF/KNN–EP along the fiber direction, which reaches 282.5 MPa. Moreover, the composite exhibits excellent stretchability and piezoelectric response () in the cross‐fiber direction under cyclic tensile loading. Multiscale finite element analysis is performed via simulation, which allows theoretical examination of the experimental results and the material's mechanical response mechanism. Finally, UDCF/KNN–EP is seamlessly incorporated into athletic gear and used to measure the impact caused by baseball catching and track footfall patterns. This study harnesses the superior strength of carbon fibers to enhance the durability and dependability of self‐powered sensors without compromising flexibility in specific directions.
Effects of Thermal Boundary Resistance on Thermal Management of Gallium-Nitride-Based Semiconductor Devices: A Review Peer-reviewed

Tianzhuo Zhan, Mao Xu, Zhi Cao, Chong Zheng, Hiroki Kurita, Fumio Narita, Yen-Ju Wu, Yibin Xu, Haidong Wang, Mengjie Song, Wei Wang, Yanguang Zhou, Xuqing Liu, Yu Shi, Yu Jia, Sujun Guan, Tatsuro Hanajiri, Toru Maekawa, Akitoshi Okino, Takanobu Watanabe

Micromachines　14　(11)　2076-2076　2023/11/08
Publisher: MDPI AG
DOI： 10.3390/mi14112076 　

eISSN： 2072-666X

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Wide-bandgap gallium nitride (GaN)-based semiconductors offer significant advantages over traditional Si-based semiconductors in terms of high-power and high-frequency operations. As it has superior properties, such as high operating temperatures, high-frequency operation, high breakdown electric field, and enhanced radiation resistance, GaN is applied in various fields, such as power electronic devices, renewable energy systems, light-emitting diodes, and radio frequency (RF) electronic devices. For example, GaN-based high-electron-mobility transistors (HEMTs) are used widely in various applications, such as 5G cellular networks, satellite communication, and radar systems. When a current flows through the transistor channels during operation, the self-heating effect (SHE) deriving from joule heat generation causes a significant increase in the temperature. Increases in the channel temperature reduce the carrier mobility and cause a shift in the threshold voltage, resulting in significant performance degradation. Moreover, temperature increases cause substantial lifetime reductions. Accordingly, GaN-based HEMTs are operated at a low power, although they have demonstrated high RF output power potential. The SHE is expected to be even more important in future advanced technology designs, such as gate-all-around field-effect transistor (GAAFET) and three-dimensional (3D) IC architectures. Materials with high thermal conductivities, such as silicon carbide (SiC) and diamond, are good candidates as substrates for heat dissipation in GaN-based semiconductors. However, the thermal boundary resistance (TBR) of the GaN/substrate interface is a bottleneck for heat dissipation. This bottleneck should be reduced optimally to enable full employment of the high thermal conductivity of the substrates. Here, we comprehensively review the experimental and simulation studies that report TBRs in GaN-on-SiC and GaN-on-diamond devices. The effects of the growth methods, growth conditions, integration methods, and interlayer structures on the TBR are summarized. This study provides guidelines for decreasing the TBR for thermal management in the design and implementation of GaN-based semiconductor devices.
Reproducibility and Compressive Strength Enhancement of Printed Silk Fibroin–Polyethylene Glycidyl Methacrylate Composite Hydrogels Via Cellulose Nanofibers Peer-reviewed

L. Rova, M. Saito, H. Kurita, T. Kanno, A. Gallet-Pandellé, F. Narita

Strength of Materials　55　(6)　1201-1208　2023/11/01
Publisher: Springer Science and Business Media LLC
DOI： 10.1007/s11223-024-00610-2 　

ISSN： 0039-2316

eISSN： 1573-9325
Quantification of damage expansion influence on frequency response function of plate for structural health monitoring with integral differential method Peer-reviewed

Tao Wen, Fumio Narita, Hiroki Kurita, Yu Jia, Yu Shi

Composites Science and Technology　244　110298-110298　2023/11
Publisher: Elsevier BV
DOI： 10.1016/j.compscitech.2023.110298 　

ISSN： 0266-3538
Fabrication of negative magnetostrictive Japanese traditional paper (washi) with cobalt ferrite particles Peer-reviewed

Hiroki Kurita, Lovisa Rova, Takumi Keino, Fumio Narita

Journal of Applied Physics　134　165001　2023/10

DOI： 10.1063/5.0159421 　
Carbon Fiber-Reinforced Piezoelectric Nanocomposites: Design, Fabrication and Evaluation for Damage Detection and Energy Harvesting Peer-reviewed

Yaonan Yu, Yu Shi, Hiroki Kurita, Yu Jia, Zhenjin Wang, Fumio Narita

Composites Part A: Applied Science and Manufacturing　172　107587-107587　2023/09
Publisher: Elsevier BV
DOI： 10.1016/j.compositesa.2023.107587 　

ISSN： 1359-835X
Magnetostrictive Composite Bolt Fastening Characteristics and Internal Axial Force Peer-reviewed

Kotaro Mori, Fumio Narita, Norihito Iriya

Advanced Engineering Materials　25　(21)　2023/08/30
Publisher: Wiley
DOI： 10.1002/adem.202300771 　

ISSN： 1438-1656

eISSN： 1527-2648

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Herein, the fastening characteristics and internal axial force of magnetostrictive composite bolts using magnetic flux‐density change are experimentally and theoretically examined. Magnetostrictive composite bolts are fabricated using FeCo wire and epoxy resin by applying magnetic field and preload. The advantage of using a bolt made of magnetostrictive composite materials is that it has reduced weight and can be applied to prestress. Tightening tests are conducted, with and without external‐bias magnetic fields, to measure bolt strain and magnetic flux‐density change. Then, theoretical and finite element analyses are performed to calculate the strain, axial force, and magnetic flux‐density. Theoretical results are compared with experimental results to determine the relationship between tightening torque, internal axial force, and magnetic flux‐density change. It is found that the applied magnetic field and preload conditions during fabrication, as well as the bias magnetic field during the tightening tests, have a significant effect on the magnetic flux‐density change of magnetostrictive composite bolts. The results of this study help propose new possibilities for internet of things and structural health monitoring nodes.
Piezoelectric Glass‐Fiber‐Reinforced Polymer Sensor for Structural Health Monitoring and Stiffness Sensing Peer-reviewed

Yaonan Yu, Yuki Kubota, Hiroki Kurita, Fumio Narita

Advanced Engineering Materials　25　(20)　2300638　2023/08/18
Publisher: Wiley
DOI： 10.1002/adem.202300638 　

ISSN： 1438-1656

eISSN： 1527-2648
Energy harvesting and wireless communication by carbon fiber-reinforced polymer-enhanced piezoelectric nanocomposites Peer-reviewed

Y. Yu, C. Luo, H. Chiba, Y. Shi, F. Narita

Nano Energy　113　108588　2023/08
Energy-harvesting and mass sensor performances of magnetostrictive cobalt ferrite-spattered Fe–Co alloy plate Peer-reviewed

Hiroki Kurita, Siti Masturah binti Fakhruddin, Kumi Y. Inoue, Takeru Nakaki, Shotaro Kuroda, Zhenjin Wang, Wakako Araki, Hitoshi Shiku, Fumio Narita

Journal of Alloys and Compounds　951　169844-169844　2023/08
Publisher: Elsevier BV
DOI： 10.1016/j.jallcom.2023.169844 　

ISSN： 0925-8388
Performance Evaluation of Magnetostrictive Small Wind Turbines Using Fe–Co Alloy–Based Clad Sheets Peer-reviewed

Toshiki Ueno, Takeru Nakaki, Taisei Mukogawa, Shuonan Dong, Hiroki Kurita, Keisuke Otsuka, Kanjuro Makihara, Fumio Narita

Advanced Engineering Materials　25　(19)　2300185-2300185　2023/07/12
Publisher: Wiley
DOI： 10.1002/adem.202300185 　

ISSN： 1438-1656

eISSN： 1527-2648

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In this study, the Fe–Co alloy is combined with cobalt ferrite (CoFe₂O₄) and nickel (Ni) to form Fe–Co/CoFe₂O₄ and Fe–Co/Ni clad sheets and their energy‐harvesting performance is evaluated. The Fe–Co/CoFe₂O₄ clad sheet exhibits an output voltage of 4.229 mV and an output power of 6.89 nW at a wind speed of 10 m s⁻¹. The energy‐harvesting performance of both these clad sheets cannot be quantitatively compared owing to their different thicknesses, which result in varying volume and distance from the neutral plane. Nevertheless, the values of output voltage and power for Fe–Co/CoFe₂O₄ are higher than those for Fe–Co/Ni (2.107 mV and 0.294 nW).
Crack self-sensing capability of glass fiber reinforced polymer composites embedded with magnetostrictive fibers in mixed-mode bending Peer-reviewed

Tomoki Miyashita, Kenichi Katabira, Hiroki Kurita, Takeru Nakaki, Fumio Narita

Composites Science and Technology　241　110107-110107　2023/06
Publisher: Elsevier BV
DOI： 10.1016/j.compscitech.2023.110107 　

ISSN： 0266-3538
Energy harvesting using a magnetostrictive transducer based on switching control Peer-reviewed

An Li, Keiju Goto, Yuusuke Kobayashi, Yushin Hara, Yu Jia, Yu Shi, Constantinos Soutis, Hiroki Kurita, Fumio Narita, Keisuke Otsuka, Kanjuro Makihara

Sensors and Actuators A: Physical　355　114303-114303　2023/06
Publisher: Elsevier BV
DOI： 10.1016/j.sna.2023.114303 　

ISSN： 0924-4247
Design and Finite Element Analysis of the Electromechanical Performance of Functionally Graded Composites Peer-reviewed

Kohei Maruyama, Zhenjin Wang, Fumio Narita

Journal of Functionally Graded Materials　36　9-12　2023/04
Negative magnetostrictive paper formed by dispersing CoFe2O4 particles in cellulose nanofibrils Peer-reviewed

Takumi Keino, Lovisa Rova, Alia Gallet--Pandellé, Hiroki Kurita, Fumio Narita

Scientific Reports　13　(1)　6144-6144　2023/04

DOI： 10.1038/s41598-023-31655-z 　

eISSN： 2045-2322
Characterization of metal-core piezoelectric fiber/aluminum composite in a large-strain region Peer-reviewed

Tetsuro Yanaseko, Hiroshi Sato, Fumio Narita, Hiroshi Asanuma

Materials Today Communications　35　105942-105942　2023/04
Publisher: Elsevier BV
DOI： 10.1016/j.mtcomm.2023.105942 　

ISSN： 2352-4928
Variation of the Tensile Properties of Basalt-Fiber-Reinforced Polybutylene Succinate Matrix Composites during Microbial Degradation Invited Peer-reviewed

Lovisa Rova, Hiroki Kurita, Shinji Kudo, Sho Hatayama, Teruyoshi Kanno, Alia Gallet--Pandellé, Fumio Narita

Polymers　15　(7)　1796-1796　2023/04

DOI： 10.3390/polym15071796 　

eISSN： 2073-4360
Strengthening Mechanism of Silicon Carbide Green Body via Cellulose Nanofiber Addition

Teruyoshi Kanno, Hiroki Kurita, Fumio Narita

ICCM International Conferences on Composite Materials　2023
Room temperature enhancement of flexural strength in silicon carbide green body via the addition of cellulose nanofiber Peer-reviewed

Teruyoshi Kanno, Hiroki Kurita, Fumio Narita

International Journal of Advanced Manufacturing Technology　125　(5-6)　2055-2064　2023

DOI： 10.1007/s00170-023-10805-7 　

ISSN： 0268-3768

eISSN： 1433-3015
Batteryless wireless magnetostrictive Fe30Co70/Ni clad plate for human coronavirus 229E detection Peer-reviewed

Daiki Neyama, Siti Masturah binti Fakhruddin, Kumi Y. Inoue, Hiroki Kurita, Shion Osana, Naoto Miyamoto, Tsuyoki Tayama, Daiki Chiba, Masahito Watanabe, Hitoshi Shiku, Fumio Narita

Sensors and Actuators A: Physical　349　114052-114052　2023/01
Publisher: Elsevier BV
DOI： 10.1016/j.sna.2022.114052 　

ISSN： 0924-4247
Stress monitoring capability of magnetostrictive Fe–Co fiber/glass fiber reinforced polymer composites under four-point bending Peer-reviewed

Kenichi Katabira, Tomoki Miyashita, Fumio Narita

Scientific Reports　12　(1)　22421-22421　2022/12/27
Publisher: Springer Science and Business Media LLC
DOI： 10.1038/s41598-022-25792-0 　

eISSN： 2045-2322

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Abstract Many structural health monitoring (SHM) techniques have been investigated for damage detection in woven glass fiber reinforced polymer (GFRP) laminates. Recently, the GFRP composites integrated with sensors have received attention because the composite material can transmit information about the structural condition during operation. Magnetostrictive materials are considered as feasible candidates to realize the contactless SHM techniques by exploiting the Villari effect, but the theoretical modeling to correlate a magnetostrictive response with structural conditions is a critical issue. In this study, the analytical procedure considering the mechanics of materials and electromagnetism was proposed to model the magnetic induction by the Villari effect of magnetostrictive GFRP laminates under bending. The magnetostrictive Fe–Co fiber/GFRP composites were then developed, and the four-point bending tests were carried out to evaluate the fabricated composites’ stress monitoring capability. The magnetic flux density behavior corresponded to the bending stress fluctuation. The maximum magnetic flux density change was 70.7 mT subjected to the peak bending stress of 158 MPa. The analytical solutions showed reasonable agreement with the experimental results. The applied stress and measured magnetic flux density were correlated by the theoretical models. Thus, these results suggest an important step in realizing the novel contactless SHM technique utilizing magnetostrictive materials.
Self‐Powered Wearable Piezoelectric Monitoring of Human Motion and Physiological Signals for the Postpandemic Era: A Review Peer-reviewed

Yinli Wang, Yaonan Yu, Xueyong Wei, Fumio Narita

Advanced Materials Technologies　7　(12)　2200318-2200318　2022/12
Publisher: Wiley
DOI： 10.1002/admt.202200318 　

ISSN： 2365-709X

eISSN： 2365-709X
Mode-I fracture control of unidirectional laminated composites using MFC actuators Peer-reviewed

Vikas Kaushik, Nagappa Siddgonde, Fumio Narita, Anup Ghosh

Journal of Intelligent Material Systems and Structures　33　(19)　2440-2453　2022/11
Publisher: SAGE Publications
DOI： 10.1177/1045389x221088032 　

ISSN： 1045-389X

eISSN： 1530-8138

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This article presents an experimental and numerical investigation of Mode-I fracture control in aerospace grade unidirectional laminated composites (AS4/914) using the smart material approach. The P1 type macro fiber composites (MFC) actuators are selected for current research because of their higher free strain, high mechanical flexibility, and good blocking force. The opening mode (Mode-I) interlaminar fracture tests have been carried out on DCB specimens having surface bonded MFC actuator patches under the application of electric voltage within a range of 0–1500 V. These fracture control tests have been performed on pre-cracked (PC) and non pre-cracked (NPC) double cantilever beam specimens. The modified pin force model has been adopted for the evaluation of actuation forces in surface bonded MFC actuators. The XIGA-CZM based numerical formulation is utilized for numerical fracture modeling under electromechanical loading conditions. The MFC actuators have significant control over Mode-I fracture energy under the application of peak operating voltage. The numerical model using a modified pin force model in combination with XIGA-CZM based fracture model shows a good agreement with experimental observations.
Impact energy harvesting and storage through duct airflow using magnetostrictive clad films Peer-reviewed

Toshiki Ueno, Hiroki Kurita, Fumio Narita

AIP Advances　12　(11)　115109-115109　2022/11/01
Publisher: AIP Publishing
DOI： 10.1063/5.0109387 　

eISSN： 2158-3226
Young’s modulus and ferroelectric property of BaTiO₃ films formed by aerosol deposition in consideration of residual stress and film thickness Invited Peer-reviewed

Kohei Maruyama, Yoshihiro Kawakami, Fumio Narita

Japanese Journal of Applied Physics　61　(SN)　SN1011-SN1011　2022/11/01
Publisher: IOP Publishing
DOI： 10.35848/1347-4065/ac7d96 　

ISSN： 0021-4922

eISSN： 1347-4065

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Abstract Film thickening by aerosol deposition (AD) is effective for the fabrication of self-sustained piezoelectric energy harvesting devices. Here we investigated the properties, microstructure, and residual stresses of BaTiO₃ films deposited by AD at different film thicknesses. The Young’s modulus measured by the nanoindentation test showed no thickness dependence; however, it increased from approximately 130– 160 GPa with annealing. Ferroelectric hysteresis curves showed that the increase in film thickness facilitated polarization switching. The microstructure of the films showed no significant changes with the film thickness, while the results of X-ray diffraction and finite element analysis of thermal stress showed that the residual stress after annealing depended on the film thickness. The energy harvesting performance of the BaTiO₃ films deposited by AD may increase owing to the residual stress, rather than the increase in the film thickness.
Detection of virus-like particles using magnetostrictive vibration energy harvesting Peer-reviewed

Hiroki Kurita, Siti Masturah Binti Fakhruddin, Daiki Neyama, Kumi Y. Inoue, Tsuyoki Tayama, Daiki Chiba, Masahito Watanabe, Hitoshi Shiku, Fumio Narita

Sensors and Actuators A: Physical　345　113814-113814　2022/10
Publisher: Elsevier BV
DOI： 10.1016/j.sna.2022.113814 　

ISSN： 0924-4247
Magnetic properties of Fe–Si–B thin films and their application as stress sensors Peer-reviewed

Gildas Diguet, Kei Makabe, Joerg Froemel, Hiroki Kurita, Fumio Narita, Masanori Muroyama

Thin Solid Films　758　139428-139428　2022/09
Publisher: Elsevier BV
DOI： 10.1016/j.tsf.2022.139428 　

ISSN： 0040-6090
Characteristics of carbon fiber reinforced polymers embedded with magnetostrictive Fe–Co wires at room and high temperatures Peer-reviewed

Ryosuke Komagome, Kenichi Katabira, Hiroki Kurita, Fumio Narita

Composites Science and Technology　228　109644-109644　2022/09
Publisher: Elsevier BV
DOI： 10.1016/j.compscitech.2022.109644 　

ISSN： 0266-3538
Magneto Elasticity Modeling for Stress Sensors

Gildas Diguet, Joerg Froemel, Hiroki Kurita, Fumio Narita, Kei Makabe, Koichi Ohtaka

Magnetism　2　(3)　288-305　2022/08/23
Publisher: MDPI AG
DOI： 10.3390/magnetism2030021 　

eISSN： 2673-8724

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In this article, the stress/stress sensing capability of FeSiB thin films is demonstrated and discussed. The sensing relies on the change in permeability by the application of stress, compressive and tensile, and the application of DC magnetic field. This susceptibility/permeability was tested by the exciting field (AC) being in the same direction with the applied stress. The susceptibility was shown to exhibit a maximal value at a given applied stress, the critical stress. Moreover, this maximal amplitude and position was changing with the application of an external DC magnetic field. For the DC field applied in the direction of the exciting field (AC) and longitudinal to the stress, the critical stress was shifted toward negative values and for the DC field applied perpendicularly, the critical stress was shifted toward larger positive values. This was experimentally demonstrated, and a model was constructed for a better understanding.
Thermal stress control of the polymorphic transformation in MnTe semiconductor films

Shunsuke Mori, Yinli Wang, Daisuke Ando, Fumio Narita, Yuji Sutou

Materialia　24　101493-101493　2022/08
Publisher: Elsevier BV
DOI： 10.1016/j.mtla.2022.101493 　

ISSN： 2589-1529
Stress sensor performance of sputtered Fe-Si-B alloy thin coating under tensile and bending loads

Hiroki Kurita, Gildas Diguet, Joerg Froemel, Fumio Narita

Sensors and Actuators A: Physical　343　113652-113652　2022/08
Publisher: Elsevier BV
DOI： 10.1016/j.sna.2022.113652 　

ISSN： 0924-4247
Multifunctional cellular sandwich structures with optimised core topologies for improved mechanical properties and energy harvesting performance

Boyue Chen, Yu Jia, Fumio Narita, Congsi Wang, Yu Shi

Composites Part B: Engineering　238　109899-109899　2022/06
Publisher: Elsevier BV
DOI： 10.1016/j.compositesb.2022.109899 　

ISSN： 1359-8368
Additive manufacturing and energy-harvesting performance of honeycomb-structured magnetostrictive Fe52–Co48 alloys Peer-reviewed

Hiroki Kurita, Paul Lohmuller, Pascal Laheurte, Kenya Nakajima, Fumio Narita

Additive Manufacturing　54　102741-102741　2022/06
Publisher: Elsevier BV
DOI： 10.1016/j.addma.2022.102741 　

ISSN： 2214-8604

eISSN： 2214-8604
Correction to: Effect of Silk Fibroin Concentration on the Properties of Polyethylene Glycol Dimethacrylates for Digital Light Processing Printing (Advanced Engineering Materials, (2021), 23, 9, (2100487), 10.1002/adem.202100487)

Satoshi Egawa, Hiroki Kurita, Teruyoshi Kanno, Fumio Narita

Advanced Engineering Materials　24　(5)　2022/05

DOI： 10.1002/adem.202200495 　

ISSN： 1438-1656

eISSN： 1527-2648
Design and Optimization of a Multimode Low-Frequency Piezoelectric Energy Harvester Peer-reviewed

Longfei He, Fumio Narita

International Journal of Applied Mechanics　14　(04)　2250033-1-2250033-15　2022/05
Publisher: World Scientific Pub Co Pte Ltd
DOI： 10.1142/s1758825122500338 　

ISSN： 1758-8251

eISSN： 1758-826X

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In this paper, we present a microelectromechanical systems (MEMS)-based multimode low-frequency piezoelectric energy harvester (PEH), which can operate at low resonant frequencies (i.e., [Formula: see text][Formula: see text]Hz). The proposed harvester has a symmetric serpentine structure with a doubly clamped configuration comprising several proof masses at the junctions. The optimal parameters of the proposed energy harvester are determined by a computerized optimization technique based on a genetic algorithm (GA). Finite element simulations showed that the optimization results can generate high voltage with two usable low-frequency resonant frequencies. Furthermore, we discuss the array structure based on the proposed PEH. Finite element simulations demonstrate that our piezoelectric MEMS harvester array can generate voltage with a frequency ranging from 110.95 to 157.84[Formula: see text]Hz. Its normalized power density (NDP) when operating in the first four modes is 1284, 932, 1978, and 2592 [Formula: see text]Wcm⁻³ m⁻²s⁴, respectively, and its performance outperforms those of previously reported MEMS-based energy harvesters.
Thermoelectromechanical Characteristics of Piezoelectric Composites Under Mechanical and Thermal Loading Peer-reviewed

Kotaro Mori, Fumio Narita, Zhenjin Wang, Tadashi Horibe, Kensuke Maejima

Advanced Engineering Materials　24　(5)　2101212-2101212　2022/05
Publisher: Wiley
DOI： 10.1002/adem.202101212 　

ISSN： 1438-1656

eISSN： 1527-2648
Effects of Heat Treatment and Cr Content on the Microstructures, Magnetostriction, and Energy Harvesting Performance of Cr‐Doped Fe–Co Alloys Peer-reviewed

Kenya Nakajima, Shota Tanaka, Kotaro Mori, Hiroki Kurita, Fumio Narita

Advanced Engineering Materials　24　(5)　2101036-2101036　2022/05
Publisher: Wiley
DOI： 10.1002/adem.202101036 　

ISSN： 1438-1656

eISSN： 1527-2648
k‐Means Clustering for Prediction of Tensile Properties in Carbon Fiber‐Reinforced Polymer Composites Peer-reviewed

Hiroki Kurita, Masanori Suganuma, Yinli Wang, Fumio Narita

Advanced Engineering Materials　24　(5)　2101072-2101072　2022/05
Publisher: Wiley
DOI： 10.1002/adem.202101072 　

ISSN： 1438-1656

eISSN： 1527-2648
Inverse magnetostrictive properties of twisted Fe–Co alloy wire

Hiroki Kurita, Zhenjin WANG, Fumio Narita

2022/04/13

DOI： 10.51094/jxiv.47 　

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In this study, the inverse magnetostrictive properties of twisted Fe–Co alloy wires and the twisted Fe–Co alloy wire integrated epoxy resin matrix composites were evaluated using free and forced vibration and compressive tests. The inverse magnetostrictive properties of the twisted Fe–Co alloy wires were higher than those of the untwisted wires, with the highest values obtained for the 8-times-twisted Fe–Co alloy wires. However, no clear relationship was observed between the output voltage values and the number of twists. These findings suggested that twisting the Fe–Co alloy wire resulted in residual stress, which may have improved the inverse magnetostrictive properties.
Application of deep neural network learning in composites design Invited Peer-reviewed

Yinli Wang, Constantinos Soutis, Daisuke Ando, Yuji Sutou, Fumio Narita

European Journal of Materials　2　(1)　118-171　2022/04/08
Publisher: Informa UK Limited
DOI： 10.1080/26889277.2022.2053302 　

eISSN： 2688-9277
Direct and inverse magnetostrictive properties of Fe–Co–V alloy particle-dispersed polyurethane matrix soft composite sheets

Hiroki Kurita, Takumi Keino, Takahiro Senzaki, Fumio Narita

Sensors and Actuators A: Physical　337　113427-113427　2022/04
Publisher: Elsevier BV
DOI： 10.1016/j.sna.2022.113427 　

ISSN： 0924-4247
Electromechanical characterization and kinetic energy harvesting of piezoelectric nanocomposites reinforced with glass fibers Peer-reviewed

Kohei Maruyama, Yoshihiro Kawakami, Kotaro Mori, Hiroki Kurita, Yu Shi, Yu Jia, Fumio Narita

Composites Science and Technology　223　109408-109408　2022/03
Publisher: Elsevier BV
DOI： 10.1016/j.compscitech.2022.109408 　

ISSN： 0266-3538
A novel manufacturing method and structural design of functionally graded piezoelectric composites for energy-harvesting Peer-reviewed

Zhenjin Wang, Kohei Maruyama, Fumio Narita

Materials & Design　214　110371-110371　2022/02
Publisher: Elsevier BV
DOI： 10.1016/j.matdes.2021.110371 　

ISSN： 0264-1275
Progress on Materials Reinforcement using Mechanically Defibrillated Cellulose Nanofibers

Hiroki Kurita, Teruyoshi Kanno, Fumio Narita

Zairyo/Journal of the Society of Materials Science, Japan　71　(5)　417-423　2022

DOI： 10.2472/jsms.71.417 　

ISSN： 0514-5163

eISSN： 1880-7488
Additive Manufacturing of Magnetostrictive Fe–Co Alloys Peer-reviewed

K. Nakajima, M. Leparoux, H. Kurita, B. Lanfant, D. Cui, M. Watanabe, T. Sato, F. Narita

Materials　15　(3)　709　2022/01
Fabrication and electromechanical characterization of mullite ceramic fiber/thermoplastic polymer piezoelectric composites Peer-reviewed

Kei Takaishi, Yuki Kubota, Hiroki Kurita, Zhenjin Wang, Fumio Narita

Journal of the American Ceramic Society　105　(1)　308-316　2022/01
Publisher: Wiley
DOI： 10.1111/jace.18047 　

ISSN： 0002-7820

eISSN： 1551-2916
Fabrication, Tensile Properties, and Photodecomposition of Basalt Fiber-Reinforced Cellulose Acetate Matrix Composites Invited Peer-reviewed

Yuxi Shen, Alia Gallet-Pandellé, Hiroki Kurita, Fumio Narita

Polymers　13　(22)　3944　2021/11

DOI： 10.3390/polym13223944 　

eISSN： 2073-4360
Electric polarization and crystal orientation of lead zirconate titanate under mechanical stress due to embedding in a metal matrix Peer-reviewed

Tetsuro Yanaseko, Hiroshi Sato, Fumio Narita, Hiroshi Asanuma

SN Applied Sciences　3　(10)　2021/10
Publisher: Springer Science and Business Media LLC
DOI： 10.1007/s42452-021-04797-w 　

ISSN： 2523-3963

eISSN： 2523-3971

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<title>Abstract</title>The mechanical characteristics of piezoelectric ceramic fibers can be improved by embedding the fibers in a metal matrix. The compressive stress generated during the embedding process, however, limits the polarization of piezoelectric ceramic composites. To study and determine the relationship between the mechanical and piezoelectric properties of piezoelectric ceramics, we analyzed the crystallographic orientation of piezoelectric ceramics embedded in an aluminum matrix via electron backscatter diffraction. The orientation of the crystals before and after the polarization of the piezoelectric fibers, in which residual stresses were generated during embedding, was evaluated. Furthermore, the residual stresses were reduced by heat treatment, and the resultant angle of orientation was evaluated before and after polarization. Results showed that, as the residual stresses were relieved, the orientation of the piezoelectric ceramic crystals changed to reveal increased polarization. Our analysis shows that the crystal orientation of piezoelectric ceramics is impacted by the residual compressive stress that arises from embedding the piezoelectric fiber in the aluminum matrix; it also illustrates the hindering effect of residual stress on the polarization of piezoelectric ceramics.
Evaluation of Electromechanical Properties and Conversion Efficiency of Piezoelectric Nanocomposites with Carbon-Fiber-Reinforced Polymer Electrodes for Stress Sensing and Energy Harvesting

Yaonan Yu, Fumio Narita

Polymers　13　(18)　3184-3184　2021/09/19
Publisher: MDPI AG
DOI： 10.3390/polym13183184 　

eISSN： 2073-4360

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Wireless sensor networks are the future development direction for realizing an Internet of Things society and have been applied in bridges, buildings, spacecraft, and other areas. Nevertheless, with application expansion, the requirements for material performance also increase. Although the development of carbon-fiber-reinforced polymer (CFRP) to achieve these functions is challenging, it has attracted attention because of its excellent performance. This study combined the CFRP electrode with epoxy resin containing potassium sodium niobate piezoelectric nanoparticles and successfully polarized the composite sample. Furthermore, a three-point bending method was applied to compare the bending behavior of the samples. The peak output voltage produced by the maximum bending stress of 98.4 MPa was estimated to be 0.51 mV. Additionally, a conversion efficiency of 0.01546% was obtained. The results showed that the piezoelectric resin with CFRPs as the electrode exhibited stress self-inductance characteristics. This study is expected to be applied in manufacturing self-sensing piezoelectric resin/CFRP composite materials, paving the way for developing stable and efficient self-sensing structures and applications.
Effect of Silk Fibroin Concentration on the Properties of Polyethylene Glycol Dimethacrylates for Digital Light Processing Printing Invited Peer-reviewed

Satoshi Egawa, Hiroki Kurita, Teruyoshi Kanno, Fumio Narita

Advanced Engineering Materials　23　(9)　2100487-2100487　2021/09
Publisher: Wiley
DOI： 10.1002/adem.202100487 　

ISSN： 1438-1656

eISSN： 1527-2648
On the Possibility of Developing Magnetostrictive Fe-Co/Ni Clad Plate with Both Vibration Energy Harvesting and Mass Sensing Elements Invited Peer-reviewed

Kotaro Mori, Yinli Wang, Kenichi Katabira, Daiki Neyama, Ryuichi Onodera, Daiki Chiba, Masahito Watanabe, Fumio Narita

Materials　14　(16)　4486-4486　2021/08/10
Publisher: MDPI AG
DOI： 10.3390/ma14164486 　

eISSN： 1996-1944

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The severe acute respiratory syndrome coronavirus (SARS-CoV-2) has spread rapidly around the world. In order to prevent the spread of infection, city blockades and immigration restrictions have been introduced in each country, but these measures have a severe serious impact on the economy. This paper examines the possibility of both harvesting vibration energy and detecting mass by using a magnetostrictive alloy. Few efforts have been made to develop new magnetostrictive biosensor materials. Therefore, we propose magnetostrictive Fe-Co/Ni clad steel vibration energy harvesters with mass detection, and we numerically and experimentally discuss the effect of the proof mass weight on the frequency shift and output voltage induced by bending vibration. The results reveal that the frequency and output voltage decrease significantly as the mass increases, indicating that the energy harvesting device is capable of mass detection. In the future, device miniaturization and the possibility of virus detection will be considered.
Structural design and performance evaluation of FeCo/epoxy magnetostrictive composites Peer-reviewed

Zhenjun Yang, Zhenjin Wang, Kenya Nakajima, Daiki Neyama, Fumio Narita

Composites Science and Technology　210　108840-108840　2021/07
Publisher: Elsevier BV
DOI： 10.1016/j.compscitech.2021.108840 　

ISSN： 0266-3538
Tensile Properties of Mechanically-Defibrated Cellulose Nanofiber-Reinforced Polylactic Acid Matrix Composites Fabricated by Fused Deposition Modeling Invited Peer-reviewed

H. Kurita, C. Bernard, A. Lavrovsky, F. Narita

Transactions of Nanjing University of Aeronautics and Astronautics　38　(1)　68-74　2021/03
Nanocellulose reinforced silkworm silk fibers for application to biodegradable polymers Peer-reviewed

Chen Wu, Satoshi Egawa, Teruyoshi Kanno, Hiroki Kurita, Zhenjin Wang, Eiji Iida, Fumio Narita

Materials & Design　202　109537-109537　2021/02
Publisher: Elsevier BV
DOI： 10.1016/j.matdes.2021.109537 　

ISSN： 0264-1275

eISSN： 1873-4197
Mechanical properties of mechanically-defibrated cellulose nanofiber reinforced epoxy resin matrix composites Peer-reviewed

Hiroki Kurita, Ryugo Ishigami, Chen Wu, Fumio Narita

Journal of Composite Materials　55　(4)　455-464　2021/02
Publisher: SAGE Publications
DOI： 10.1177/0021998320967430 　

ISSN： 0021-9983

eISSN： 1530-793X
Design and Finite Element Simulation of Metal-Core Piezoelectric Fiber/Epoxy Matrix Composites for Virus Detection Peer-reviewed

Y. Wang, Y. Shi, F. Narita

Sensors and Actuators A　2021
A Review of Piezoelectric and Magnetostrictive Biosensor Materials for Detection of Covid-19 and Other Viruses Peer-reviewed

F. Narita, Z. Wang, H. Kurita, Z. Li, Y. Shi, Y. Jia, C. Soutis

Advanced Materials　33　(1)　2005448-2005448　2021/01
Publisher: Wiley
DOI： 10.1002/adma.202005448 　

ISSN： 0935-9648

eISSN： 1521-4095
Electromechanical Response and Residual Thermal Stress of Metal-Core Piezoelectric Fiber /Al Matrix Composites International-journal Peer-reviewed

Yinli Wang, Tetsuro Yanaseko, Hiroki Kurita, Hiroshi Sato, Hiroshi Asanuma, Fumio Narita

Sensors　20　(20)　5799-5799　2020/10/13
Publisher: MDPI AG
DOI： 10.3390/s20205799 　

eISSN： 1424-8220

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It is well known that the curing residual stress induced during a fabrication process has a great influence on the performance of piezoelectric composite devices. The purpose of this work was to evaluate the residual thermal stress of lead zirconate titanate piezoelectric fiber aluminum (Al) matrix (piezoelectric fiber/Al) composites generated during fabrication numerically and experimentally and to understand the effect of the residual thermal stress on the electromechanical response. The three-dimensional finite element method was employed, and the residual stress generated during the solidification process of the Al matrix was calculated. The output voltage was also calculated in the analysis when putting stresses on the composite materials in the length direction of the piezoelectric fiber. It was shown that the cooling from higher temperatures increases the electromechanical conversion capability. Furthermore, we also performed the simulation, and we recorded the output voltage under concentrated load to investigate its application as a load position detection sensor, and we also discussed the influence of the position by changing the modeling with a different fiber position in the Al. The residual stress of hot press molded piezoelectric fiber/Al composite was then measured, and the comparison was made with the calculated values. The simulation results revealed that our model predictions reproduced and explained the experimental observations of curing residual stress. After this study, similar models of composite materials can be analyzed by this simulation, and the result can be used to design piezoelectric composite materials.
Microstructure‐Enhanced Inverse Magnetostrictive Effect in Fe–Co Alloy Wires Peer-reviewed

Takahiro Yamazaki, Kenichi Katabira, Fumio Narita, Yasubumi Furuya, Wataru Nakao

Advanced Engineering Materials　22　(10)　2000026-2000026　2020/10
Publisher: Wiley
DOI： 10.1002/adem.202000026 　

ISSN： 1438-1656

eISSN： 1527-2648
Potassium sodium niobate lead-free piezoelectric nanocomposite generators based on carbon-fiber-reinforced polymer electrodes for energy-harvesting structures Peer-reviewed

Zhenjin Wang, Hiroki Kurita, Hiroaki Nagaoka, Fumio Narita

Composites Science and Technology　199　108331-108331　2020/10
Publisher: Elsevier BV
DOI： 10.1016/j.compscitech.2020.108331 　

ISSN： 0266-3538
Twisting and Reverse Magnetic Field Effects on Energy Conversion of Magnetostrictive Wire Metal Matrix Composites Peer-reviewed

Zhenjun Yang, Zhenjin Wang, Manabu Seino, Daisuke Kumaoka, Go Murasawa, Fumio Narita

physica status solidi (RRL) – Rapid Research Letters　14　(10)　2070039-2070039　2020/10
Publisher: Wiley
DOI： 10.1002/pssr.202070039 　

ISSN： 1862-6254

eISSN： 1862-6270
Experimental Evaluation of Tensile Properties of Epoxy Composites with Added Cellulose Nanofiber Slurry Peer-reviewed

H. Kurita, R. Ishigami, C. Wu, F. Narita

Strength of Materials　52　(5)　798-804　2020/09

DOI： 10.1007/s11223-020-00233-3 　

ISSN： 0039-2316

eISSN： 1573-9325
Numerical and Experimental Investigation of the Through-Thickness Strength Properties of Woven Glass Fiber Reinforced Polymer Composite Laminates under Combined Tensile and Shear Loading Peer-reviewed

Teruyoshi Kanno, Hiroki Kurita, Masashi Suzuki, Hitoshi Tamura, Fumio Narita

Journal of Composites Science　4　(3)　112-112　2020/08/11
Publisher: MDPI AG
DOI： 10.3390/jcs4030112 　

eISSN： 2504-477X
Fabrication and Mechanical Properties of Carbon-fiber-reinforced Polymer Composites with Lead-free Piezoelectric Nanoparticles Invited Peer-reviewed

Hiroki Kurita, Zhenjin Wang, Hiroaki Nagaoka, Fumio Narita

Sensors and Materials　32　(7)　2453-2453　2020/07/31
Publisher: MYU K.K.
DOI： 10.18494/sam.2020.2820 　

ISSN： 0914-4935
Impact energy harvesting by Fe-Co fiber reinforced Al-Si matrix composite Peer-reviewed

Manabu Seino, Lixin Jiang, Zhenjun Yang, Kenichi Katabira, Tadaaki Satake, Fumio Narita, Go Murasawa

Materialia　10　100644-100644　2020/05
Publisher: Elsevier BV
DOI： 10.1016/j.mtla.2020.100644 　

ISSN： 2589-1529

eISSN： 2589-1529
Multi-Scale Analysis and Testing of Tensile Behavior in Polymers with Randomly Oriented and Agglomerated Cellulose Nanofibers Peer-reviewed

Fumio Narita, Yinli Wang, Hiroki Kurita, Masashi Suzuki

Nanomaterials　10　(4)　700-700　2020/04/07
Publisher: MDPI AG
DOI： 10.3390/nano10040700 　

eISSN： 2079-4991
Fabrication, Modeling and Characterization of Magnetostrictive Short Fiber Composites Peer-reviewed

Zhenjin Wang, Kotaro Mori, Kenya Nakajima, Fumio Narita

Materials　13　(7)　1494-1494　2020/03/25
Publisher: MDPI AG
DOI： 10.3390/ma13071494 　

eISSN： 1996-1944

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Magnetostrictive materials have a wide variety of applications due to their great capability as sensors and energy-harvesting devices. However, their brittleness inhibits their applications as magnetostrictive devices. Recently, we developed a continuous magnetostrictive Fe-Co-fiber-embedded epoxy matrix composite to increase the flexibility of the material. In this study, we fabricated random magnetostrictive Fe-Co short fiber/epoxy composite sheets. It was found that the discontinuous Fe-Co fiber composite sheet has the magnetostrictive properties along the orientation parallel to the length of the sheet. Finite element computations were also carried out using a coupled magneto-mechanical model, for the representative volume element (RVE) of unidirectional aligned magnetostrictive short fiber composites. A simple model of two-dimensional, randomly oriented, magnetostrictive short fiber composites was then proposed and the effective piezomagnetic coefficient was determined. It was shown that the present model is very accurate yet relatively simple to predict the piezomagnetic coefficient of magnetostrictive short fiber composites. This magnetostrictive composite sheet is expected to be used as a flexible smart material.
High temperature electromechanical response of multilayer piezoelectric laminates under AC electric fields for fuel injector applications Peer-reviewed

Fumio Narita, Ryohei Hasegawa, Yasuhide Shindo

International Journal of Mechanics and Materials in Design　16　(1)　207-213　2020/03
Publisher: Springer Science and Business Media LLC
DOI： 10.1007/s10999-019-09453-1 　

ISSN： 1569-1713

eISSN： 1573-8841
Assessing the Flexural Properties of Epoxy Composites with Extremely Low Addition of Cellulose Nanofiber Content Peer-reviewed

Yingmei Xie, Hiroki Kurita, Ryugo Ishigami, Fumio Narita

Applied Sciences　10　(3)　1159-1159　2020/02/09
Publisher: MDPI AG
DOI： 10.3390/app10031159 　

eISSN： 2076-3417
Fabrication and characterization of lead-free functionally graded piezocomposites

Zhenjin Wang, Fumio Narita

Proceedings of SPIE - The International Society for Optical Engineering　11377　2020
Publisher: SPIE
DOI： 10.1117/12.2557704 　

ISSN： 1996-756X 0277-786X
Effects of additional elements (Cr, Mo) and heat treatment on the magnetostrictive, magnetic, and mechanical properties of Co-rich Fe-Co alloys

Kenya Nakajima, Hiroki Kurita, Fumio Narita

Proceedings of SPIE - The International Society for Optical Engineering　11377　2020

DOI： 10.1117/12.2558417 　

ISSN： 0277-786X

eISSN： 1996-756X
Effect of composite design parameters on the inverse magnetostrictive characteristics of hybrid carbon fiber reinforced plastic embedded with Fe-Co fibers

Kenichi Katabira, Hiroki Kurita, Ryosuke Komagome, Fumio Narita

Proceedings of SPIE - The International Society for Optical Engineering　11377　2020

DOI： 10.1117/12.2557191 　

ISSN： 0277-786X

eISSN： 1996-756X
Fabrication of potassium sodium niobate nano-particle/polymer composites with piezoelectric stability and their application to unsteady wind energy harvesters Peer-reviewed

Zhenjin Wang, Fumio Narita

Journal of Applied Physics　126　(22)　224501-224501　2019/12/14
Publisher: AIP Publishing
DOI： 10.1063/1.5127937 　

ISSN： 0021-8979

eISSN： 1089-7550
Magnetomechanical design and power generation of magnetostrictive clad plate cantilever Peer-reviewed

Zhenjun Yang, Ryuichi Onodera, Tsuyoki Tayama, Masahito Watanabe, Fumio Narita

Applied Physics Letters　115　(24)　243504-243504　2019/12/09
Publisher: AIP Publishing
DOI： 10.1063/1.5111351 　

ISSN： 0003-6951

eISSN： 1077-3118
Effect of Notches on Magnetic Induction Variation for Magnetostrictive Clad Plate Invited Peer-reviewed

Zhenjun Yang, Hiroki Kurita, Hiroki Takeuchi, Kenya Nakajima, Fumio Narita

Sensors and Materials　31　(11)　3681-3681　2019/11/22
Publisher: MYU K.K.
DOI： 10.18494/sam.2019.2146 　

ISSN： 0914-4935
Fabrication and Characterization of Carbon Fiber Reinforced Plastics Containing Magnetostrictive Fe-Co Fibers with Damage Self-Detection Capability Invited Peer-reviewed

Kenichi Katabira, Hiroki Kurita, Yu Yoshida, Fumio Narita

Sensors　19　(22)　4984-4984　2019/11/15
Publisher: MDPI AG
DOI： 10.3390/s19224984 　

ISSN： 1424-8220

eISSN： 1424-8220
Improvement Estimation Accuracy of Impact Detection Using Metal‐Core Piezoelectric Fiber/Aluminum Composites Peer-reviewed

Tetsuro Yanaseko, Hiroshi Sato, Fumio Narita, Isao Kuboki, Hiroshi Asanuma

Advanced Engineering Materials　21　(11)　1900550-1900550　2019/11
Publisher: Wiley
DOI： 10.1002/adem.201900550 　

ISSN： 1438-1656

eISSN： 1527-2648
Evaluation of the inverse magnetostrictive effect in heat‐treated Fe‐Co wire/polymer composites Invited Peer-reviewed

Kenichi Katabira, Natsuko Kimura, Takahiro Yamazaki, Fumio Narita

Material Design & Processing Communications　1　(5)　e81　2019/10
Publisher: Wiley
DOI： 10.1002/mdp2.81 　

ISSN： 2577-6576

eISSN： 2577-6576
Design, fabrication and evaluation of metal-matrix lightweight magnetostrictive fiber composites Peer-reviewed

Zhenjun Yang, Kenya Nakajima, Lixin Jiang, Hiroki Kurita, Go Murasawa, Fumio Narita

Materials & Design　175　107803-107803　2019/08
Publisher: Elsevier BV
DOI： 10.1016/j.matdes.2019.107803 　

ISSN： 0264-1275

eISSN： 1873-4197
Performance boost of co-rich fe-co based alloy magnetostrictive sensors via nitrogen treatment Peer-reviewed

Kenya Nakajima, Hiroki Kurita, Fumio Narita

Sensors and Actuators A: Physical　295　75-83　2019/08
Publisher: Elsevier BV
DOI： 10.1016/j.sna.2019.05.033 　

ISSN： 0924-4247
Crack initiation behavior of titanium boride whisker reinforced titanium matrix composites during small punch testing Invited Peer-reviewed

Hiroki Kurita, Kazuya Sakayanagi, Shoichi Kikuchi, Noriharu Yodoshi, Sophie Gourdet, Fumio Narita

Material Design & Processing Communications　1　(4)　e80　2019/08
Publisher: Wiley
DOI： 10.1002/mdp2.80 　

ISSN： 2577-6576

eISSN： 2577-6576
Strengthening Mechanism of Titanium Boride Whisker-Reinforced Ti-6Al-4V Alloy Matrix Composites with the TiB Orientation Perpendicular to the Loading Direction Invited Peer-reviewed

Hiroki Kurita, Shiori Suzuki, Shoichi Kikuchi, Noriharu Yodoshi, Sophie Gourdet, Fumio Narita

Materials　12　(15)　2401-2401　2019/07/28
Publisher: MDPI AG
DOI： 10.3390/ma12152401 　

eISSN： 1996-1944
Corona Poling Conditions for Barium Titanate/Epoxy Composites and their Unsteady Wind Energy Harvesting Potential Peer-reviewed

Zhenjin Wang, Fumio Narita

Advanced Engineering Materials　21　(7)　1900169-1900169　2019/07
Publisher: Wiley
DOI： 10.1002/adem.201900169 　

ISSN： 1438-1656

eISSN： 1527-2648
Footstep Energy Harvesting with the Magnetostrictive Fiber Integrated Shoes Invited Peer-reviewed

Hiroki Kurita, Kenichi Katabira, Yu Yoshida, Fumio Narita

Materials　12　(13)　2055-2055　2019/06/26
Publisher: MDPI AG
DOI： 10.3390/ma12132055 　

eISSN： 1996-1944
The insert effect of cellulose nanofiber layer on glass fiber‐reinforced plastic laminates and their flexural properties Invited Peer-reviewed

Hiroki Kurita, Yingmei Xie, Kenichi Katabira, Risa Honda, Fumio Narita

Material Design & Processing Communications　1　(3)　e58-e58　2019/06
Publisher: Wiley
DOI： 10.1002/mdp2.58 　

ISSN： 2577-6576

eISSN： 2577-6576
Evaluation of vibration energy harvesting using a magnetostrictive iron-cobalt/nickel-clad plate Peer-reviewed

Zhenjun Yang, Hiroki Kurita, Ryuichi Onodera, Tsuyoki Tayama, Daiki Chiba, Fumio Narita

Smart Materials and Structures　28　(3)　034001　2019/02

DOI： 10.1088/1361-665X/aaf9f2 　

ISSN： 0964-1726

eISSN： 1361-665X
Mixed Mode Fracture Behavior of Notched Giant Magnetostrictive: Mechanical Characterization and Comparison among Failure Criteria Peer-reviewed

M. Peron, K. Katabira, L. M. Viespoli, F. Narita, F. Berto

Theoretical and Applied Fracture Mechanics　99　194-204　2019/02
Fabrication and Impact Output Voltage Characteristics of Carbon Fiber Reinforced Polymer Composites with Lad-Free Piezoelectric Nano-Particles Peer-reviewed

F. Narita, H. Nagaoka, Z. Wang

Materials Letters　236　487-490　2019/02
Evaluation of Energy Harvesting Characteristics of Functionally Graded Piezoelectric Composite considering Thermal Properties

MORI Kotaro, MAEJIMA Kensuke, HORIBE Tadashi, NISHI Tsuyoshi, WANG Zhenjin, NARITA Fumio

The Proceedings of the Materials and Mechanics Conference　2019　OS0229　2019
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemm.2019.os0229 　

eISSN： 2424-2845

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This study deals with the electromechanical and thermoelectric responses in functionally graded piezocomposites (FGPCs) under mechanical load and temperature change both numerically and experimentally. Piezocomposites were made of single layer and six layers using epoxy and piezoelectric material BaTiO₃. Experiments were conducted to measure the tip deflection, strain and induced voltage for the piezocomposites under mechanical loads and temperature change. A finite element analysis (FEA) is employed to calculate the tip deflection, strain, stress and induced voltage by mechanical loads and the temperature change, and comparison was then made between simulation and experiment. And, using the phenomenological model that considers the temperature dependence of the piezoelectric constant, dielectric constant, and linear expansion coefficient in the calculation, we investigate the influence of the temperature dependence of the physical property value on the deformation, internal stress, and induced voltage. As a result, the variation of the material properties is shown to govern the deflection and induced voltage of the piezocomposites. In conclusion, functional grading of materials could change the magnitude of internal stresses or obtain an optimal pattern of normal and shear stresses in energy harvesting devices for a given design application.
The Output Voltage Analysis of Pt-Core PZT Fiber/Al Matrix Composite Materials with Finite Element Simulation

WANG Yinli, YANG Zhenjun, WANG Zhenjin, YANASEKO Tetsuro, SATO Hiroshi, ASANUMA Hiroshi, NARITA Fumio

The Proceedings of Mechanical Engineering Congress, Japan　2019　S03134P　2019
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecj.2019.s03134p 　

eISSN： 2424-2667

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This paper studies the electromechanical response of metal-core piezoelectric fiber/Al matrix composite materials subjected to thermal and electromechanical loading. Three-dimensional finite element simulations of the composite materials were conducted, and the residual thermal stresses were predicted after the temperature was set from melting point of Al to room temperature. Fig.1 shows the finite element model. When putting stresses on the composite materials in the length direction of the PZT fiber, the output voltage was calculated in the analysis. The result of the output voltage can predict the electromechanical conversion capability. Furthermore, we also performed the simulation of the inverse piezoelectric effect, and we recorded the strain under different input voltage. And also we discussed the influence of the position by changing the modelling with different fiber position in Al and metal-core position in PZT fiber. After this study, the similar models of composite materials can be analyzed by this simulation, and the result can be used to design the piezoelectric composite materials.
Development and Characterization of Fe-Co Magnetostrictive Filler/Epoxy Resin Sheets

WANG Zhenjin, YANG Zhenjun, KATABIRA Kenichi, KURITA Hiroki, NARITA Fumio

The Proceedings of Mechanical Engineering Congress, Japan　2019　S03112　2019
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecj.2019.s03112 　

eISSN： 2424-2667

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The magnetostrictive materials are widely used in various fields such as sensors, actuators, energy harvesting devices and so on [1]. Among several magnetostrictive materials, Terfenol-D is widely used for various applications due to its largest magnetostriction at room-temperature while Terfenol-D is expensive. Therefore, we have focused on Fe-Co alloys [2, 3], which are lower cost, have better workability, and higher strength compared with Terfenol-D. It is highly expected that Fe-Co fibers/epoxy composites can be put into practical use as lightweight magnetostrictive materials with an excellent flexibility and a toughness. In this study, we fabricated discontinuous Fe-Co fibers/epoxy composite sheets and investigated its magnetic properties. Fig.1 shows the fabrication process of discontinuous Fe-Co fibers/epoxy composite sheets. The fabricated Fe-Co fibers/epoxy composite sheets of length 70 mm, width 25 mm and thickness 0.45 mm were cut to approximately 6 60.45 mm³ and their magnetic induction vs magnetic field and strain vs magnetic field curves were evaluated. It was revealed that the discontinuous Fe-Co fibers homogeneously dispersed epoxy matrix composite sheets has magnetostrictive properties.
Fabrication and various characteristics of carbon fiber reinforced polymer composites with lead-free piezoelectric nano-particles

NAGAOKA Hiroaki, WANG Zhenjin, WU Chen, NARITA Fumio

The Proceedings of the Materials and Mechanics Conference　2019　OS0228　2019
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemm.2019.os0228 　

eISSN： 2424-2845

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Wearable Internet of Things (IoT) devices for sports require an innovatively designed self-powered technology that is can wirelessly transmit and receive signals (force, ambient condition) from the item wearing on the body. To archieve this, we need a vibration/impact energy harvesting materials that is lightweight yet excellent resistance to intense exercise. In this study, we propose piezoelectric hybrid carbon fiber reinforced polymer (CFRP) composite laminates by embedding potassium sodium niobate (KNN) nano-particle filled epoxy interlayer, with a successfull polarization. The output voltage of the specimens was higher than 50mV by the impact. Our work represents an important step forward in the development of piezoelectric CFRP composite materials for energy harvesting applications and allows to develop the lightweight, robust and efficient energy harvesting sport equipment.
Fabrication and impact output voltage characteristics of carbon fiber reinforced polymer composites with lead-free piezoelectric nano-particles

NAGAOKA Hiroaki, WANG Zhenjin, NARITA Fumio

The Proceedings of Mechanical Engineering Congress, Japan　2019　S03132P　2019
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecj.2019.s03132p 　

eISSN： 2424-2667

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Wearable Internet of Things (IoT) devices for sports require an innovative design of a self-powered technology that is able to wirelessly transmit and receive the signal (force, ambient condition) forms a body wearing item, relying upon the vibration/impact energy harvesting materials that possess lightweight but excellent resistance to intense exercise. In this study, piezoelectric hybrid carbon fiber reinforced polymer (CFRP) composite laminates are developed by embedding potassium sodium niobate (KNN) nano-particle filled epoxy interlayer, and the composite samples are successfully polarized. The output voltage of the samples due to impact load is then measured.The results show that a voltage higher than 50 mV is generated. Our work represents an important step forward in the development of piezoelectric CFRP composite materials for energy harvesting applications and opens the door for further development of lightweight, robust and efficient energy harvesting sport equipment.
Enhancement of Inverse Magnetostrictive Effect through Stress Concentration for a Notch-Introduced FeCo Alloy Peer-reviewed

Zhenjun Yang, Hiroki Kurita, Hiroki Takeuchi, Kenichi Katabira, Fumio Narita

Advanced Engineering Materials　21　(1)　1800811-1800811　2019/01
Publisher: Wiley
DOI： 10.1002/adem.201800811 　

ISSN： 1438-1656

eISSN： 1527-2648
Interlaminar Tension-Tension Fatigue of Woven Glass Fiber Reinforced Plastic Composite Laminates at Low Temperatures Peer-reviewed

Fumio Narita

Journal of Composites and Biodegradable Polymers　6　(1)　28-33　2018/12/22
Publisher: Savvy Science Publisher
DOI： 10.12974/2311-8717.2018.06.4 　

eISSN： 2311-8717
A Review on Piezoelectric, Magnetostrictive, and Magnetoelectric Materials and Device Technologies for Energy Harvesting Applications Invited Peer-reviewed

Fumio Narita, Marina Fox

Advanced Engineering Materials　20　(5)　1700743　2018/05/01
Publisher: Wiley-VCH Verlag
DOI： 10.1002/adem.201700743 　

ISSN： 1527-2648 1438-1656
Effect of Temperature on the Tensile Strength of Triaxial Woven CFRP Peer-reviewed

K. Nakajima, S. Kumagai, A. Watanabe, F. Narita

Research & Development in Material Science　5　(4)　000619　2018/04
On the Energy Harvesting Potential of Lead-Free Piezoelectric Composites from Air-Flow and Temperature Change Peer-reviewed

Z. Wang, S. Abe, F. Narita

Research & Development in Material Science　5　(4)　000607　2018/04
Fabrication of Fe-Co magnetostrictive fiber reinforced plastic composites and their sensor performance evaluation Peer-reviewed

Kenichi Katabira, Yu Yoshida, Atsuji Masuda, Akihito Watanabe, Fumio Narita

Materials　11　(3)　406　2018/03/09
Publisher: MDPI AG
DOI： 10.3390/ma11030406 　

ISSN： 1996-1944
Magnetostrictive clad steel plates for high-performance vibration energy harvesting Peer-reviewed

Zhenjun Yang, Kenya Nakajima, Ryuichi Onodera, Tsuyoki Tayama, Daiki Chiba, Fumio Narita

Applied Physics Letters　112　(7)　073902　2018/02/12
Publisher: American Institute of Physics Inc.
DOI： 10.1063/1.5016197 　

ISSN： 0003-6951
Evaluation of Energy Harvesting Characteristics of Functionally Graded Piezoelectric Composite by Mechanical Load and Temperature Change

MORI Kotaro, MAEJIMA Kensuke, HORIBE Tadashi, WANG Zhenjin, NARITA Fumio

The Proceedings of the Materials and Mechanics Conference　2018　OS1008　2018
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemm.2018.os1008 　

eISSN： 2424-2845

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This paper describes the results of our numerical study of the electromechanical and thermoelectric responses in functionally graded piezocomposites (FGPCs) under mechanical load and temperature change. A finite element analysis (FEA) is employed to simulate the bending behavior by concentrated and cyclic loads and the deformation by temperature change of FGPCs. A phenomenological model considering the temperature dependence of piezoelectric constants and permittivity is used in the calculation, and the effects of property gradation on the deformation, internal stress and induced voltage of the FGPCs are examined.
Fabrication of Lead-Free Piezoelectric Particle/Polymer Composites and Voltage Output due to Air-Flow/Temperature Change

WANG Zhenjin, YANG Zhenjun, KAWAKAMI Yoshihiro, NARITA Fumio

The Proceedings of the Materials and Mechanics Conference　2018　OS1009　2018
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemm.2018.os1009 　

eISSN： 2424-2845

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With the appearance of the wearable devices and Internet of Things (IoT) sensors, energy harvesting devices are becoming more and more important. Energy harvesting is a process that captures unused ambient energy. We present the results of output voltage measurements in lead-free piezoelectric particle/polymer composites due to air-flow or temperature change. Barium titanate (BTO)/epoxy composite and potassium sodium niobate (KNN)/epoxy composite sheets were prepared. The composite specimens were polarized using either a parallel plate contact or contactless (corona) polarization technique. The output voltage was then measured for the composites due to air-flow and temperature changes. As the same time, the effect of polarization condition on the performance was discussed.
Nano cellulose/Silk Composite Fibers Tensile Response Characteristics

WU Chen, KURITA Hiroki, WANG Zhenjin, NARITA Fumio

The Proceedings of the Materials and Mechanics Conference　2018　OS1027　2018
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemm.2018.os1027 　

eISSN： 2424-2845

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Silkworm silk is gaining significant attention from both the textile industry and research society because of its outstanding mechanical properties and lustrous appearance. The possibility of creating tougher silks attracts particular research interest. Cellulose nanofiber (CNF) is widely studied for its use as reinforcement for its excellent mechanical properties combined with relatively low density, and also promising biocompatibility. In this study, we demonstrated that CNF dispersed silk fibers had outstanding tensile properties compare to silk without CNF.
Fabrication of cellulose nanofiber/glass fiber-reinforced composites and their bending behavior evaluation

Yingmei Xie, Hiroki Kurita, Risa Honda, Kenichi Katabira, Fumio Narita

33rd Technical Conference of the American Society for Composites 2018　3　1934-1940　2018
Piezoelectric Energy Harvesting Characteristics of Barium Titanate Based Composite Laminates under Cyclic Concentrated Loads Peer-reviewed

F. Narita, X. Zhu, Y. Shindo

5　43-47　2017/12
Three-point bending fatigue of cracked giant magnetostrictive materials under magnetic fields Peer-reviewed

Fumio Narita, Koji Shikanai, Yasuhide Shindo, Kotaro Mori

ACTA MECHANICA　228　(11)　3867-3876　2017/11

DOI： 10.1007/s00707-017-1925-1 　

ISSN： 0001-5970

eISSN： 1619-6937
Potential of energy harvesting in barium titanate based laminates from room temperature to cryogenic/high temperatures: measurements and linking phase field and finite element simulations Peer-reviewed

Fumio Narita, Marina Fox, Kotaro Mori, Hiroki Takeuchi, Takuya Kobayashi, Kenji Omote

SMART MATERIALS AND STRUCTURES　26　(11)　115027　2017/11

DOI： 10.1088/1361-665X/aa91a5 　

ISSN： 0964-1726

eISSN： 1361-665X
Fracture behavior and crack sensing capability of bonded carbon fiber composite joints with carbon nanotube-based polymer adhesive layer under Mode I loading Peer-reviewed

Tomo Takeda, Fumio Narita

COMPOSITES SCIENCE AND TECHNOLOGY　146　(7)　26-33　2017/07

DOI： 10.1016/j.compscitech.2017.04.014 　

ISSN： 0266-3538

eISSN： 1879-1050
Dynamic fatigue of cracked piezoelectric ceramics in three-point bending under electric fields at cryogenic temperatures Peer-reviewed

Yasuhide Shindo, Fumio Narita, Yuhei Goto

ENGINEERING FRACTURE MECHANICS　178　258-264　2017/06

DOI： 10.1016/j.engfracmech.2017.04.031 　

ISSN： 0013-7944

eISSN： 1873-7315
Energy Harvesting from Temperature Change by Piezoelectric/CNT-based Polymer Composite Laminates Peer-reviewed

M. Fox, K. Mori, F. Narita

Proceedings of the JSME 2017 International Conference on Materials and Processing　ICMP2017-4342 (4 pages)　2017/06
Cryogenic static fatigue of cracked piezoelectric ceramics in three-point bending under electric fields Peer-reviewed

Yasuhide Shindo, Fumio Narita, Yuhei Goto

ACTA MECHANICA　228　(4)　1407-1413　2017/04

DOI： 10.1007/s00707-016-1782-3 　

ISSN： 0001-5970

eISSN： 1619-6937
Stress-Rate Dependent Output Voltage for Fe29Co71 Magnetostrictive Fiber/Polymer Composites: Fabrication, Experimental Observation and Theoretical Prediction Peer-reviewed

Fumio Narita, Kenichi Katabira

MATERIALS TRANSACTIONS　58　(2)　302-304　2017

DOI： 10.2320/matertrans.M2016410 　

ISSN： 1345-9678

eISSN： 1347-5320
Inverse Magnetostrictive Effect in Fe29Co71 Wire/Polymer Composites Peer-reviewed

F. Narita

Advanced Engineering Materials　19　(1)　1600586　2017/01
Fracture Behavior of Cracked Giant Magnetostrictive Materials in Three-Point Bending under Magnetic Fields: Strain Energy Density Criterion Peer-reviewed

Marco Colussi, Filippo Berto, Kotaro Mori, Fumio Narita

ADVANCED ENGINEERING MATERIALS　18　(12)　2063-2069　2016/12

DOI： 10.1002/adem.201500533 　

ISSN： 1438-1656

eISSN： 1527-2648
Evaluation of Dielectric and Piezoelectric Behavior of Unpoled and Poled Barium Titanate Polycrystals with Oxygen Vacancies using Phase Field Method Peer-reviewed

F. Narita, T. Kobayashi, Y. Shindo

International Journal of Smart and Nano Materials　7　(4)　265-275　2016/12
Effect of the Loading Rate on the Brittle Fracture of Terfenol-D Specimens in Magnetic Field: Strain Energy Density Approach Peer-reviewed

M. Colussi, F. Berto, K. Mori, F. Narita

STRENGTH OF MATERIALS　48　(6)　791-800　2016/11

DOI： 10.1007/s11223-017-9826-z 　

ISSN： 0039-2316

eISSN： 1573-9325
Piezoelectric Vibration Energy Harvesting Characteristics of Barium Titanate Laminates Peer-reviewed

F. Narita, X. Zhu, Y. Shindo

Advances in Theoretical and Applied Mechanics　9　(1)　43-54　2016/10
Mechanical Property Evaluation of Triaxial Woven CFRP from Low to High Temperatures and Multi-Functionalization of Composites with Modified Resin Peer-reviewed

K. Nakajima, S. Kumagai, A. Watanabe, F. Narita

Proceedings, The 5th Asian Conference on Mechanics of Functional Materials and Structures　198-201　2016/10
Fabrication and Magneto-Mechanical Behavior of Polymer Matrix/Terfenol-D Hybrid Composites Peer-reviewed

K. Katabira, F. Narita

Proceedings, The 5th Asian Conference on Mechanics of Functional Materials and Structures　202-205　2016/10
Crack Self-Sensing of CNT-based Epoxy Bonded CFRP Joints under Mode I Loading Peer-reviewed

T. Takeda, F. Narita

Proceedings, The 10th International Conference on Fracture and Strength of Solids　2016/08
Three-Point Bending Fracture Behavior of Cracked Giant Magnetostrictive Materials Under Magnetic Fields Peer-reviewed

Fumio Narita, Koji Shikanai, Yasuhide Shindo, Kotaro Mori

JOURNAL OF TESTING AND EVALUATION　44　(4)　1454-1460　2016/07

DOI： 10.1520/JTE20140439 　

ISSN： 0090-3973

eISSN： 1945-7553
Strain Energy Density Based Assessment of Cracked Terfenol-D Specimens under Magnetic Field and Different Loading Rates Peer-reviewed

M. Colussi, F. Berto, K. Mori, F. Narita

Structural Integrility Procedia　2　1837-1844　2016/06
Deformation and failure of hybrid beams consisting of woven carbon fiber composite and shape memory polymer layers under flexural loading Peer-reviewed

Tomo Takeda, Fumio Narita, Yasuhide Shindo

JOURNAL OF SANDWICH STRUCTURES & MATERIALS　18　(1)　113-128　2016/01

DOI： 10.1177/1099636215607395 　

ISSN： 1099-6362

eISSN： 1530-7972
Detection and response characteristics of giant magnetostrictive/piezoelectric laminated cantilevers under cyclic bending Peer-reviewed

Kotaro Mori, Yasuhide Shindo, Fumio Narita, So Okura

MECHANICS OF ADVANCED MATERIALS AND STRUCTURES　23　(2)　180-186　2016

DOI： 10.1080/15376494.2014.949924 　

ISSN： 1537-6494

eISSN： 1537-6532
Electromechanical response of polycarbonate-CNT/PZT laminates subjected to cyclic bending Peer-reviewed

Fumio Narita, So Okura, Yasuhide Shindo, Tomo Takeda

INTERNATIONAL JOURNAL OF MATERIALS & PRODUCT TECHNOLOGY　52　(3-4)　276-285　2016

DOI： 10.1504/IJMPT.2016.075495 　

ISSN： 0268-1900

eISSN： 1741-5209
Recent results on the brittle fracture of terfenol-D specimens under magnetic field Peer-reviewed

Marco Colussi, Filippo Berto, Kotaro Mori, Fumio Narita

American Journal of Engineering and Applied Sciences　9　(4)　1239-1246　2016
Publisher: Science Publications
DOI： 10.3844/ajeassp.2016.1239.1246 　

ISSN： 1941-7039 1941-7020
Characteristics of vibration energy harvesting using giant magnetostrictive cantilevers with resonant tuning Peer-reviewed

Kotaro Mori, Tadashi Horibe, Shigekazu Ishikawa, Yasuhide Shindo, Fumio Narita

SMART MATERIALS AND STRUCTURES　24　(12)　125032 (7 pages)　2015/12

DOI： 10.1088/0964-1726/24/12/125032 　

ISSN： 0964-1726

eISSN： 1361-665X
Detection and Response Characteristics of Clamped-Free Giant Magnetostrictive/Piezoelectric Laminates under Concentrated Loading Peer-reviewed

K. Mori, F. Narita, Y. Shindo

AIMS Materials Science　4　(2)　401-413　2015/10
Cryogenic through-thickness tensile characterization of plain woven glass/epoxy composite laminates using cross specimens: Experimental test and finite element analysis Peer-reviewed

Tomo Takeda, Fumio Narita, Yasuhide Shindo, Kazuaki Sanada

COMPOSITES PART B-ENGINEERING　78　42-49　2015/09

DOI： 10.1016/j.compositesb.2015.03.076 　

ISSN： 1359-8368

eISSN： 1879-1069
Phase field simulation on the electromechanical response of poled barium titanate polycrystals with oxygen vacancies Peer-reviewed

Yasuhide Shindo, Fumio Narita, Takuya Kobayashi

JOURNAL OF APPLIED PHYSICS　117　(23)　234103　2015/06

DOI： 10.1063/1.4922720 　

ISSN： 0021-8979

eISSN： 1089-7550
Piezoelectric Detection and Response Characteristics of Barium Titanate Unimorph Cantilevers under AC Electric Fields Peer-reviewed

F. Narita, Y. Shindo

International Journal of Metallurgical & Materials Engineering　1　(1)　103　2015/04
Fatigue failure and electrical resistance behaviors of carbon nanotube-based polymer composites under uniaxial tension-tension loading in a cryogenic environment Peer-reviewed

Tomo Takeda, Yasuhide Shindo, Zhijuan Wei, Yu Kuronuma, Fumio Narita

JOURNAL OF COMPOSITE MATERIALS　49　(4)　457-463　2015/02

DOI： 10.1177/0021998314521059 　

ISSN： 0021-9983

eISSN： 1530-793X
Fatigue crack propagation in three-point bending of piezoceramics under electromechanical loading

Yasuhide Shindo, Fumio Narita, Mitsuru Hirama

AES-ATEMA International Conference Series - Advances and Trends in Engineering Materials and their Applications　none　11-21　2015
Publisher: Advanced Engineering Solutions
ISSN： 1924-3642
Flexural stiffness variations of woven carbon fiber composite/shape memory polymer hybrid layered beams Peer-reviewed

Tomo Takeda, Yasuhide Shindo, Fumio Narita

JOURNAL OF COMPOSITE MATERIALS　49　(2)　209-216　2015/01

DOI： 10.1177/0021998313515458 　

ISSN： 0021-9983

eISSN： 1530-793X
Loading Rate-Dependent Fracture Properties and Electrical Resistance-Based Crack Growth Monitoring of Polycarbonate Reinforced with Carbon Nanotubes Under Tension Peer-reviewed

Fumio Narita, Yasuhide Shindo, Tomo Takeda, Yu Kuronuma, Kazuaki Sanada

JOURNAL OF TESTING AND EVALUATION　43　(1)　115-122　2015/01

DOI： 10.1520/JTE20130334 　

ISSN： 0090-3973

eISSN： 1945-7553
Electromechanical bending response of PZT/CNT-based polymer laminates subjected to concentrated load Peer-reviewed

Yasuhide Shindo, Fumio Narita, So Okura, Tomo Takeda, Chengju Fu

INTERNATIONAL JOURNAL OF MECHANICS AND MATERIALS IN DESIGN　10　(2)　193-197　2014/06

DOI： 10.1007/s10999-014-9240-7 　

ISSN： 1569-1713

eISSN： 1573-8841
Mixed-mode I/III fatigue delamination growth in woven glass/epoxy composite laminates at cryogenic temperatures Peer-reviewed

Masaya Miura, Yasuhide Shindo, Tomo Takeda, Fumio Narita

JOURNAL OF COMPOSITE MATERIALS　48　(10)　1251-1259　2014/05

DOI： 10.1177/0021998313484951 　

ISSN： 0021-9983

eISSN： 1530-793X
Interlaminar Shear and Electrical Resistance Responses of Woven-Carbon-Fiber-Reinforced-Polymer Composite Laminates at Cryogenic Temperatures From Cyclic Short Beam Shear Tests Peer-reviewed

Yasuhide Shindo, Tomo Takeda, Fumio Narita, Tatsuya Fukuzaki

JOURNAL OF TESTING AND EVALUATION　42　(3)　573-580　2014/05

DOI： 10.1520/JTE20130082 　

ISSN： 0090-3973

eISSN： 1945-7553
Electromechanical response of multilayer piezoelectric actuators for fuel injectors at high temperatures Peer-reviewed

Fumio Narita, Ryohei Hasegawa, Yasuhide Shindo

JOURNAL OF APPLIED PHYSICS　115　(18)　184103　2014/05

DOI： 10.1063/1.4875487 　

ISSN： 0021-8979

eISSN： 1089-7550
Cyclic fatigue behavior of cracked piezoelectric ceramics in three-point bending under electric fields

Fumio Narita, Yasuhide Shindo

AES-ATEMA International Conference Series - Advances and Trends in Engineering Materials and their Applications　2014-　(January)　141-147　2014
Publisher: Advanced Engineering Solutions
ISSN： 1924-3642
Flexural fatigue performance and electrical resistance response of carbon nanotube-based polymer composites at cryogenic temperatures Peer-reviewed

Zhijuan Wei, Tomo Takeda, Fumio Narita, Yasuhide Shindo

CRYOGENICS　59　44-48　2014/01

DOI： 10.1016/j.cryogenics.2013.12.004 　

ISSN： 0011-2275

eISSN： 1879-2235
Short beam interlaminar shear behavior and electrical resistance-based damage self-sensing of woven carbon/epoxy composite laminates in a cryogenic environment Peer-reviewed

Tomo Takeda, Yasuhide Shindo, Tatsuya Fukuzaki, Fumio Narita

JOURNAL OF COMPOSITE MATERIALS　48　(1)　119-128　2014/01

DOI： 10.1177/0021998312469240 　

ISSN： 0021-9983

eISSN： 1530-793X
Cryogenic fracture of cracked piezoelectric ceramics in three-point bending under electric fields Peer-reviewed

Yasuhide Shindo, Fumio Narita

Acta Mechanica　225　(4-5)　1313-1321　2014
Publisher: Springer-Verlag Wien
DOI： 10.1007/s00707-013-1047-3 　

ISSN： 0001-5970
Dynamic bending/torsion and output power of S-shaped piezoelectric energy harvesters Peer-reviewed

Yasuhide Shindo, Fumio Narita

International Journal of Mechanics and Materials in Design　10　(3)　305-311　2014
Publisher: Kluwer Academic Publishers
DOI： 10.1007/s10999-014-9247-0 　

ISSN： 1573-8841 1569-1713
Cryogenic mechanical properties of woven glass/epoxy composites modified with multi-walled carbon nanotube and n-butyl glycidyl ether under tensile static and cyclic loadings Peer-reviewed

Tomo Takeda, Weiwei Fan, Qing-Ping Feng, Shao-Yun Fu, Fumio Narita, Yasuhide Shindo

CRYOGENICS　58　33-37　2013/12

DOI： 10.1016/j.cryogenics.2013.09.005 　

ISSN： 0011-2275

eISSN： 1879-2235
Fatigue delamination growth in woven glass/epoxy composite laminates under mixed-mode II/III loading conditions at cryogenic temperatures Peer-reviewed

Tomo Takeda, Masaya Miura, Yasuhide Shindo, Fumio Narita

CRYOGENICS　58　55-61　2013/12

DOI： 10.1016/j.cryogenics.2013.10.001 　

ISSN： 0011-2275

eISSN： 1879-2235
Effects of electric field and poling on the mode I energy release rate in cracked piezoelectric ceramics at cryogenic temperatures Invited Peer-reviewed

Yasuhide Shindo, Fumio Narita, Masayuki Sato

ACTA MECHANICA　224　(11)　2547-2558　2013/11

DOI： 10.1007/s00707-013-0949-4 　

ISSN： 0001-5970

eISSN： 1619-6937
Strength characterization of woven glass/epoxy composites under tensile fatigue loading at cryogenic temperatures using open hole specimens Peer-reviewed

Yasuhide Shindo, Tomo Takeda, Fumio Narita, Satoru Yamaki

JOURNAL OF COMPOSITE MATERIALS　47　(22)　2885-2893　2013/10

DOI： 10.1177/0021998312459870 　

ISSN： 0021-9983

eISSN： 1530-793X
Effects of electric field and poling on the fatigue of cracked piezoelectric ceramics in cyclic three-point bending Peer-reviewed

Yasuhide Shindo, Masayuki Sato, Fumio Narita

Journal of Electroceramics　31　(1-2)　8-14　2013/10

DOI： 10.1007/s10832-013-9798-8 　

ISSN： 1385-3449 1573-8663
Fatigue Behavior of Cracked Piezoelectric Ceramics in Cyclic Three-Point Bending under AC Electric Fields Peer-reviewed

F. Narita, Y. Shindo, M. Sato

Journal of Solid Mechanics and Materials Engineering　7　(5)　530-539　2013/09
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jmmp.7.530 　

ISSN： 1880-9871

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This paper investigates analytically and experimentally the cyclic fatigue behavior in piezoelectric ceramics with a crack normal to the poling under alternating current (AC) electric fields. Fatigue tests were performed in three-point bending with the single-edge precracked-beam (SEPB) specimens, and numbers of cycles to failure under sinusoidal mechanical loads and AC electric fields were obtained. Finite element analysis was also conducted using a phenomenological model of domain wall motion, and the energy release rate was calculated. The effect of AC electric fields on the maximum energy release rate versus number of cycles to failure curve was then discussed. In addition, the fracture surfaces were examined by scanning electron microscopy to correlate with fatigue characteristics. The important conclusions are that when the AC electric fields with the same phase of the sinusoidal mechanical loads are applied to the cracked piezoelectric ceramics, the number of cycles to failure becomes smaller and the slope of the maximum energy release rate versus number of cycles to failure becomes steeper.
Cryogenic interlaminar fracture properties of woven glass/epoxy composite laminates under mixed-mode I/III loading conditions Peer-reviewed

Masaya Miura, Yasuhide Shindo, Tomo Takeda, Fumio Narita

Applied Composite Materials　20　(4)　587-599　2013/08

DOI： 10.1007/s10443-012-9290-7 　

ISSN： 0929-189X
Piezoelectric control of delamination response in woven fabric composites under mode i loading Invited Peer-reviewed

Yasuhide Shindo, Masaya Miura, Tomo Takeda, Fumio Narita, Shunji Watanabe

Acta Mechanica　224　(6)　1315-1322　2013/06

DOI： 10.1007/s00707-013-0862-x 　

ISSN： 0001-5970
Controllability of cryogenic Mode I delamination behavior in woven fabric composites using piezoelectric actuators Peer-reviewed

Yasuhide Shindo, Shunji Watanabe, Tomo Takeda, Masaya Miura, Fumio Narita

ENGINEERING FRACTURE MECHANICS　102　171-179　2013/04

DOI： 10.1016/j.engfracmech.2013.01.013 　

ISSN： 0013-7944
Cryogenic Electromechanical Response of Multilayer PZT Actuators in Hydrogen Fuel Injectors Invited Peer-reviewed

Y. Shindo, F. Narita

Proceedings of ITALY’2013 Twelve AES-ATEMA International Conference on "Advances and Trends in Engineering Materials and their Applications", Edited by Yehia Haddad and Alfonso Nappi　81-87　2013/04
Effects of electric field and poling on the cyclic bending fatigue in cracked piezoceramics

Yasuhide Shindo, Fumio Narita, Masayuki Sato

13th International Conference on Fracture 2013, ICF 2013　6　4996-5004　2013
Publisher: Chinese Society of Theoretical and Applied Mechanics
Fracture and Fatigue Behavior of Cracked Piezoelectric Ceramics under Electric Fields Invited Peer-reviewed

Y. Shindo, F. Narita

AES Technical Reviews Journals, PART C: International Journal of Advances and Trends in Engineering Materials and their Applications　1　(1)　13-20　2013/01
Crack and electrical resistance behaviors of carbon nanotube-based polymer composites under mixed-mode I/II loading Peer-reviewed

Tomo Takeda, Yasuhide Shindo, Fumitsugu Naraoka, Yu Kuronuma, Fumio Narita

Materials Transactions　54　(7)　1105-1109　2013

DOI： 10.2320/matertrans.M2013080 　

ISSN： 1345-9678
Numerical and experimental study on the response of multi-walled carbon nanotube/polymer composites under compressive loading Invited Peer-reviewed

T. Takeda, F. Narita, Y. Kuronuma, Y. Shindo

International Journal of Materials and Structural Integrity　7　(1-3)　4-21　2013/01/01

DOI： 10.1504/IJMSI.2013.055103 　

ISSN： 1745-0055 1745-0063
Interlaminar fracture characterization of woven glass/epoxy composites under mixed-mode II/III loading conditions at cryogenic temperatures Peer-reviewed

Masaya Miura, Yasuhide Shindo, Tomo Takeda, Fumio Narita

ENGINEERING FRACTURE MECHANICS　96　615-625　2012/12

DOI： 10.1016/j.engfracmech.2012.09.019 　

ISSN： 0013-7944
Three-dimensional stress analysis of cracked satin woven carbon fiber reinforced/polymer composites under tension at cryogenic temperatures Peer-reviewed

Tomo Takeda, Yasuhide Shindo, Shinya Watanabe, Fumio Narita

CRYOGENICS　52　(12)　784-792　2012/12

DOI： 10.1016/j.cryogenics.2012.09.002 　

ISSN： 0011-2275
Electromagneto-Mechanical Behavior of Giant Magnetostrictive/Piezoelectric Laminates in Three-Point Bending under Electric Fields Peer-reviewed

Y. Shindo, K. Mori, F. Narita, Y. Kori

Advances in Theoretical and Applied Mechanics　5　(6)　291-307　2012/12
Dynamic electromagneto-mechanical behavior of clamped-free giant magnetostrictive/piezoelectric laminates under AC electric fields Peer-reviewed

Kotaro Mori, Yasuhide Shindo, Fumio Narita

SMART MATERIALS AND STRUCTURES　21　(11)　115003　2012/11

DOI： 10.1088/0964-1726/21/11/115003 　

ISSN： 0964-1726

eISSN： 1361-665X
Modeling and Characterization of Strain Sensing in CNT-Based Polymer Composites under Tensile Loading Peer-reviewed

Y. Kuronuma, T. Takeda, Y. Shindo, F. Narita, Z. Wei

Proceedings of the ASME 2012 International Mechanical Engineering Congress & Exposition　86474 (2 pages)　2012/11

DOI： 10.1115/IMECE2012-86474 　
Cryogenic Electromechanical Response of Multilayer PbZr_1-XTi_XO_3 Actuators under DC and AC Electric Fields in Hydrogen Fuel Injection Systems Invited Peer-reviewed

Y. Shindo, F. Narita

ICCM2012 Proceedings　303 (7 pages)　2012/11
Dynamic fatigue behavior of cracked piezoelectric ceramics in three-point bending under AC electric fields Peer-reviewed

Fumio Narita, Yu Morikawa, Yasuhide Shindo, Masayuki Sato

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY　32　(14)　3759-3766　2012/11

DOI： 10.1016/j.jeurceramsoc.2012.05.033 　

ISSN： 0955-2219
Mechanical response of nonwoven polyester fabric/epoxy composites at cryogenic temperatures Peer-reviewed

Yasuhide Shindo, Tomo Takeda, Fumio Narita

CRYOGENICS　52　(10)　564-568　2012/10

DOI： 10.1016/j.cryogenics.2012.07.008 　

ISSN： 0011-2275
Electrical resistance-based strain sensing in carbon nanotube/polymer composites under tension: Analytical modeling and experiments Peer-reviewed

Yu Kuronuma, Tomo Takeda, Yasuhide Shindo, Fumio Narita, Zhijuan Wei

COMPOSITES SCIENCE AND TECHNOLOGY　72　(14)　1678-1682　2012/09

DOI： 10.1016/j.compscitech.2012.07.001 　

ISSN： 0266-3538
Relationship between Material Strength and Notched Failure of Woven Glass/Epoxy Composites under Fatigue Loading at Cryogenic Temperatures Peer-reviewed

Y. Shindo, T. Takeda, F. Narita

Proceedings of Can’2012 Eleventh AES-ATEMA International Conference, Edited by Y. M. Haddad　221-225　2012/08
Static and Dynamic Fatigue of Cracked Piezoelectric Ceramics in Three-Point Bending under AC Electric Fields Peer-reviewed

Y. Shindo, F. Narita

Proceedings of the 23rd International Congress of Theoretical and Applied Mechanics, Editors: Yilong Bai, Jianxiang Wang, Daining Fang　SM05-014 (2 pages)　2012/08
Three-Dimensional Cryomechanics Analysis of Satin Woven Carbon/Polymer Composites with Cracks Peer-reviewed

F. Narita, Y. Shindo, T. Takeda

Proceedings of the 23rd International Congress of Theoretical and Applied Mechanics, Editors: Yilong Bai, Jianxiang Wang, Daining Fang　SM08-007 (2 pges)　2012/08
Dynamic Electromechanical Response of Multilayered Piezoelectric Composites from Room to Cryogenic Temperatures for Fuel Injector Applications Invited Peer-reviewed

Y. Shindo, T. Sasakura, F. Narita

ASME Journal of Engineering Materials and Technology　134　(3)　031007　2012/07
Electromagneto-mechanical fields of giant magnetostrictive/piezoelectric laminates under concentrated load Peer-reviewed

Yasuhide Shindo, Yuzo Kori, Kotaro Mori, Fumio Narita

International Journal of Smart and Nano Materials　3　(2)　169-182　2012/06/01

DOI： 10.1080/19475411.2011.649806 　

ISSN： 1947-5411 1947-542X
Dynamic Electromechanical Field Concentrations Near Electrodes in Piezoelectric Thick Films for the Design of MEMS Mirrors Peer-reviewed

Yasuhide Shindo, Fumio Narita, Koji Sato

JOURNAL OF MECHANICAL DESIGN　134　(5)　051005　2012/05

DOI： 10.1115/1.4006265 　

ISSN： 1050-0472
Static Fatigue of Three-Point Bending Piezoelectric Ceramics with a Single-Edge Crack Under AC Electric Fields Peer-reviewed

Yasuhide Shindo, Fumio Narita, Yu Morikawa

JOURNAL OF THE AMERICAN CERAMIC SOCIETY　95　(4)　1326-1332　2012/04

DOI： 10.1111/j.1551-2916.2011.04949.x 　

ISSN： 0002-7820
Electrical resistance change and crack behavior in carbon nanotube/polymer composites under tensile loading Invited Peer-reviewed

Yasuhide Shindo, Yu Kuronuma, Tomo Takeda, Fumio Narita, Shao-Yun Fu

COMPOSITES PART B-ENGINEERING　43　(1)　39-43　2012/01

DOI： 10.1016/j.compositesb.2011.04.028 　

ISSN： 1359-8368

eISSN： 1879-1069
Electromechanical Field Concentrations near Electrodes in Piezoelectric MEMS Mirrors Invited Peer-reviewed

Y. Shindo, F. Narita, K. Sato

AES Technical Reviews Journals, PART C: International Journal of Advances and Trends in Engineering Materials and their Applications　1　(1)　81-86　2012/01
Crack growth characteristics of carbon nanotube-based polymer composites subjected to cyclic loading Peer-reviewed

Yu Kuronuma, Yasuhide Shindo, Tomo Takeda, Fumio Narita

ENGINEERING FRACTURE MECHANICS　78　(17)　3102-3110　2011/12

DOI： 10.1016/j.engfracmech.2011.09.006 　

ISSN： 0013-7944
Electrical and Crack Responses of CNT-Based Polymer Composites under Tension Peer-reviewed

Y. Kuronuma, Y. Shindo, T. Takeda, F. Narita, S.-Y. Fu

Proceedings of the ASME 2011 International Mechanical Engineering Congress & Exposition　62842 (2 pages)　2011/11
Cryogenic electromechanical behavior of multilayer piezo-actuators for fuel injector applications Peer-reviewed

Yasuhide Shindo, Fumio Narita, Takayoshi Sasakura

JOURNAL OF APPLIED PHYSICS　110　(8)　084510　2011/10

DOI： 10.1063/1.3656445 　

ISSN： 0021-8979
NONLINEAR ELECTROMECHANICAL FIELDS AND LOCALIZED POLARIZATION SWITCHING OF PIEZOELECTRIC MACROFIBER COMPOSITES Invited Peer-reviewed

Yasuhide Shindo, Fumio Narita, Koji Sato, Tomo Takeda

JOURNAL OF MECHANICS OF MATERIALS AND STRUCTURES　6　(7-8)　1089-1102　2011/09

DOI： 10.2140/jomms.2011.6.1089 　

ISSN： 1559-3959
Modeling and characterization of the electrical conductivity of carbon nanotube-based polymer composites Peer-reviewed

Tomo Takeda, Yasuhide Shindo, Yu Kuronuma, Fumio Narita

POLYMER　52　(17)　3852-3856　2011/08

DOI： 10.1016/j.polymer.2011.06.046 　

ISSN： 0032-3861

eISSN： 1873-2291
Vacuum crack growth behavior of austenitic stainless steel under fatigue loading Peer-reviewed

T. Takeda, Y. Shindo, F. Narita

Strength of Materials　43　(5)　532-536　2011/08

DOI： 10.1007/s11223-011-9324-7 　

ISSN： 0039-2316 1573-9325
Effects of Electric Field and Poling on the Mode I Energy Release Rate for Two Symmetric Edge Cracks in Rectangular Piezoelectric Ceramic Strips Peer-reviewed

Y. Shindo, F. Narita, T. Matsuda

Journal of Solid Mechanics and Materials Engineering　5　(7)　335-347　2011/07
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jmmp.5.335 　

ISSN： 1880-9871

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This article discusses the results of the mode I energy release rate of rectangular piezoelectric ceramic strips with two symmetric edge cracks under electromechanical loading. Cracks were created normal or parallel to the poling direction, and applied electric fields were parallel/antiparallel to the poling. A nonlinear plane strain finite element analysis was performed, and the effect of localized polarization switching on the energy release rate was discussed for the permeable, impermeable, open and discharging cracks under a high negative electric field. In the case under a high positive electric field, we examined the effect of dielectric breakdown on the energy release rate.
Electromagneto-Mechanical Behavior of Giant Magnetostrictive/Piezoelectric Laminates under Electric Fields for Self-Sensing Cantilever Actuators Peer-reviewed

K. Mori, Y. Shindo, F. Narita

Journal of Solid Mechanics and Materials Engineering　5　(7)　360-369　2011/07
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jmmp.5.360 　

ISSN： 1880-9871

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This work deals with the electromagneto-mechanical behavior of self-sensing giant magnetostrictive/piezoelectric laminated composites under electric fields both numerically and experimentally. The cantilever laminated composite is fabricated using thin magnetostrictive Terfenol-D and piezoelectric PZT layers. The magnetostriction of the laminated composite is first measured. Next, a nonlinear finite element analysis is performed to evaluate the second-order magnetoelastic constants in Terfenol-D layer bonded to PZT layer, using measured data. The tip deflection, internal stresses and induced magnetic field for the giant magnetostrictive/piezoelectric laminated composites under electric fields are then discussed in detail. Experimental results on the tip deflection and magnetic induction change due to electric fields, which verify the model, are also presented.
Evaluation of Tensile Strength of Woven Carbon/Epoxy Composite Laminates at Cryogenic Temperatures Using the Open Hole Specimens Peer-reviewed

Shinya Watanabe, Yasuhide Shindo, Tomo Takeda, Fumio Narita, Satoru Yamaki

JOURNAL OF TESTING AND EVALUATION　39　(4)　690-695　2011/07

DOI： 10.1520/JTE103132 　

ISSN： 0090-3973

eISSN： 1945-7553
Electric field dependence of the mode I energy release rate in single-edge cracked piezoelectric ceramics: effect due to polarization switching/dielectric breakdown Peer-reviewed

Yasuhide Shindo, Fumio Narita, Takuya Matsuda

ACTA MECHANICA　219　(1-2)　129-143　2011/06

DOI： 10.1007/s00707-011-0445-7 　

ISSN： 0001-5970
Electromechanical Response of Multilayer Piezoelectric Actuators for Fuel Injectors from Room to Cryogenic Temperatures Peer-reviewed

Y. Shindo, F. Narita, K. Sato, T. Sasakura

Proceedings of the Third International Conference on Heterogeneous Material Mechanics, EDITORS Jinghong Fan, Junqian Zhang, Haibo Chen, Zhaohui Jin　295-502　2011/06
Evaluation of electromechanical properties and field concentrations near electrodes in piezoelectric thick films for MEMS mirrors by simulations and tests Peer-reviewed

Fumio Narita, Yasuhide Shindo, Koji Sato

COMPUTERS & STRUCTURES　89　(11-12)　1077-1085　2011/06

DOI： 10.1016/j.compstruc.2010.12.008 　

ISSN： 0045-7949

eISSN： 1879-2243
Effect of Electric Field on the Response of Clamped-Free Magnetostrictive/Piezoelectric/Magnetostrictive Laminates Invited Peer-reviewed

K. Mori, F. Narita, Y. Shindo

Computers, Materials & Continua　23　(3)　187-199　2011/05
Electromechanical Response of 1-3 Piezoelectric/Polymer Composites under DC and AC Electric Fields Invited Peer-reviewed

Y. Shindo, F. Narita, T. Watanabe

AES Technical Reviews International Journals, Part D: International Journal of Reliability and Safety of Engineering Systems and Structures　1　(1)　23-30　2011/03
Cryogenic delamination growth in woven glass/epoxy composite laminates under mixed-mode I/II fatigue loading Peer-reviewed

Yasuhide Shindo, Masaya Miura, Tomo Takeda, Nozomi Saito, Fumio Narita

COMPOSITES SCIENCE AND TECHNOLOGY　71　(5)　647-652　2011/03

DOI： 10.1016/j.compscitech.2011.01.006 　

ISSN： 0266-3538
Effects of electric field and poling on fatigue behavior of PZT ceramics with single-edge crack by three-point bending

Yasuhide Shindo, Fumio Narita

IUTAM Bookseries　24　21-31　2011
Publisher: Springer Verlag
DOI： 10.1007/978-90-481-9887-0_3 　

ISSN： 1875-3507
Damage Development in Hybrid Composite Laminates under Three-point Bending at Cryogenic Temperatures Peer-reviewed

Masaya Miura, Yasuhide Shindo, Tomo Takeda, Fumio Narita

ADVANCES IN FRACTURE AND DAMAGE MECHANICS IX　452-453　565-568　2011

DOI： 10.4028/www.scientific.net/KEM.452-453.565 　

ISSN： 1013-9826
NUMERICAL AND EXPERIMENTAL EVALUATION OF CRYOGENIC TENSILE STRENGTH OF WOVEN FABRIC-REINFORCED GLASS/EPOXY COMPOSITES USING OPEN HOLE SPECIMENS Invited Peer-reviewed

Yasuhide Shindo, Shinya Watanabe, Tomo Takeda, Fumio Narita, Takuya Matsuda, Satoru Yamaki

JOURNAL OF MECHANICS OF MATERIALS AND STRUCTURES　6　(1-4)　545-556　2011/01

DOI： 10.2140/jomms.2011.6.545 　

ISSN： 1559-3959
Electromechanical Filed Concentrations and Polarization Switching Due to Interdigitated Electrodes in Piezoelectric Macro-Fiber Composites under Tension Peer-reviewed

Fumio Narita, Yasuhide Shindo, Koji Sato, Tomo Takeda

BEHAVIOR AND MECHANICS OF MULTIFUNCTIONAL MATERIALS AND COMPOSITES 2011　7978　79781T-1-79781T-6　2011

DOI： 10.1117/12.880044 　

ISSN： 0277-786X
Effect of damage on the interlaminar shear properties of hybrid composite laminates at cryogenic temperatures Peer-reviewed

Masaya Miura, Yasuhide Shindo, Tomo Takeda, Fumio Narita

COMPOSITE STRUCTURES　93　(1)　124-131　2010/12

DOI： 10.1016/j.compstruct.2010.06.008 　

ISSN： 0263-8223
Tensile and Compressive Behavior of Multi-Walled Carbon Nanotube/Polymer Composites Peer-reviewed

T. Takeda, Y. Kuronuma, Y. Shindo, F. Narita

Proceedings of the Second Asian Conference on Mechanics of Functional Materials and Structures, Edited by Cun-Fa Gao and Yong-Jian Wang　425-528　2010/10
Tensile Strength Determination for Woven Glass/Epoxy Composite Laminates at Cryogenic Temperatures Using the Open Hole Specimens Peer-reviewed

Y. Shindo, S. Watanabe, T. Takeda, F. Narita, T. Matsuda, S. Yamaki

Proceedings of the Ninth China-Japan Joint Conference on Composite Materials, Edited by Qingqing Ni, Jiang Liu　67-70　2010/09
Cryomechanics of Structural Alloys for Superconducting Device Applications Peer-reviewed

Y. Shindo, T. Takeda, F. Narita

AES Technical Reviews Journals, Part B: International Journal of Advances in Mechanics and Applications of Industrial Materials　1　(1)　41-47　2010/08
Dynamic characteristics and electromechanical fields of 1-3 piezoelectric/polymer composites under AC electric fields Peer-reviewed

Fumio Narita, Yasuhide Shindo, Taiki Watanabe

SMART MATERIALS & STRUCTURES　19　(7)　075004　2010/07

DOI： 10.1088/0964-1726/19/7/075004 　

ISSN： 0964-1726
Nonlinear electromechanical fields and localized polarization switching of 1-3 piezoelectric/polymer composites Peer-reviewed

Yasuhide Shindo, Fumio Narita, Taiki Watanabe

EUROPEAN JOURNAL OF MECHANICS A-SOLIDS　29　(4)　647-653　2010/07

DOI： 10.1016/j.euromechsol.2010.03.009 　

ISSN： 0997-7538
Electromagneto-mechanical fields of giant magnetostrictive/piezoelectric laminates Peer-reviewed

Yasuhide Shindo, Kotaro Mori, Fumio Narita

ACTA MECHANICA　212　(3-4)　253-261　2010/07

DOI： 10.1007/s00707-009-0259-z 　

ISSN： 0001-5970
Singular Stress Fields for Transverse Cracks in Multi-Layer Satin Woven CFRP Composite Laminates under Cryogenic Conditions Peer-reviewed

S. Watanabe, Y. Shindo, T. Takeda, F. Narita

Advances in Theoretical and Applied Mechanics　3　(8)　349-367　2010/07
Progressive Damage Response of Hybrid Composite Laminates under Three-Point Short Beam Shear Loading at Cryogenic Temperatures Peer-reviewed

M. Miura, Y. Shindo, T. Takeda, F. Narita

Proceedings of the 16th US National Congress of Theoretical and Applied Mechanics　755 (2 pages)　2010/07
Fatigue Crack Growth Behavior of CNT-Based Polymer Composites Peer-reviewed

Y. Kuronuma, Y. Shindo, T. Takeda, F. Narita

Multiscaling of Synthetic and Natural Systems with Self-Adaptive Capability, Editors: G. C. Sih and C. K. Chao　117-120　2010/06
Effect of Electric Field on the Bending Response of Magnetostrictive/Piezoelectric Laminated Composites Peer-reviewed

K. Mori, F. Narita, Y. Shindo

ACMA 2010 Abstracts and CD-ROM Proceedings, Editors: M. Karama, A. Menou, A. Moudden and A. El Hami　34 (6pages)　2010/05
Electric Delayed Fracture and Localized Polarization Switching of Cracked Piezoelectric Ceramics in Three-point Bending Peer-reviewed

Fumio Narita, Yasuhide Shindo, Mitsuru Hirama

INTERNATIONAL JOURNAL OF DAMAGE MECHANICS　19　(3)　285-300　2010/04

DOI： 10.1177/1056789509103642 　

ISSN： 1056-7895
CRYOGENIC FRACTURE BEHAVIOR OF METASTABLE AUSTENITIC STAINLESS STEEL IN A HIGH MAGNETIC FIELD Peer-reviewed

Y. Shindo, F. Narita, M. Suzuki, I. Shindo

STRENGTH OF MATERIALS　42　(2)　221-225　2010/03

DOI： 10.1007/s11223-010-9210-8 　

ISSN： 0039-2316
Magnetic Field on Stress Intensification in Soft Ferromagnetic Materials Peer-reviewed

Y. Shindo, I. Shindo, F. Narita

Particle and Continuum Aspects of Mesomechanics　739-747　2010/02/04
Publisher: wiley
DOI： 10.1002/9780470610794.ch76 　
Fracture behaviour of cracked carbon nanotube-based polymer composites: Experiments and finite element simulations Peer-reviewed

Y. Kuronuma, Y. Shindo, T. Takeda, F. Narita

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES　33　(2)　87-93　2010/02

DOI： 10.1111/j.1460-2695.2009.01419.x 　

ISSN： 8756-758X
T0101-5-3 Fracture Behavior of Carbon Nanotube-based Polymer Composites

KURONUMA Yu, SHINDO Yasuhide, TAKEDA Tomo, NARITA Fumio

The proceedings of the JSME annual meeting　2010　51-52　2010
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2010.8.0_51 　

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This paper studies the fracture behavior of carbon nanotube (CNT)-based polymer composites by a combined numerical-experimental approach. Tensile tests were conducted on single-edge cracked plate specimens of CNT/polycarbonate composites at room temperature and liquid nitrogen temperature (77 K), and the critical loads for fracture instabilities were determined. Elastic-plastic finite element simulations of the tests were then performed to evaluate the J-integrals corresponding to the experimentally determined critical loads. Scanning electron microscopy (SEM) examinations were also made on the specimen fracture surfaces, and the fracture mechanisms of the CNT-based composites were discussed.
T0101-2-3 Detection and Response Characteristics of Giant Magnetostrictive/Piezoelectric Laminated Devices under Electromagnetic Fields

NARITA Fumio, MORI Kotaro, SHINDO Yasuhide

The proceedings of the JSME annual meeting　2010　17-18　2010
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2010.8.0_17 　

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This work presents the nonlinear bending response of magnetostrictive/piezoelectric laminated devices under electromagnetic fields both numerically and experimentally. The devices are fabricated using thin Terfenol-D and PZT layers. The magnetostriction of the Terfenol-D layer bonded to the PZT layer is measured, and a nonlinear finite element analysis is performed to evaluate the second-order magnetoelastic constants in Terfenol-D layer using measured data. The deflection, internal stresses and induced voltage/magnetic field for the laminated devices under magnetic/electric fields are then discussed in detail.
Bending Response of Carbon Nanotube-Based Polymer Composites at Cryogenic Temperatures Peer-reviewed

Y. Kuronuma, Y. Shindo, Y. Mito, T. Takeda, F. Narita

Advances in Cryogenic Engineering　56　47-54　2010

DOI： 10.1063/1.3402332 　
Interlaminar shear properties of composite insulation systems for fusion magnets at cryogenic temperatures Peer-reviewed

Yasuhide Shindo, Tomo Takeda, Fumio Narita, Masaya Miura, Shinya Watanabe, Norikiyo Koizumi, Akira Idesaki, Kiyoshi Okuno

CRYOGENICS　50　(1)　36-42　2010/01

DOI： 10.1016/j.cryogenics.2009.10.006 　

ISSN： 0011-2275
Bending Response of Carbon Nanotube-based Polymer Composites at Cryogenic Temperatures Peer-reviewed

Y. Kuronuma, Y. Shindo, Y. Mito, T. Takeda, F. Narita

Advances in Cryogenic Engineering　56　47-54　2010/01

DOI： 10.1063/1.3402332 　
Nonlinear bending response of Terfenol-D/PZT laminated devices under electromagnetic fields Peer-reviewed

Kotaro Mori, Fumio Narita, Yasuhide Shindo

BEHAVIOR AND MECHANICS OF MULTIFUNCTIONAL MATERIALS AND COMPOSITES 2010　7644　764424-1-764424-8　2010

DOI： 10.1117/12.846400 　

ISSN： 0277-786X
Fatigue Crack Propagation in Three-Point Bending Piezoceramics under Electromechanical Loading Invited Peer-reviewed

Y. Shindo, F. Narita, M. Hirama

AES Technical Reviews Journals, Part B: International Journal of Advances in Mechanics and Applications of Industrial Materials　1　(1)　11-21　2009/10
Delamination growth mechanisms in woven glass fiber reinforced polymer composites under Mode II fatigue loading at cryogenic temperatures Peer-reviewed

Yasuhide Shindo, Tomo Takeda, Fumio Narita, Nozomi Saito, Shinya Watanabe, Kazuaki Sanada

COMPOSITES SCIENCE AND TECHNOLOGY　69　(11-12)　1904-1911　2009/09

DOI： 10.1016/j.compscitech.2009.04.010 　

ISSN： 0266-3538
Electromechanical field concentrations near the electrode tip in partially poled multilayer piezo-film actuators Peer-reviewed

Yasuhide Shindo, Fumio Narita, Mitsuru Hirama

SMART MATERIALS & STRUCTURES　18　(8)　085020　2009/08

DOI： 10.1088/0964-1726/18/8/085020 　

ISSN： 0964-1726
Fatigue Crack Growth Behavior of Metastable Austenitic Stainless Steel in Cryogenic High Magnetic Field Environments Peer-reviewed

Yasuhide Shindo, Tomo Takeda, Masato Suzuki, Fumio Narita

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE　40A　(8)　1863-1867　2009/08

DOI： 10.1007/s11661-009-9876-3 　

ISSN： 1073-5623
Mode III fatigue delamination growth of glass fiber reinforced polymer woven laminates at cryogenic temperatures Peer-reviewed

Masaya Miura, Yasuhide Shindo, Fumio Narita, Shinya Watanabe, Masato Suzuki

CRYOGENICS　49　(8)　407-412　2009/08

DOI： 10.1016/j.cryogenics.2009.05.004 　

ISSN： 0011-2275
Mode I Energy Release Rate in Cracked Piezoelectric Ceramics under Electric Fields Peer-reviewed

Y. Shindo, F. Narita

Proceedings of AES-TEMA’2009 International Conference　35-41　2009/07
Cryomechanics of Structural Alloys for Superconducting Device Applications Invited Peer-reviewed

Y. Shindo, T. Takeda, F. Narita

Proceedings of AES-TEMA’2009 International Conference　319-320　2009/07
Delayed Fracture of Cracked Piezoelectric Ceramics under Electromechanical Loading in Three-Point Bending Peer-reviewed

Y. Shindo, F. Narita, M. Hirama

Proceedings, The 12th International Conference on Fracture　T42.011　2009/07
Thermal-mechanical Analysis of Satin Weave CFRP Composites with Cracks at Cryogenic Temperatures Peer-reviewed

Shinya Watanabe, Yasuhide Shindo, Fumio Narita, Tomo Takeda

JOURNAL OF REINFORCED PLASTICS AND COMPOSITES　28　(11)　1319-1337　2009/06

DOI： 10.1177/0731684408089133 　

ISSN： 0731-6844
NONLINEAR BENDING RESPONSE OF GIANT MAGNETOSTRICTIVE LAMINATED ACTUATORS IN MAGNETIC FIELDS Invited Peer-reviewed

Yasuhide Shindo, Fumio Narita, Kotaro Mori, Tasuku Nakamura

JOURNAL OF MECHANICS OF MATERIALS AND STRUCTURES　4　(5)　941-949　2009/05

DOI： 10.2140/jomms.2009.4.941 　

ISSN： 1559-3959
DYNAMIC FATIGUE OF CRACKED PIEZOELECTRIC CERAMICS UNDER ELECTROMECHANICAL LOADING: THREE-POINT BENDING TEST AND FINITE ELEMENT ANALYSIS Peer-reviewed

Yasuhide Shindo, Fumio Narita, Mitsuru Hirama

JOURNAL OF MECHANICS OF MATERIALS AND STRUCTURES　4　(4)　719-729　2009/04

DOI： 10.2140/jomms.2009.4.719 　

ISSN： 1559-3959
Tensile Characterization of Carbon Nanotube-Reinforced Polymer Composites at Cryogenic Temperatures: Experimens and Multiscale Simulations Peer-reviewed

Tomo Takeda, Yasuhide Shindo, Furnio Narita, Yuya Mito

MATERIALS TRANSACTIONS　50　(3)　436-445　2009/03

DOI： 10.2320/matertrans.MBW200817 　

ISSN： 1345-9678

eISSN： 1347-5320
Effect of the electrical boundary condition at the crack face on the mode I energy release rate in piezoelectric ceramics Peer-reviewed

Yasuhide Shindo, Fumio Narita, Mitsuru Hirama

APPLIED PHYSICS LETTERS　94　(8)　081902　2009/02

DOI： 10.1063/1.3088855 　

ISSN： 0003-6951
T0101-3-1 Electromagneto-mechanical fields of giant magnetostrictive/piezoelectric laminated devices

MORI Kotaro, NARITA Fumio, SHINDO Yasuhide

The proceedings of the JSME annual meeting　2009　21-22　2009
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2009.8.0_21 　

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This paper presents the nonlinear electromagneto-mechanical behavior of magnetostrictive/piezoelectric laminated sensors and actuators under magnetic fields both numerically and experimentally. The devices are fabricated using thin Terfenol-D and PZT layers, and the magnetostriction of the devices is measured. A nonlinear finite element analysis is also employed to evaluate the contribution of magnetic domain switching to the second-order magnetoelastic constants in Terfenol-D layer bonded to the PZT layer, and the nonlinear displacement, internal stresses and induced voltage for the magnetostrictive/piezoelectric laminated devices under magnetic fields are discussed.
T0101-2-5 Nonlinear Electromechanical Fields and Localized Polarization Switching of 1-3 Piezoelectric/Polymer Composites

WATANABE Taiki, SHINDO Yasuhide, NARITA Fumio

The proceedings of the JSME annual meeting　2009　19-20　2009
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2009.8.0_19 　

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This work deals with the nonlinear electromechanical response of 1-3 piezocomposites. The composites contain square or circular piezoelectric rods in an epoxy matrix. Experiments were performed to measure the displacement versus electric field curves. Three dimensional finite element analysis was also conducted to study the electromechanical fields in the 1-3 piezocomposites by introducing a model for polarization switching. Comparison was then made between numerical results and experimental data.
Dynamic Electromechanical Response and Self-Sensing of Functionally Graded Piezoelectric Cantilever Transducers Peer-reviewed

Yasuhide Shindo, Fumio Narita, Jun Nakagawa

JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES　20　(1)　119-126　2009/01

DOI： 10.1177/1045389X08090115 　

ISSN： 1045-389X
Cryogenic Behavior of Cracks in Satin Woven CFRP Laminates under Tensile Loading Peer-reviewed

S. Watanabe, Y. Shindo, T. Takeda, F. Narita, K. Sanada

JSME Journal of Solid Mechanics and Materials Engineering　3　(1)　22-37　2009/01
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jmmp.3.22 　

ISSN： 1880-9871

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The objective of this research is to investigate the crack behavior in five harness satin woven carbon fiber reinforced polymer (CFRP) composite laminates with temperature-dependent material properties under tension at cryogenic temperatures. A situation of generalized plane strain is considered, and cracks are assumed to have occurred in the transverse fiber bundles. Also, both cases where the tips of the cracks are located in the fiber bundles or at the interfaces between two fiber bundles are treated, and a finite element technique utilizing special singular elements is used to obtain the stress intensity factors at the tips of the transverse cracks in two-layer woven CFRP laminates. The numerical results are then discussed in detail.
Effect of magnetic field on the bending response of magnetostrictive/ piezoelectric laminated actuators Peer-reviewed

Fumio Narita, Yasuhide Shindo, Kotaro Mori

Proceedings of SPIE - The International Society for Optical Engineering　7289　72891V　2009

DOI： 10.1117/12.815275 　

ISSN： 0277-786X
Electroelastic Wave Scattering in a Cracked Dielectric Polymer under a Uniform Electric Field Peer-reviewed

Yasuhide Shindo, Fumio Narita

BOUNDARY VALUE PROBLEMS　2009　949124　2009

DOI： 10.1155/2009/949124 　

ISSN： 1687-2770
Nonlinear Dynamic Bending and Self-sensing of Clamped-Clamped Functionally Graded Piezoelectric Transducers under AC Voltage Invited Peer-reviewed

Yasuhide Shindo, Fumio Narita, Jun Nakagawa

MECHANICS OF ADVANCED MATERIALS AND STRUCTURES　16　(7)　536-541　2009

DOI： 10.1080/15376490903133400 　

ISSN： 1537-6494
Mixed-mode interlaminar fracture and damage characterization in woven fabric-reinforced glass/epoxy composite laminates at cryogenic temperatures using the finite element and improved test methods Peer-reviewed

Yasuhide Shindo, Susumu Takahashi, Torno Takeda, Furnio Narita, Shinya Watanabe

ENGINEERING FRACTURE MECHANICS　75　(18)　5101-5112　2008/12

DOI： 10.1016/j.engfracmech.2008.07.009 　

ISSN： 0013-7944
Interfacial Damage Effect on the Cryogenic Mechanical Response of Carbon Nanotube-Based Composites under Bending Peer-reviewed

Y. Shindo, Y. Mito, T. Takeda, Y. Kuronuma, F. Narita

Advances in Theoretical and Applied Mechanics　1　(8)　361-377　2008/12
Scattering of elastic waves by a diamond shaped inclusion with cracks Peer-reviewed

Yasuhide Shindo, Tasuku Nakamura, Fumio Narita

ACTA MECHANICA　200　(3-4)　239-246　2008/10

DOI： 10.1007/s00707-008-0011-0 　

ISSN： 0001-5970
Nonlinear Dynamic Response and Self-Sensing of Functionally Graded Piezoelectric Transducers Peer-reviewed

F. Narita, J. Nakagawa, Y. Shindo

XXII International Congress of Theoretical and Applied Mechanics CD-ROM Proceedings, Edited by J. Denier, M. D. Finn and T. Mattner　10429　2008/08
Dynamic Fatigue Behavior of Cracked Piezoelectric Ceramics in Three-Point Bending under Electromechanical Loading Peer-reviewed

Y. Shindo, F. Narita, M. Hirama

XXII International Congress of Theoretical and Applied Mechanics CD-ROM Proceedings, Edited by J. Denier, M. D. Finn and T. Mattner　11021　2008/08
Transverse Crack Behavior in Satin Woven Carbon Fiber Reinforced/Epoxy Composite Laminates at Cryogenic Temperatures Peer-reviewed

S. Watanabe, Y. Shindo, T. Takeda, F. Narita

XXII International Congress of Theoretical and Applied Mechanics CD-ROM Proceedings, Edited by J. Denier, M. D. Finn and T. Mattner　11576　2008/08
The influence of magnetic field on the fracture toughness of soft ferromagnetic materials Peer-reviewed

Yasuhide Shindo, Itaru Shindo, Fumio Narita

ENGINEERING FRACTURE MECHANICS　75　(10)　3010-3019　2008/07

DOI： 10.1016/j.engfracmech.2007.12.015 　

ISSN： 0013-7944
Cryogenic mechanical response of multilayer satin weave CFRP composites with cracks Peer-reviewed

S. Watanabe, Y. Shindo, T. Takeda, F. Narita

MECHANICS OF COMPOSITE MATERIALS　44　(4)　331-340　2008/07

DOI： 10.1007/s11029-008-9025-x 　

ISSN： 0191-5665
Mode II interlaminar fracture and damage evaluation of GFRP woven laminates at cryogenic temperatures using the 4ENF specimen Peer-reviewed

Yasuhide Shindo, Takashi Sato, Fumio Narita, Kazuaki Sanada

JOURNAL OF COMPOSITE MATERIALS　42　(11)　1089-1101　2008/06

DOI： 10.1177/0021998308090451 　

ISSN： 0021-9983
Interlaminar Fracture and Damage in Woven GFRP Laminates at Cryogenic Temperatures Peer-reviewed

Y. Shindo, T. Takeda, F. Narita

Advances in Heterogeneous Material Mechanics 2008　2008/06
Scattering of elastic waves by a star shaped inclusion Peer-reviewed

Yasuhide Shindo, Fumio Narita, Tasuku Nakamura

ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK　88　(3)　191-198　2008/03

DOI： 10.1002/zamm.200700088 　

ISSN： 0044-2267
1234 Dynamic Electromechanical Response and Self-Sensing of Functionally Graded Piezoelectric Cantilever Transducers

NARITA Fumio, SHINDO Yasuhide

The proceedings of the JSME annual meeting　2008　313-314　2008
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2008.6.0_313 　

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This paper studies the activity and sensitivity of functionally graded piezoelectric cantilever transducers under electromechanical loading through numerical and experimental characterizations. A phenomenological model of domain wall motion in alternating current (AC) electric fields is used, and a nonlinear three-dimensional finite element method is employed to simulate the dynamic response of functionally graded piezoelectric cantilever transducers. The effects of AC electric field amplitude and frequency, number of layers, and property gradation on the output voltage, deflection and internal stresses of the transducers are examined. Experimental results, which verify the model, are also presented using functionally graded piezoelectric bimorphs.
Thermal-Mechanical Response of Cracked Satin Weave CFRP Composites at Cryogenic Temperatures Peer-reviewed

S. Watanabe, Y. Shindo, F. Narita, T. Takeda

Advances in Cryogenic Engineering　54　227-234　2008

DOI： 10.1063/1.2900350 　
Effect of Magnetic Fields on the Bending Behavior of Giant Magnetostrictive Laminated Actuators Peer-reviewed

Y. Shindo, F. Narita, T. Nakamura

Applied Mechanics in the Americas　12　13-16　2008/01
Thermal-Mechanical Response of Cracked Satin Weave CFRP Composites at Cryogenic Temperatures Peer-reviewed

S. Watanabe, Y. Shindo, F. Narita, T. Takeda

Advances in Cryogenic Engineering　54　227-234　2008/01

DOI： 10.1063/1.2900350 　
Effects of electric field and poling on the response of multilayer piezoelectric film actuators with partial electrodes Peer-reviewed

Yasuhide Shindo, Furnio Narita, Mitsuru Hirama

BEHAVIOR AND MECHANICS OF MULTIFUNCTIONAL AND COMPOSITE MATERIALS 2008　6929　692927-1-692927-8　2008

DOI： 10.1117/12.775427 　

ISSN： 0277-786X
The application of the boundary element method to the problem of wave diffraction from a diamond shaped inclusion Invited Peer-reviewed

Yasuhide Shindo, Tasuku Nakamura, Fumio Narita

Open Mechanics Journal　2　(1)　62-66　2008

DOI： 10.2174/1874158400802010062 　

ISSN： 1874-1584
Nonlinear bending characteristics and sound pressure level of functionally graded piezoelectric actuators under AC electric fields: simulation and experiment Peer-reviewed

Yasuhide Shindo, Fumio Narita, Jun Nakagawa

SMART MATERIALS & STRUCTURES　16　(6)　2296-2301　2007/12

DOI： 10.1088/0964-1726/16/6/032 　

ISSN： 0964-1726
Delayed Fracture of the Piezoelectric Ceramics under Electric Fields in Three-Point Bending Peer-reviewed

F. Narita, Y. Shindo, M. Hirama

Proceedings of IMECE2007　2007　41165-1-41165-10　2007/11
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2007.1.0_205 　

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2007 ASME International Mechanical Engineering Congress and Exposition (November 11-15, 2007, Seattle, Washington, U.S.A.)
Electroelastic intensification and domain switching near a plane strain crack in a rectangular piezoelectric material Invited Peer-reviewed

Yasuhide Shindo, Fumio Narita, Fumitoshi Saito

JOURNAL OF MECHANICS OF MATERIALS AND STRUCTURES　2　(8)　1525-1540　2007/10

DOI： 10.2140/jomms.2007.2.1525 　

ISSN： 1559-3959
Electroelastic response of a flat annular crack in a piezoelectric fiber surrounded by an elastic medium Peer-reviewed

Y. Shindo, S. Lin, F. Narita

JOURNAL OF ENGINEERING MATHEMATICS　59　(1)　83-97　2007/09

DOI： 10.1007/s10665-006-9072-z 　

ISSN： 0022-0833
Cyclic fatigue crack growth in three-point bending PZT ceramics under electromechanical loading Peer-reviewed

Fumio Narita, Yasuhide Shindo, Fumitoshi Saito

JOURNAL OF THE AMERICAN CERAMIC SOCIETY　90　(8)　2517-2524　2007/08

DOI： 10.1111/j.1551-2916.2007.01774.x 　

ISSN： 0002-7820
Characteristics of Detection and Response in Functionally Graded Piezoelectric Sensors and Actuators Invited Peer-reviewed

Y. Shindo, F. Narita, J. Nakagawa, Y. Mito

International Journal of Advances in Mechanics and Applications of Industrial Materials　1　(1)　79-86　2007/08
Electroelastic field concentrations and polarization switching induced by circular electrode at the interface of piezoelectric disk composites Peer-reviewed

Fumio Narita, Yasuhide Shindo, Masaru Mikami

EUROPEAN JOURNAL OF MECHANICS A-SOLIDS　26　(3)　394-404　2007/05

DOI： 10.1016/j.euromechsol.2006.07.001 　

ISSN： 0997-7538
Mixed-Mode Interlaminar Fracture and Damage of Woven GFRP Laminates at Cryogenic Temperatures Peer-reviewed

th AIAA/ASME, ASCE/AHS/ASC Structures, Structural Dynamics, Materials Conference, Composite Materials for, Cryogenic Launch Applications (A, Waikiki, Hawaii, U

Conference Papers, AIAA2007　2408-1-2408-10　2007/04
Axially poled solid cylinder under tension with a flat annular crack Peer-reviewed

Fumio Narita, Yasuhide Shindo, Sen Lin

ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK　87　(4)　278-289　2007/04

DOI： 10.1002/zamm.200610301 　

ISSN： 0044-2267
Effect of magnetic field on fatigue crack propagation of single-edge cracked soft ferromagnetic specimens under mode I loading Peer-reviewed

Yasuhide Shindo, Itaru Shindo, Fumio Narita

JOURNAL OF TESTING AND EVALUATION　35　(2)　151-156　2007/03

ISSN： 0090-3973
Bending Behavior of Functionally Graded Piezoelectric Laminated Actuators under Electric Fields Peer-reviewed

Y. Shindo, F. Narita

Key Engineering Materials　336/338　2619-2623　2007/01
Testing and analysis of high frequency electroelastic characteristics of piezoelectric transformers Peer-reviewed

F. Narita, Y. Shindo, F. Saito, M. Mikami

ARCHIVES OF MECHANICS　59　(2)　119-131　2007

ISSN： 0373-2029
Fatigue of cracked PZT ceramics in three-point bending under electric fields Peer-reviewed

Fumio Narita, Yasuhide Shindo, Fumitoshi Saito

BEHAVIOR AND MECHANICS OF MULTIFUNCTIONAL AND COMPOSITE MATERIALS 2007　6526　65262O-1-65262O-8　2007

DOI： 10.1117/12.713966 　

ISSN： 0277-786X
Static fatigue behavior of cracked piezoelectric ceramics in three-point bending under electric fields Peer-reviewed

Yasuhide Shindo, Fumio Narita, Fumitoshi Saito

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY　27　(10)　3135-3140　2007

DOI： 10.1016/j.jeurceramsoc.2006.11.078 　

ISSN： 0955-2219
An experimental-computational approach to the investigation of tensile properties and damage evolution in woven GFRP laminates at cryogenic temperatures Peer-reviewed

Yasuhide Shindo, Satoru Takano, Fumio Narita, Katsumi Horiguchi

MECHANICS OF ADVANCED MATERIALS AND STRUCTURES　14　(5)　329-346　2007

DOI： 10.1080/15376490600910704 　

ISSN： 1537-6494
Nonlinear dynamic deflection and sound level in functionally graded piezoelectric actuators under AC electric fields Peer-reviewed

Yasuhide Shindo, Furnio Narita, Jun Nakagawa

PROCEEDINGS OF THE 5TH INTERNATIONAL CONFERENCE ON NONLINEAR MECHANICS　1628-1632　2007
Mode I crack growth rate of a ferromagnetic elastic strip in a uniform magnetic field Peer-reviewed

Yasuhide Shindo, Fumio Narita, Katsumi Horiguchi, Tetsu Komatsu

ACTA MATERIALIA　54　(19)　5115-5122　2006/11

DOI： 10.1016/j.actamat.2006.06.048 　

ISSN： 1359-6454
Tensile and damage behavior of plain weave glass/epoxy composites at cryogenic temperatures Peer-reviewed

Y. Shindo, S. Takano, F. Narita, K. Horiguchi

FUSION ENGINEERING AND DESIGN　81　(20-22)　2479-2483　2006/11

DOI： 10.1016/j.fusengdes.2006.07.059 　

ISSN： 0920-3796
Analysis of mode II interlaminar fracture and damage behavior in end notched flexure testing of GFRP woven laminates at cryogenic temperatures Peer-reviewed

Y. Shindo, F. Narita, T. Sato

ACTA MECHANICA　187　(1-4)　231-240　2006/11

DOI： 10.1007/s00707-006-0357-0 　

ISSN： 0001-5970
Mode I fatigue delamination growth in GFRP woven laminates at low temperatures Peer-reviewed

Yasuhide Shindo, Akihiro Inamoto, Fumio Narita, Katsumi Horiguchi

ENGINEERING FRACTURE MECHANICS　73　(14)　2080-2090　2006/09

DOI： 10.1016/j.engfracmech.2006.03.015 　

ISSN： 0013-7944
Mode III interlaminar fracture behavior of glass fiber reinforced polymer woven laminates at 293 to 4 k Peer-reviewed

Victor Rizov, Yasuhide Shindo, Katsumi Horiguchi, Fumio Narita

APPLIED COMPOSITE MATERIALS　13　(5)　287-304　2006/09

DOI： 10.1007/s10443-006-9008-9 　

ISSN： 0929-189X
Three-dimensional electroelastic analysis of functionally graded piezoelectric plate via state vector approach Peer-reviewed

Shisheng Fang, Yasuhide Shindo, Fumio Narita, Sen Lin

ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK　86　(8)　628-641　2006/08

DOI： 10.1002/zamm.200510270 　

ISSN： 0044-2267
Magnetoelastic analysis and tensile testing of a soft ferromagnetic strip with a single-edge crack Peer-reviewed

Yasuhide Shindo, Tetsu Komatsu, Fumio Narita, Katsumi Horiguchi

JOURNAL OF APPLIED PHYSICS　100　(3)　034513　2006/08

DOI： 10.1063/1.2222068 　

ISSN： 0021-8979
Nonlinear dynamic bending and domain wall motion in functionally graded piezoelectric actuators under AC electric fields: Simulation and experiment Peer-reviewed

Y Shindo, F Narita, M Mikami, F Saito

JSME INTERNATIONAL JOURNAL SERIES A-SOLID MECHANICS AND MATERIAL ENGINEERING　49　(2)　188-194　2006/04

DOI： 10.1299/jsmea.49.188 　

ISSN： 1344-7912
Magnetic stress intensity factor for an edge crack in a soft ferromagnetic elastic half-plane under tension Peer-reviewed

Y Shindo, T Komatsu, F Narita, K Horiguchi

ACTA MECHANICA　182　(3-4)　183-193　2006/04

DOI： 10.1007/s00707-005-295-2 　

ISSN： 0001-5970
318 Mode II interlaminar fracture and damage behavior of GFRP woven laminates at cryogenic temperatures

SATO Takashi, SHINDO Yasuhide, NARITA Fumio, SANADA Kazuaki

Proceedings of the 1992 Annual Meeting of JSME/MMD　2006　153-154　2006
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmezairiki.2006.0_153 　
3446 Mode I crack growth rate of a ferromagnetic elastic strip in a uniform magnetic field

SHINDO Yasuhide, NARITA Fumio, HORIGUCHI Katsumi

The proceedings of the JSME annual meeting　2006　603-604　2006
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2006.1.0_603 　

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The theory of ferromagnetic elastic materials of multidomain structure is applied to develop a crack growth rate equation of a finite crack in a soft ferromagnetic material under Mode I tensile loading and uniform magnetic field. The plane strain and plane stress problems are considered. Dugdale's assumption regarding the plastic zone in metals is applied to estimate the effect of yield around the crack tip. The accumulated plastic displacement criterion is used for developing a solution for the crack growth rate. Numerical values of crack growth rate are obtained for a soft ferromagnetic strip with a single-edge crack and the results are displayed graphically. Crack growth rate tests are also conducted on nickel-iron soft magnetic materials with a single-edge cracked plate specimen geometry in the bore of a superconducting magnet, and a comparison is made between numerical results and experimental data.
Tensile Behavior and Damage/Acoustic Emission Characteristics of Woven Glass Fiber Reinforced/Epoxy Composite Laminates at Cryogenic Temperatures Peer-reviewed

Y. Shindo, F. Narita, K. Horiguchi, S. Takano, T. Takeda, K. Sanada

Advances in Cryogenic Engineering　52　249-256　2006

DOI： 10.1063/1.2192358 　
Tensile Behavior and Damage/Acoustic Emission Characteristics of Woven Glass Fiber Reinforced/Epoxy Composite Laminates at Cryogenic Temperatures Peer-reviewed

Y. Shindo, F. Narita, K. Horiguchi, S. Takano, T. Takeda, K. Sanada

Advances in Cryogenic Engineering　52　249-256　2006

DOI： 10.1063/1.2192358 　
23. Electroelastic Intensification and Polarization Switching near Crack in Rectangular Piezoelectric Body Peer-reviewed

Y. Shindo, F. Narita, M. Mikami, S. Lin

Applied Mechanics in the Americas (Edited by Jeffrey W. Eischen, Guillermo Monsiváis Galindo)　11　91　2006/01
Electroelastic field concentrations and frequency properties of Rosen-type piezoelectric transformers Peer-reviewed

Fumio Narita, Yasuhide Shindo, Masaru Mikami

SMART STRUCTURES AND MATERIALS 2006: ACTIVE MATERIALS: BEHAVIOR AND MECHANICS　6170　617026　2006

DOI： 10.1117/12.657309 　

ISSN： 0277-786X
Analytical and experimental study of nonlinear bending response and domain wall motion in piezoelectric laminated actuators under ac electric fields Peer-reviewed

F Narita, Y Shindo, M Mikami

ACTA MATERIALIA　53　(17)　4523-4529　2005/10

DOI： 10.1016/j.actamat.2005.05.044 　

ISSN： 1359-6454
Deformation and progressive failure behavior of woven-fabric-reinforced glass/epoxy composite laminates under tensile loading at cryogenic temperatures Peer-reviewed

T Takeda, S Takano, Y Shindo, F Narita

COMPOSITES SCIENCE AND TECHNOLOGY　65　(11-12)　1691-1702　2005/09

DOI： 10.1016/j.compscitech.2005.02.009 　

ISSN： 0266-3538
Electroelastic fracture mechanics of piezoelectric layered composites Invited Peer-reviewed

Y Shindo, F Narita, M Mikami

JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES　16　(7-8)　573-582　2005/07

DOI： 10.1177/1045389X05048329 　

ISSN： 1045-389X
Bending and polarization switching of piezoelectric laminated actuators under electromechanical loading Peer-reviewed

F Narita, Y Shindo, K Hayashi

COMPUTERS & STRUCTURES　83　(15-16)　1164-1170　2005/06

DOI： 10.1016/j.compstruc.2004.08.025 　

ISSN： 0045-7949
Acoustic emission and fracture behavior of GFRP woven laminates at cryogenic temperatures Peer-reviewed

Y Shindo, M Sumikawa, F Narita, K Sanada

CRYOGENICS　45　(6)　439-449　2005/06

DOI： 10.1016/j.cryogenics.2005.03.002 　

ISSN： 0011-2275
Double torsion testing and finite element analysis for determining the electric fracture properties of piezoelectric ceramics Peer-reviewed

Y Shindo, F Narita, M Mikami

JOURNAL OF APPLIED PHYSICS　97　(11)　114109　2005/06

DOI： 10.1063/1.1925331 　

ISSN： 0021-8979
Dynamic Bending and Domain Wall Motion in Piezoelectric Laminated Actuators under AC Electric Fields Peer-reviewed

Y. Shindo, F. Narita, M. Mikami, K. Hayashi

Third MIT Conference on Computational Fluid and Solid Mechanics, Computational Fluid and Solid Mechanics 2005　3　488-491　2005/06
Electroelastic fracture mechanics analysis of central active piezoelectric transformer Peer-reviewed

F Narita, S Lin, Y Shindo

EUROPEAN JOURNAL OF MECHANICS A-SOLIDS　24　(3)　377-392　2005/05

DOI： 10.1016/j.euromechsol.2005.01.001 　

ISSN： 0997-7538
Characterization of Mode I fatigue crack growth in GFRP woven laminates at low temperatures Peer-reviewed

Y Shindo, A Inamoto, F Narita

ACTA MATERIALIA　53　(5)　1389-1396　2005/03

DOI： 10.1016/j.actamat.2004.11.032 　

ISSN： 1359-6454
Electric Fracture and Polarization Switching of Piezoelectric Ceramics: Experiment and Finite Element Simulation Peer-reviewed

M. Karaiwa, F. Narita, Y. Shindo

11th International Conference on Fracture, CD-ROM Proceedings　1179　2005/03
P54 Magnetoelastic Analysis and Tensile Testing of a Soft Ferromagnetic Strip with a Singe-Edge Crack

KOMATUS Tetsu, SHINDO Yasuhide, NARITA Fumio, HORIGUCHI Katsumi

Proceedings of the 1992 Annual Meeting of JSME/MMD　2005　531-532　2005
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmezairiki.2005.0_531 　
1733 Nonlinear Bending Behavior of Functionally Graded Piezoelectric Actuators under Electric Fields

NARITA Fumio, SHINDO Yasuhide, MIKAMI Masaru, SAITO Fumitoshi

The proceedings of the JSME annual meeting　2005　369-370　2005
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2005.1.0_369 　

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We present numerical and experimental results on the nonlinear bending behavior due to domain wall motion in functionally graded piezoelectric actuator under alternating current (ac) electric fields. A nonlinear finite element method is employed to analyze the dynamic response of functionally graded piezoelectric actuator. A phenomenological model of domain wall motion is used in computation, and the effects of ac electric field amplitude and frequency, number of layers, and property gradation on the deflection and internal stresses of the cantilever actuators are examined. Experimental results, which verify the model, are presented using a functionally graded bimorph. The numerical results agree very well with the experimental values.
Magnetic stress intensity factors for two symmetric edge cracks in a soft ferromagnetic elastic strip under tension Peer-reviewed

Y Shindo, D Sekiya, F Narita, K Horiguchi

JSME INTERNATIONAL JOURNAL SERIES A-SOLID MECHANICS AND MATERIAL ENGINEERING　48　(1)　7-13　2005/01

DOI： 10.1299/jsmea.48.7 　

ISSN： 1344-7912
Analysis of Mode I interlaminar fracture and damage behavior of GFRP woven laminates at cryogenic temperatures Peer-reviewed

M Sumikawa, Y Shindo, T Takeda, F Narita, S Takano, K Sanada

JOURNAL OF COMPOSITE MATERIALS　39　(22)　2053-2066　2005

DOI： 10.1177/0021998305052029 　

ISSN： 0021-9983
Three-dimensional thermoelastic analysis of cracked plain weave glass/epoxy composites at cryogenic temperatures Peer-reviewed

T Takeda, Y Shindo, F Narita

COMPOSITES SCIENCE AND TECHNOLOGY　64　(15)　2353-2362　2004/11

DOI： 10.1016/j.compscitech.2004.04.003 　

ISSN： 0266-3538
The Planar Crack Problem for a Dielectric Medium in a Uniform Electric Field Peer-reviewed

Y. Shindo, F. Narita

Archives of Mechanics　56　(6)　425-441　2004/11
Electroelastic effect induced by electrode embedded at the interface of two piezoelectric half-planes Peer-reviewed

F Narita, M Yoshida, Y Shindo

MECHANICS OF MATERIALS　36　(10)　999-1006　2004/10

DOI： 10.1016/j.mechmat.2003.04.003 　

ISSN： 0167-6636
Tensile testing and analysis of ferromagnetic elastic strip with a central crack in a uniform magnetic field Peer-reviewed

Y Shindo, D Sekiya, F Narita, K Hohiguchi

ACTA MATERIALIA　52　(15)　4677-4684　2004/09

DOI： 10.1016/j.actamat.2004.06.029 　

ISSN： 1359-6454
Finite Element Analysis of Fracture and Polarization Switching Behavior in Modified Small Punch Testing of Piezoelectric Ceramics Peer-reviewed

Y. Shindo, F. Narita, Y. Magara, M. Karaiwa

ICTAM04 Abstracts and CD-ROM Proceedings　256-257　2004/08
Analysis of Tensile Testing of a Soft Ferromagnetic Elastic Strip Containing a Central Crack under a Magnetic Field Peer-reviewed

D. Sekiya, Y. Shindo, F. Narita, K. Horiguchi

ICTAM04 Abstracts and CD-ROM Proceedings　262-263　2004/08
Three-Dimensional Thermoelastic Analysis of Plain Weave Glass/Epoxy Composites with Cracks at Cryogenic Temperatures Peer-reviewed

T. Takeda, Y. Shindo, F. Narita

ICTAM04 Abstracts and CD-ROM Proceedings　289-290　2004/08
Electroelastic Fields Concentrations and Polarization Switching by Circular Electrodes in Piezoelectric Disk Composites Peer-reviewed

F. Narita, Y. Shindo, M. Karaiwa

ICTAM04 Abstracts and CD-ROM Proceedings　295　2004/08
FRACTURE MECHANICS ANALYSIS OF MULTI-LAYER PLAIN WEAVE FABRIC LAMINATES WITH TRANSVERSE CRACKS AT CRYOGENIC TEMPERATURES Peer-reviewed

Tomo Takeda, Yasuhide Shindo, Fumio Narita

INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS　1　(1)　151-169　2004/06

DOI： 10.1142/S0219876204000046 　

ISSN： 0219-8762
Electroelastic field concentrations ahead of electrodes in multilayer piezoelectric actuators: experiment and finite element simulation Peer-reviewed

Y Shindo, M Yoshida, F Narita, K Horiguchi

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS　52　(5)　1109-1124　2004/05

DOI： 10.1016/j.jumps.2003.09.017 　

ISSN： 0022-5096
Finite element analysis of electric fracture properties in modified small punch testing of piezoceramic plates Peer-reviewed

Y Magara, F Narita, Y Shindo, M Karaiwa

JOURNAL OF APPLIED PHYSICS　95　(8)　4303-4309　2004/04

DOI： 10.1063/1.1682693 　

ISSN： 0021-8979
Theoretical and experimental determination of magnetic stress intensity factors of a crack in a double cantilever beam specimen Peer-reviewed

K Yoshimura, Y Shindo, K Horiguchi, F Narita

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES　27　(3)　213-218　2004/03

DOI： 10.1111/j.1460-2695.2004.00748.x 　

ISSN： 8756-758X
Stress intensity factors for woven glass/epoxy laminates with cracks at cryogenic temperatures Peer-reviewed

T Takeda, Y Shindo, F Narita, K Sanada

MECHANICS OF ADVANCED MATERIALS AND STRUCTURES　11　(2)　109-132　2004/03

DOI： 10.1080/15376490490277312 　

ISSN： 1537-6494
Dynamic antiplane shear of a circular piezoelectric fiber embedded in an elastic matrix with curved interface cracks Peer-reviewed

K Minamida, F Narita, Y Shindo

MECHANICS OF ADVANCED MATERIALS AND STRUCTURES　11　(2)　133-150　2004/03

DOI： 10.1080/15376490490277295 　

ISSN： 1537-6494
Evaluation of electric fracture properties of piezoelectric ceramics using finite element and double torsion test techniques

Yasuhide Shindo, Fumio Narita, Katsumi Horiguchi, Masaru Karaiwa, Keisuke Hayashi

Multiscaling in Applied Science and Emerging Technology, Fundamentals and Applications in Mesomechanics: Proceedings of the Sixth International Conference for Mesomechanics　293-299　2004
Electroelastic Fracture Mechanics Analysis and Polarization Switching of Piezoelectric Transformers

KARAIWA Masaru, NARITA Fumio, SHINDO Yasuhide

Proceedings of the 1992 Annual Meeting of JSME/MMD　2004　341-342　2004
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmezairiki.2004.0_341 　
Double Torsion Testing and Finite Element Analysis for Determining the Electric Fracture Properties o Piezoelctric Ceramics

KARAIWA Masaru, SHINDO Yasuhide, NARITA Fumio

The proceedings of the JSME annual meeting　2004　333-334　2004
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2004.1.0_333 　

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This paper presents the results of an experimental and numerical investigation in electric fracture behavior of composite PZT double torsion (DT) specimens. DT tests were conducted on a commercial piezoelectric ceramic bonded between two metals. Fracture loads under different electric fields were obtained from the experiment. Nonlinear three-dimensional finite element analysis was also employed to calculate the energy release rate for DT specimens based on the exact (permeable) and approximate (impermeable) crack models. The effects of applied electric field and polarization switching on the energy release rate are discussed, and the model predictions are compared with the results of the experiments.
Evaluation of Cryogenic Fracture and Damage Properties of GFRP Compact Tension Specimens

SHINDO Yasuhide, SUMIKAWA Mayumi, NARITA Fumio, SANADA Kazuaki, KUMAGAI Susumu

The proceedings of the JSME annual meeting　2004　349-350　2004
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2004.1.0_349 　

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This paper describes an experimental and analytical study on fracture and damage behavior of GFRP woven laminates at cryogenic temperatures. CT (compact tension) tests were carried out at room temperature, liquid nitrogen temperature (77 K) and liquid helium temperature (4 K) to evaluate the critical values of the fracture mechanics parameters. During the CT tests, AE (acoustic emission) method was implemented. AE signals can identify the critical load at which gross failure occurs. A FEA (finite element analysis) was also done to calculate the fracture mechanics parameters. The failure criteria (Hoffman criterion and maximum strain criterion) or the damage variable based on the continuum damage mechanics was incorporated into the model to interpret the experimental measurements and to study the damage distributions within the specimen. Several methods of calculating J-integral are discussed.
Tensile Deformation and Progressive Failure Behavior of Woven-Fabric GFRP Laminates at Cryogenic Temperatures

TAKEDA Tomo, TAAKNO Satoru, SHINDO Yasuhide, NARITA Fumio

The proceedings of the JSME annual meeting　2004　347-348　2004
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2004.1.0_347 　

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This paper focuses on understanding the deformation and progressive failure behavior of glass/epoxy plain weave fabric-reinforced laminates subjected to uniaxial tension load at cryogenic temperatures. Cryogenic tensile tests were conducted on the woven-fabric laminates, and the damage development during loading was characterized by AE (acoustic emission) measurements. A finite element methodology for progressive failure analysis of woven-fabric composite panels was also developed, and applied to simulate "knee" behavior in the stress-strain responses and damage behavior in the tensile test specimens. The effect of strain concentrations due to the fabric architecture on the failure strain of the material was considered by incorporating the SVF (strain variation factor) from meso-scale analysis of a woven-fabric composite unit into the macro-scale analysis of the specimens. A comparison was made between the finite element predictions and the experimental data, and the agreement is good.
Experimental and finite-element analysis of woven glass-cloth/epoxy laminate tensile specimen at room and low temperatures Peer-reviewed

S Kumagai, Y Shindo, K Horiguchi, F Narita

MECHANICS OF ADVANCED MATERIALS AND STRUCTURES　11　(1)　51-66　2004/01

DOI： 10.1080/15376490490257666 　

ISSN： 1537-6494
The Thermo-Mechanical Problem of Internal and Edge Cracks in Multi-Layered Woven GFRP Laminates at Cryogenic Temperatures Peer-reviewed

T. Takeda, Y. Shindo, F. Narita

Advances in Cryogenic Engineering　50　248-255　2004
The Thermo-Mechanical Problem of Internal and Edge Cracks in Multi-Layered Woven GFRP Laminates at Cryogenic Temperatures Peer-reviewed

T. Takeda, Y. Shindo, F. Narita

Advances in Cryogenic Engineering　50　248-255　2004
Electroelastic Fields Concentrations and Polarization Switching by Electrodes in Multilayer Piezoelectric Actuators Peer-reviewed

Y. Shindo, F. Narita, M. Yoshida, K. Horiguchi

Applied Mechanics in the Americas　10　2004/01
Tensile deformation and progressive failure behavior of woven-fabric gfrp laminates at cryogenic temperatures Peer-reviewed

Satoru Takano, Tomo Takeda, Yasuhide Shindo, Fumio Narita

American Society of Mechanical Engineers, Aerospace Division (Publication) AD　69　395-403　2004
Publisher: American Society of Mechanical Engineers (ASME)
DOI： 10.1115/IMECE2004-60906 　

ISSN： 0733-4230
Electroelastic field concentration by circular electrodes in piezoelectric ceramics Peer-reviewed

M Yoshida, F Narita, Y Shindo, M Karaiwa, K Horiguchi

SMART MATERIALS & STRUCTURES　12　(6)　972-978　2003/12

DOI： 10.1088/0964-1726/12/6/015 　

ISSN： 0964-1726
Cryogenic Mechanical Response of Multi-Layered Woven-Fabric Glass/Epoxy Laminates with Cracks Peer-reviewed

T. Takeda, Y. Shindo, F. Narita

Metals Materials And Processes　15　(3/4)　293-306　2003/12
Displacement and polarization switching properties of piezoelectric laminated actuators under bending Peer-reviewed

K Hayashi, Y Shindo, F Narita

JOURNAL OF APPLIED PHYSICS　94　(7)　4603-4607　2003/10

DOI： 10.1063/1.1603963 　

ISSN： 0021-8979
Electroelastic analysis of a piezoelectric cylindrical fiber with a penny-shaped crack embedded in a matrix Peer-reviewed

S Lin, F Narita, Y Shindo

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES　40　(19)　5157-5174　2003/09

DOI： 10.1016/S0020-7683(03)00261-0 　

ISSN： 0020-7683
Electric fracture and polarization switching properties of piezoelectric ceramic PZT studied by the modified small punch test Peer-reviewed

Y Shindo, F Narita, K Horiguchi, Y Magara, M Yoshida

ACTA MATERIALIA　51　(16)　4773-4782　2003/09

DOI： 10.1016/S1359-6454(03)00303-3 　

ISSN： 1359-6454
Electroelastic analysis of a penny-shaped crack in a piezoelectric ceramic under mode I loading Peer-reviewed

S Lin, F Narita, Y Shindo

MECHANICS RESEARCH COMMUNICATIONS　30　(4)　371-386　2003/07

DOI： 10.1016/S0093-6413(03)00031-4 　

ISSN： 0093-6413
Comparison of energy release rate and energy density criteria for a piezoelectric layered composite with a crack normal to interface Peer-reviewed

S Lin, F Narita, Y Shindo

THEORETICAL AND APPLIED FRACTURE MECHANICS　39　(3)　229-243　2003/05

DOI： 10.1016/S0167-8442(03)00004-1 　

ISSN： 0167-8442
Tensile Testing and Magnetoelastic Analysis of a Cracked Soft Ferromagnetic Plate

SEKIYA Daisuke, SHINDO Yasuhide, HORIGUCHI Katsumi, NARITA Fumio

Proceedings of the 1992 Annual Meeting of JSME/MMD　2003　777-778　2003
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmezairiki.2003.0_777 　
Displacement and Polarization Switching Properties of Piezoelectric Laminated Actuators Under Bending

HAYASHI Keisuke, NARITA Fumio, SHINDO Yasuhide

The proceedings of the JSME annual meeting　2003　167-168　2003
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2003.7.0_167 　

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The displacement and polarization switching properties of piezoelectric laminated actuators have been investigated theoretically, numerically and experimentally. A laminated beam theory solution is developed for the piezoceramic/metal/piezoceramic actuator, and the effects of electric fields on the displacements of the actuators are analyzed. A nonlinear three-dimensional finite element analysis is also employed. Bending tests are used to validate the numerical predictions, using laminated actuators made with PZT piezoelectric layers and Fe-48%Ni host material. Good agreement is obtained between the tests and predictions.
Penny-shaped crack in a piezoceramic cylinder under Mode I loading Peer-reviewed

F Narita, S Lin, Y Shindo

ARCHIVES OF MECHANICS　55　(3)　275-304　2003

ISSN： 0373-2029
Magnetic Stress Intensity Factors for Center-Cracked Plate Specimens Under Tension Peer-reviewed

K. Horiguchi, Y. Shindo, D. Sekiya, F. Narita

Mesomechanics of Computation and Design of Use-Specific Materials, Simulation and Fabrication of Advanced Materials with Mesoscopic Structures, Edited by G. C. Sih, S. Sakai, V. E. Panin　348-355　2003
Impact Response of a Piezoelectric Ceramic Cylinder with a Penny-Shaped Crack Peer-reviewed

F. Narita, Y. Shindo, S. Lin

Theoretical and Applied Mechanics　52　153-162　2003

DOI： 10.11345/nctam.52.153 　
Electroelastic fracture mechanics of piezoelectric ceramics Invited Peer-reviewed

F Narita, Y Shindo, K Horiguchi

MECHANICS OF ELECTROMAGNETIC MATERIAL SYSTEMS AND STRUCTURES　89-101　2003
Electroelastic bending and polarization switching of piezoelectric laminated actuators Peer-reviewed

F Narita, Y Shindo, K Hayashi, M Yoshida

COMPUTATIONAL FLUID AND SOLID MECHANICS 2003, VOLS 1 AND 2, PROCEEDINGS　1471-1474　2003

DOI： 10.1016/B978-008044046-0.50359-6 　
Electroelastic Fracture Mechanics Analysis of Piezoelectric Ceramic Strip Peer-reviewed

F. Narita, Y. Shindo, S. Lin

Theoretical and Applied Mechanics　51　23-34　2002/09

DOI： 10.11345/nctam.51.23 　
Antiplane shear wave scattering from two curved interface cracks between a piezoelectric fiber and an elastic matrix Peer-reviewed

Y Shindo, K Minamida, F Narita

SMART MATERIALS & STRUCTURES　11　(4)　534-540　2002/08

DOI： 10.1088/0964-1726/11/4/308 　

ISSN： 0964-1726
Thermoelastic analysis of cracked woven GFRP laminates at cryogenic temperatures Peer-reviewed

T Takeda, Y Shindo, F Narita, S Kumagai

CRYOGENICS　42　(8)　451-462　2002/08

DOI： 10.1016/S0011-2275(02)00051-6 　

ISSN： 0011-2275
Evaluation of Electric Fracture and Deformation Properties of Piezoelectric Ceramics Using Finite Element and Modified Small Punch Test Techniques Peer-reviewed

Y. Shindo, F. Narita, K. Horiguchi, Y. Magara, M. Yoshida

Proceedings of International Conference on New Challenges in Mesomechanics　Vol. 2　349-355　2002/08
Evaluation of electric fracture properties of piezoelectric ceramics using the finite element and single-edge precracked-beam methods Peer-reviewed

Y Shindo, H Murakami, K Horiguchi, F Narita

JOURNAL OF THE AMERICAN CERAMIC SOCIETY　85　(5)　1243-1248　2002/05

ISSN： 0002-7820
Finite Element Analysis and Modified Small Punch Testing for Determining the Fracture and Polarization Switching Properties of Piezoelectric Ceramics

MAGARA Yasuyo, YOSHIDA Muneyuki, SHINDO Yasuhide, NARITA Fumio, HORIGUCHI Katsumi

The proceedings of the JSME annual meeting　2002　1-2　2002
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.2002.2.0_1 　

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The fracture behavior of a piezoelectric ceramic under applied electric fields has been discussed through experimental and theoretical characterizations. The modified small punch (MSP) tests were performed on a commercial PZT ceramic. The fracture initiation loads under different electric fields are obtained from the experiment. A nonlinear finite element analysis was also employed to calculate the deflection and MSP energy. An expression is presented for determining the fracture properties due to electrical effects by expreimental and theoretical means.
Scattering of Antiplane Shear Waves by a Circular Piezoelectric Inclusion Embedded in a Piezoelectric Medium Subjected to a Steady-State Electrical Load Peer-reviewed

Y. Shindo, H. Moribayashi, F. Narita

ZAMM　82　(1)　43-49　2002

DOI： 10.1002/1521-4001(200201)82:1<43::AID-ZAMM43>3.0.CO;2-Z 　
A Circular Piezoelectric Inclusion Embedded in an Elastic Matrix with Two Curved Interface Cracks under Dynamic Antiplane Shear Peer-reviewed

Y. Shindo, K. Minamida, F. Narita

Applied Mechanics in the Americas　9　89-92　2002
Electroelastic Analysis of a Long Circular Piezoelectric Cylinder with a Penny-Shaped Crack Peer-reviewed

F. Narita, S. Lin, Y. Shindo

Applied Mechanics in the Americas　9　329-332　2002
Transient thermal-mechanical response of glass-fiber reinforced plastics at low temperatures Peer-reviewed

Y Shindo, F Narita

ACTA MECHANICA　157　(1-4)　159-174　2002

DOI： 10.1007/BF01182161 　

ISSN： 0001-5970
Single-Edge Precracked Beam Test and Electric Fracture Mechanics Analysis for Piezoelectric Ceramics Peer-reviewed

Y. Shindo, K. Horiguchi, H. Murakami, F. Narita

Proceedings of SEPI　4235　311-320　2001/12

DOI： 10.1117/12.420894 　
Circular Inclusion Problem in Dynamic Antiplane Piezoelectricity Peer-reviewed

F. Narita, Y. Shindo, H. Moribayashi

Proceedings of SPIE　4235　69-78　2001/12

DOI： 10.1117/12.420884 　
Mode I crack growth rate for yield strip model of a narrow piezoelectric ceramic body Peer-reviewed

F Narita, Y Shindo

THEORETICAL AND APPLIED FRACTURE MECHANICS　36　(1)　73-85　2001/07

DOI： 10.1016/S0167-8442(01)00058-1 　

ISSN： 0167-8442
K-0836 Antiplane Shear Wave Scattering From Two Curved Interface Cracks Between a Piezoelectric Fiber and an Elastic Matrix

MINAMIDA Keiichi, SHINDO Yasuhide, NARITA Fumio

The proceedings of the JSME annual meeting　1　451-452　2001
Publisher: The Japan Society of Mechanical Engineers
DOI： 10.1299/jsmemecjo.I.01.1.0_451 　

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Following the dynamic theory of linear piezoelectricity, we consider the scattering of horizontally polarized shear waves from a single piezoelectric fiber partially bonded to an elastic matrix. The debonding is assumed to be two curved interface cracks with non-contacting faces, and the two cracks are symmetrically located with respect to the axis of wave propagation. Wave function expansion method is used to reduce the problem to the solution of a pair of dual series equations, the solution of which is then expressed in terms of a singular integral equation introducing a dislocation density function. Numerical calculations for P7-epoxy and N8-epoxy composites are carried out, and the effects of frequency, crack angle and piezoelectric material constants on the scattering cross section, dynamic stress intensity factor and dynamic energy release rate are shown graphically.
Scattering of Antiplane Shear Waves from a Partially Debonded Piezoelectric Fiber Peer-reviewed

Y. Shindo, F. Narita, H. Moribayashi, K. Minamida

Theoretical and Applied Mechanics　50　183-191　2001

DOI： 10.11345/nctam.50.183 　
Thermal-Mechanical Response of Cracked Woven Glass/Epoxy Laminates in a Tension Field at Low Temperature Peer-reviewed

T. Takeda, Y. Shindo, S. Kumagai, F. Narita, K. Horiguchi

Physical Mesomechanics　4　(4)　97-104　2001
Evaluation of Single-Edge Precracked Beam Specimens of Piezoelectric Ceramics Peer-reviewed

Y. Shindo, M. Oka, K. Horiguchi, F. Narita

Role of Mechanics for Development of Science and Technology　Vol. II　863-872　2000/06
Electroelastic Analysis of a Piezoelectric Ceramic Strip with a Central Crack Peer-reviewed

Y. Shindo, K. Watanabe, F. Narita

Int. J. Engng Sci.　38　(1)　1-19　2000

DOI： 10.1016/S0020-7225(99)00015-4 　
Scattering of antiplane shear waves by a finite crack in piezoelectric laminates Peer-reviewed

F Narita, Y Shindo

ACTA MECHANICA　134　(1-2)　27-43　1999

DOI： 10.1007/BF01170302 　

ISSN： 0001-5970
Fatigue crack propagation in a piezoelectric ceramic strip subjected to mode III loading Peer-reviewed

F Narita, Y Shindo

ACTA MECHANICA　137　(1-2)　55-63　1999

ISSN： 0001-5970
Impact response of a finite crack in an orthotropic piezoelectric ceramic Peer-reviewed

Y Shindo, F Narita, E Ozawa

ACTA MECHANICA　137　(1-2)　99-107　1999

ISSN： 0001-5970
The Interface Crack Problem for Bonded Piezoelectric and Orthotropic Layers under Antiplane Shear Loading Peer-reviewed

F. Narita, Y. Shindo

Int. J. Fract.　98　(1)　87-101　1999

DOI： 10.1023/A:1018755614151 　
Fatigue Crack Propagation of a Finite Crack in a Piezoelectric Ceramic Strip under Tension Load Peer-reviewed

Y. Shindo, F. Narita

Applied Mechanics in the Americas　(7)　643-646　1999/01
Anti-plane shear crack in a piezoelectric layer bonded to dissimilar half spaces Peer-reviewed

F Narita, Y Shindo, K Watanabe

JSME INTERNATIONAL JOURNAL SERIES A-SOLID MECHANICS AND MATERIAL ENGINEERING　42　(1)　66-72　1999/01

DOI： 10.1299/jsmea.42.66 　

ISSN： 1340-8046
Layered piezoelectric medium with interface crack under anti-plane shear Peer-reviewed

F Narita, Y Shindo

THEORETICAL AND APPLIED FRACTURE MECHANICS　30　(2)　119-126　1998/10

DOI： 10.1016/S0167-8442(98)00048-2 　

ISSN： 0167-8442
Anti-plane shear crack growth rate of piezoelectric ceramic body with finite width Peer-reviewed

F Narita, Y Shindo

THEORETICAL AND APPLIED FRACTURE MECHANICS　30　(2)　127-132　1998/10

DOI： 10.1016/S0167-8442(98)00049-4 　

ISSN： 0167-8442
Dynamic anti-plane shear of a cracked piezoelectric ceramic Peer-reviewed

F Narita, Y Shindo

THEORETICAL AND APPLIED FRACTURE MECHANICS　29　(3)　169-180　1998/07

DOI： 10.1016/S0167-8442(98)00028-7 　

ISSN： 0167-8442
Dynamic bending of a symmetric piezoelectric laminated plate with a through crack Peer-reviewed

Y Shindo, W Domon, F Narita

THEORETICAL AND APPLIED FRACTURE MECHANICS　28　(3)　175-182　1998/02

DOI： 10.1016/S0167-8442(98)00003-2 　

ISSN： 0167-8442
Scattering of Love waves by a surface-breaking crack in piezoelectric layered media Peer-reviewed

F Narita, Y Shindo

JSME INTERNATIONAL JOURNAL SERIES A-SOLID MECHANICS AND MATERIAL ENGINEERING　41　(1)　40-48　1998/01

DOI： 10.1299/jsmea.41.40 　

ISSN： 1340-8046
Electroelastic Analysis of Piezoelectric Ceramics with Surface Electrodes Peer-reviewed

Y. Shindo, F. Narita, H. Sosa

Int. J. Engng Sci.　36　(9)　1001-1009　1998

DOI： 10.1016/S0020-7225(98)00007-X 　
Electroelastic Analysis of Fatigue Crack Growth in a Piezoelectric Ceramic Under Longitudinal Shear Peer-reviewed

F. Narita, Y. Shindo

Proceedings of the Japan-France Seminar on Intelligent Materials and Structures　149-158　1997/10
The Scattering of Flexural Waves of a Symmetric Piezoelectric Laminated Plate with a Through Crack Peer-reviewed

Y.Shindo, W.Domon, F.Narita

Proceedings of the International Society for Optical Engineering　608-618　1997/03
Singular stress and electric fields of a piezoelectric ceramic strip with a finite crack under longitudinal shear Peer-reviewed

Y Shindo, K Tanaka, F Narita

ACTA MECHANICA　120　(1-4)　31-45　1997

ISSN： 0001-5970
Bending of a Symmetric Piezothermoelastic Laminated Plate with a Through Crack Peer-reviewed

Y. Shindo, W. Domon, F. Narita

Archives of Mechanics　49　(2)　403-412　1997
Diffraction of Antiplane Shear Waves by a Finite Crack in an Orthotropic Piezoelectric Ceramic Strip Peer-reviewed

F. Narita, Y. Shindo

Theoretical and Applied Mechanics　46　139-149　1997
Electroelastic intensification near anti-plane shear crack in orthotropic piezoelectric ceramic strip Peer-reviewed

Y Shindo, F Narita, K Tanaka

THEORETICAL AND APPLIED FRACTURE MECHANICS　25　(1)　65-71　1996/04

DOI： 10.1016/0167-8442(96)00008-0 　

ISSN： 0167-8442
Diffraction of an Antiplane Shear Wave by a Finite Crack in an Orthotropic Piezoelectric Ceramic Peer-reviewed

Y. Shindo, F. Narita

ASCE Engineering Mechanics, Proceedings of 10th Conference　1　577-580　1995/05

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Misc. 87

屋久島地杉の樹皮廃棄物を利用したグリーンコンポジットの作製と力学特性および生分解性 Invited

ローヴァロヴィサ, 小久保寿尊, 王真金, 栗田大樹, 家山英宜, 成田史生

プラスチックス　76　(7)　1-4　2025/07
感染対策に通じる革新的空間創生とキーテクノロジー（６）ウイルスセンサ研究開発 Invited

成田史生

日本臨牀　83　(4)　578-579　2025/04
手すき和紙を原料とした高強度で高生分解性の複合材料の開発 Invited

Rova Lovisa,Gallet--Pandellé Alia, 王真金, 栗田大樹, 成田史生

機能材料　45　(3)　3-9　2025/03
磁歪材料の力学 Invited

成田史生

機械の研究　76　(11)　855-864　2024/11
炭素繊維強化圧電複合材料の開発と振動発電・蓄電によるワイヤレス情報通信

栗田大樹, 王真金, 余瑶楠, 成田史生

クリーンエネルギー / クリーンエネルギー編集委員会編　32　(11)　41-44　2023/11
Publisher: 日本工業出版
ISSN： 0918-7510
Fabrication and Property Evaluation of Cellulose Nanofiber Reinforced Silkworm Silk Fibers

栗田大樹, Wang Zhenjin, 堀雅敏, 清水紀弘, 成田史生

繊維学会誌　79　(7)　2023

ISSN： 0037-9875
圧電・磁歪複合材料によるウイルスの電池レスセンシング Invited Peer-reviewed

成田史生, 王真金, 栗田大樹

バムサジャーナル　35　(1)　5-9　2023/01
圧電性を有する炭素繊維強化プラスチック複合材料 Invited Peer-reviewed

王真金, 成田史生

日本複合材料学会誌　49　(1)　13-19　2023/01
湿式せん断混合と放電プラズマ焼結により作製したB₄C粒子強化アルミニウム基複合材料の引張特性

小山毅士, 栗田大樹, 成田史生, シャフロンローラン, デズルスオリビエ, アンドリュージェローム

粉体粉末冶金協会講演大会(Web)　2022　2022
Powdering Resistance of galvannealed coating: Verification by Sputtering Method

薗部駿太, 安藤大輔, 須藤祐司, 栗田大樹, 成田史生

材料とプロセス(CD-ROM)　35　(2)　2022

ISSN： 1882-8922
Development of Electricity-generating smart composite material

久保田勇希, 高石佳, 栗田大樹, 成田史生, 中里亜紀子, 山本研吾

日本複合材料合同会議(Web)　12th　2021
植物ナノファイバーと蚕糸からなるグリーン複合糸の創製

栗田大樹, 菅野晃歓, 王真金, 成田史生

コンバーテック　49　(6)　2021

ISSN： 0911-2316
Fe-Co 系磁歪合金を用いた複合材料の振動・衝撃発電特性 Invited Peer-reviewed

成田史生

まてりあ　59　(1)　16-20　2020/01
Effect of Additional Elements on the Magnetostrictive, Magnetic and Mechanical Properties of Co-Rich Fe-Co Alloys

中島賢也, 栗田大樹, 古屋泰文, 成田史生

日本機械学会年次大会講演論文集(CD-ROM)　2019　2019

ISSN： 2424-2667
振動発電機能を持つクラッド鋼板の開発 Invited Peer-reviewed

成田史生

パリティー　34　(1)　25-27　2019/01
振動発電機能を持つクラッド鋼板 Invited Peer-reviewed

成田史生

パリティー　33　(11)　46-49　2018/11
FeCo合金を用いた複合材料の開発とセンサ・振動発電デバイスへの応用

成田史生, 栗田大樹, YANG Zhenjun, 中島賢也, WANG Zhenjin

日本機械学会機械材料・材料加工技術講演会論文集(CD-ROM)　26th　2018

ISSN： 2424-287X
強靱かつ軽量性を具えた自立発電型スマート磁歪材料の開発 Invited

成田史生

クリーンエネルギー　26　(5)　35-39　2017/05
Publisher: 日本工業出版
ISSN： 0918-7510
極低温・高温環境における圧電材料の数値シミュレーション Invited

成田史生

精密工学会誌　83　(5)　411-414　2017/05
Publisher: 精密工学会
DOI： 10.2493/jjspe.83.411 　

ISSN： 0912-0289
傾斜機能圧電材料の構造制御と機能設計 Invited

成田史生

金属　86　(9)　27-33　2016/09
Publisher: アグネ技術センター
酸素空孔を有する強誘電性多結晶材料のフェーズフィールドシミュレーション Invited Peer-reviewed

成田史生

スマートプロセス学会誌　5　(1)　3-8　2016/01
Publisher: 高温学会
DOI： 10.7791/jspmee.5.3 　

ISSN： 2186-702X
222 Miyagi cotton production and its applications to composite materials and structures : Towards a creation of Tohoku new agriculture and industry

Narita Fumio

2015　37-38　2015/11/27
Publisher: The Japan Society of Mechanical Engineers
OS1509-289 Piezoelectric Vibration Energy Harvest and Response Characteristics of Barium Titanate Laminates

ZHU Xiaolong, NARITA Fumio, SHINDO Yasuhide

2015　"OS1509-289-1"-"OS1509-289-2"　2015/11/21
Publisher: The Japan Society of Mechanical Engineers

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This paper studies the vibration energy harvest and response characteristics of poled barium titanate (BT) unimorph cantilevers both analytically and experimentally. The unimorph cantilever consists of the BT layer and Cu shim, and the BT layer has sensing, grounding and driving electrodes. The output voltage of the cantilever excited by bending vibration was predicted by three dimensional finite element analysis (FEA). The output voltage was also measured, and a comparison was made between prediction and experiment. The effects of sensing electrode geometry and load resistance on the dynamic electromechanical fields and output power were then discussed in detail.
GS0402-157 Mode I Fracture and Electrical Resistance Behaviors of Bonded CFRP Joints with CNT-based Polymer Adhesive Layer

TAKEDA Tomo, NARITA Fumio, SHIKANAI Koji

2015　"GS0402-157-1"-"GS0402-157-2"　2015/11/21
Publisher: The Japan Society of Mechanical Engineers

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This paper studies the Mode I fracture behavior and crack monitoring of bonded carbon fiber reinforced polymer (CFRP) composite joints with carbon nanotube (CNT)-based polymer adhesive layer. Mode I fracture tests were carried out with double cantilever beam (DCB) bonded joint specimens consisting of woven carbon/epoxy composite adherends and CNT-based epoxy adhesives, and the critical energy release rate at the onset of crack growth, i.e., fracture toughness, was evaluated. The electrical resistance of the bonded joint specimens was also monitored during the tests. An analytical model based on the electrical conduction mechanism of CNT-based polymers was employed to describe the electrical resistance change due to crack propagation in the bonded joint specimens, and a good correlation was obtained between the predicted and measured results.
158 Effects of Grain Size and Oxygen Vacancy Density on the Elastic and Piezoelectric Properties of BaTiO3 Polycrystals: Phase Field Simulations

Kobayashi Takuya, Narita Fumio

The Computational Mechanics Conference　2015　(28)　"158-1"-"158-2"　2015/10/10
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-026X

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This work investigates the electromechanical response of poled barium titanate (BaTiO_3) polycrystals with oxygen vacancies at room temperature. A phase field model is developed for ferroelectric polycrystals, coupled with the time-dependent Ginzburg-Landau theory and the oxygen vacancies diffusion, to demonstrate the interaction between oxygen vacancies and domain evolutions. To generate grain structures, the phase field model for grain growth is also employed. The strain vs stress curve and strain vs electric field curve are computed, and the effects of grain size and oxygen vacancy density on the elastic and piezoelectric properties of the BaTiO_3 polycrystals are discussed.
J0610103 High Temperature Electromechanical Response of Multilayer Piezoelectric Actuators under AC Electric Fields for Fuel Injector Applications

NARITA Fumio, SHINDO Yasuhide

Mechanical Engineering Congress, Japan　2015　"J0610103-1"-"J0610103-2"　2015/09/13
Publisher: The Japan Society of Mechanical Engineers

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This paper examines theoretically and experimentally the dynamic electromechanical response of multilayer piezoelectric actuators for fuel injectors at high temperatures. A phenomenological model of depolarization at high temperatures was used, and the temperature dependent piezoelectric coefficients were obtained. The high temperature electromechanical fields of the multilayer piezoelectric actuators under AC electric fields were then calculated by the finite element method. In addition, test data on the electric field induced strain at high temperatures, which verify the model, were presented.
Cryomechanics and crack behaviour of woven polymer matrix composites

Yasuhide Shindo, Tomo Takeda, Fumio Narita

Computational and Experimental Methods in Structures　6　159-178　2015
Publisher: World Scientific Publishing Co. Pte Ltd
DOI： 10.1142/9781783266180_0005 　

ISSN： 2044-9283
G0310903 Fracture Behavior of Cracked Giant Magnetostrictive Materials in Three-Point Bending under Magnetic Fields

SHIKANAI Koji, SHINDO Yasuhide, NARITA Fumio, MORI Kotaro

Mechanical Engineering Congress, Japan　2014　"G0310903-1"-"G0310903-3"　2014/09/07
Publisher: The Japan Society of Mechanical Engineers

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We present theoretical and experimental results on the fracture behavior of single-edge precracked giant magnetostrictive materials under magnetic fields. The crack was created normal to the direction of easy magnetization. Three-point bending fracture tests were carried out, and the fracture loads were measured. Plane strain finite element analysis was also performed, and the energy release rate was calculated. The effect of magnetic field on the energy release rate and apparent fracture toughness (critical energy release rate obtained using the fracture load) was then discussed.
616 Effects of Electric Field and Poling on the Mode I Energy Release Rate in Cracked Piezoelectric Ceramics at Cryogenic Temperatures

KATO Taiki, SHINDO Yasuhide, NARITA Fumio

2014　(51)　"616-1"-"616-2"　2014/03/01
Publisher: The Japan Society of Mechanical Engineers
121 Fatigue Delamination Growth in Woven Glass/Epoxy Composite Laminates under Mixed-mode II/III Loading Conditions at Cryogenic Temperatures

TAKEDA Tomo, SHINDO Yasuhide, NARITA Fumio

2014　(49)　43-44　2014
Publisher: The Japan Society of Mechanical Engineers
Interlaminar delamination fracture and fatigue of woven glass fiber reinforced polymer composite laminates at cryogenic temperatures

Yasuhide Shindo, Tomo Takeda, Fumio Narita

Polymers at Cryogenic Temperatures　9783642353352　115-125　2013/11/01
Publisher: Springer-Verlag Berlin Heidelberg
DOI： 10.1007/978-3-642-35335-2_5 　
206 Fracture and Electrical Resistance Behaviors of Cracked Carbon Nanotube/Polymer Composites under High-rate Tensile Loading

TAKEDA Tomo, SHINDO Yasuhide, NARITA Fumio

2013　(49)　41-42　2013/09/20
Publisher: The Japan Society of Mechanical Engineers
119 Detection and Response Characteristics of Giant Magnetostrictive/Piezoelectric Laminated Cantilevers under Concentrated Loads

MORI Kotaro, SHINDO Yasuhide, NARITA Fumio

2013　(48)　40-41　2013/03/15
Publisher: The Japan Society of Mechanical Engineers
118 Dynamic Bending of Clamped-Free Giant Magnetostrictive/Piezoelectric Laminates under AC Electric Fields

MORI Kotaro, SHINDO Yasuhide, NARITA Fumio

2012　(48)　40-41　2012/09/22
Publisher: The Japan Society of Mechanical Engineers
139 Three-dimensional Stress Analysis of Cracked Satin Woven Carbon Fiber Reinforced/Polymer Composites under Tension at Cryogenic Temperatures

TAKEDA Tomo, SHINDO Yasuhide, NARITA Fumio

2012　(47)　84-85　2012/03/13
Publisher: The Japan Society of Mechanical Engineers
G030081 Electrical Conductivity of Carbon Nanotube-based Polymer Composites

KURONUMA Yu, TAKEDA Tomo, SHINDO Yasuhide, NARITA Fumio

Mechanical Engineering Congress, Japan　2011　"G030081-1"-"G030081-3"　2011/09/11
Publisher: The Japan Society of Mechanical Engineers

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In this research, we investigate both analytically and experimentally the electrical properties of carbon nanotube (CNT)-based polymer composites. An analytical model was developed to predict the electrical conductivity of CNT-based composites. The micro/nanoscale structures of the nanocomposites and the electrical tunneling effect due to the matrix material between CNTs were incorporated within the model. Electrical conductivity measurements were also performed on CNT/polycarbonate composites to identify the dependence of their electrical transport characteristics on the nanotube content. The analytical predictions were compared with the experimental data, and a good correlation was obtained between the predicted and measured results.
123 Cryogenic Delamination Growth in Woven Glass/Epoxy Composite Laminates under Mixed-mode I/II Fatigue Loading

MIURA Masaya, SHINDO Yasuhide, TAKEDA Tomo, NARITA Fumio

2011　(46)　50-51　2011/03/15
Publisher: The Japan Society of Mechanical Engineers
212 Effect of Damage on the Interlaminar Shear Properties of Hybrid Composite Laminates at Cryogenic Temperatures

MIURA Masaya, SHINDO Yasuhide, TAKEDA Tomo, NARITA Fumio

2010　293-294　2010/10/09
Publisher: The Japan Society of Mechanical Engineers

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This paper presents the expenniental and numerical characterization of the interlaminar shear failure of hybrid composite laminates at cryogenic temperatures. Cryogenic short beam shear tests were performed on hybrid laminates consisting of woven glass fiber reinforced polymer (GFRP) composites and polyimide films to evaluate their interlaminar shear strength. Microscopic observations of damage accumulation and failure mechanisms were also made on failed specimens. In addition, a progressive damage analysis was conducted to predict the initiation and growth of damage in the specimens, and the interlaminar shear strength was determined from the maximum shear stress in the failure region The damage effect on the interlaminar shear properties of hybrid laminates at cryogenic temperatures was examined based on the experimental and numerical results.
214 Dynamic Characteristics and Electromechanical Fields of 1-3 Piezoelectric/Polymer Composites under AC Electric Fields

NARITA Fumio, SHINDO Yasuhide

2010　297-298　2010/10/09
Publisher: The Japan Society of Mechanical Engineers

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This paper studies the dynamic electromechanical response of 1-3 piezoelectric/polymer composites under alternating current (AC) electric fields. The piezocomposites contain square or circular piezoelectric rods in an epoxy matrix. Experiments were conducted to measure the electrical impedance and phase angle at various frequency, using the device specimen of the 1-3 piezocomposites. Three dimensional finite element analysis was also employed to calculate the frequency characteristics, and a comparison was made between simulation and experiment. The dynamic electromechanical fields in the 1-3 piezocomposites were then discussed in detail.
702 Numerical and Experimental Evaluation of Cryogenic Tensile Strength of Woven Fabric-reinforced Glass/Epoxy Composites Using the Open Hole Specimens

SHINDO Yasuhide, WATANABE Shinya, TAKEDA Tomo, NARITA Fumio, MATSUDA Takuya, YAMAKI Satoru

2010　(46)　195-196　2010/09/24
Publisher: The Japan Society of Mechanical Engineers
131 Singular Stress Fields for Transverse Cracks in Multi-Layer Satin Woven CFRP Composite Laminates under Cryogenic Conditions

WATANABE Shinya, SHINDO Yasuhide, TAKEDA Tomo, NARITA Fumio

2010　(45)　64-65　2010/03/12
Publisher: The Japan Society of Mechanical Engineers
Evaluation of cryogenic interlaminar shear strength of insulation systems by short beam shear test

MIURA Masaya, SHINDO Yasuhide, TAKEDA Tomo, NARITA Fumio, WATANABE Shinya, KOIZUMI Norikiyo, IDESAKI Akira, OKUNO Kiyoshi

81　226-226　2009/11/18

ISSN： 0919-5998
407 Fatigue Crack Growth Behavior of Metastable Austenitic Stainless Steel in Cryogenic High Magnetic Field Environments

SHINDO Yasuhide, TAKEDA Tomo, NARITA Fumio

2009　(45)　103-104　2009/09/26
Publisher: The Japan Society of Mechanical Engineers
OS0408 Electric Delayed Fracture and Localized Polarization Switching of Cracked Piezoelectric Ceramics in Three-Point Bending

NARITA Fumio, SHINDO Yasuhide

2009　555-556　2009/07/24
Publisher: The Japan Society of Mechanical Engineers

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This paper discusses the delayed fracture and localized polarization switching near a crack tip in three-point bending piezoceramics under electromechanical loading. Delayed fracture experiments were performed on the piezoelectric ceramics with single-edge precracked-beam method. A nonlinear finite element analysis was also employed to calculate the fracture mechanics parameters such as energy release rate for the permeable, impermeable, open and discharging crack face boundary conditions. The effects of applied electric field and localized polarization switching on the fracture mechanics parameters and lifetime vs energy release rate curves were then examined
Characteristics of detection and response in multilayer piezoelectric film actuators and multi-scale performance evaluation

Reports of Toyoda Physical and Chemical Research Institute.　(62)　139-142　2009/05
Publisher: 豊田理化学研究所
ISSN： 0372-039X
121 Effect of Interfacial Damage on the Cryogenic Bending Behavior of CNT-based Composites

KURONUMA Yu, SHINDO Yasuhide, MITO Yuya, TAKEDA Tomo, NARITA Fumio

2009　(44)　40-41　2009/03/13
Publisher: The Japan Society of Mechanical Engineers
120 Mode III delamination fatigue crack growth behavior of GFRP woven laminates at cryogenic temperatures

MIURA Masaya, SHINDO Yasuhide, NARITA Fumio, WATANABE Shinya, SUZUKI Masato

2009　(44)　38-39　2009/03/13
Publisher: The Japan Society of Mechanical Engineers
Mode 2 fatigue delamination growth behavior of woven GFRP laminates at cryogenic temperatures (JCOM-38 プログラム--材料・構造の複合化と機能化に関するシンポジウム)

進藤裕英, 竹田智, 成田史生

JCOM講演論文集　38　91-94　2009/03/10
Publisher: [日本材料学会]
Analysis of mixed-mode interlaminar fracture and damage behavior of GFRP woven laminates at cryogenic temperatures

Yasuhide Shindo, Fumio Narita, Susumu Takahashi, Takashi Sato, Tomo Takeda

CRYOGENICS　49　(2)　80-83　2009/02

DOI： 10.1016/j.cryogenics.2008.10.019 　

ISSN： 0011-2275
Mode III fatigue delamination growth of glass fiber reinforced polymer woven laminates at cryogenic temperatures

SHINDO Yasuhide, NARITA Fumio, WATANABE Shinya, SUZUKI Masato

79　227-227　2008/11/12

ISSN： 0919-5998
146 Multiscale Evaluation of Tensile Behavior of Carbon Nanotube Reinforced Composites at Cryogenic Temperatures

TAKEDA Tomo, SHINDO Yasuhide, NARITA Fumio, MITO Yuya

The Computational Mechanics Conference　2008　(21)　678-679　2008/11/01
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-026X
404 Scattering of Elastic Waves by a Diamond Shaped Inclusion with Cracks

SHINDO Yasuhide, NARITA Fumio

2008　(44)　111-112　2008/09/27
Publisher: The Japan Society of Mechanical Engineers
OS0213 Evaluation of Cryogenic Elastic-Plastic Fracture Properties of Austenitic Stainless Steels in High Magnetic Field Environments

Suzuki Masato, Shindo Yasuhide, Narita Fumio

2008　"OS0213-1"-"OS0213-2"　2008/09/16
Publisher: The Japan Society of Mechanical Engineers

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This paper studies the effect of magnetic field on the fracture behavior of the metastable austenitic stainless steels at cryogenic temperatures. Elastic-plastic fracture toughness tests were performed on compact tension (CT) specimens in liquid helium at 4 K with and without a magnetic field, and the effect of magnetic field on the cryogenic fracture toughness was discussed. Quantitative phase analysis was also done by magnetic method, and the fracture surfaces were examined by scanning electron microscopy (SEM) to correlate with the fracture properties.
Cryogenic fracture behavior of metastable austenitic stainless steel in a strong magnetic field

SHINDO Yasuhide, NARITA Fumio, SUZUKI Masato

78　42-42　2008/05/26

ISSN： 0919-5998
Characteristics of detection and response in functionally graded piezoelectric materials and multi-scale performance evaluation

Reports of Toyoda Physical and Chemical Research Institute.　(61)　149-153　2008/05
Publisher: 豊田理化学研究所
ISSN： 0372-039X
142 Scattering of Elastic Waves by a Star Shaped Inclusion

NAKAMURA Tasuku, SHINDO Yasuhide, NARITA Fumio

2008　(43)　85-86　2008/03/15
Publisher: The Japan Society of Mechanical Engineers
141 Nonlinear Dynamic Bending and Self-Sensing of Functionally Graded Piezoelectric Transducers

NAKAGAWA Jun, SHINDO Yasuhide, NARITA Fumio

2008　(43)　83-84　2008/03/15
Publisher: The Japan Society of Mechanical Engineers
401 Cyclic Fatigue Crack Growth in Three-Point Bending PZT Ceramics under Electromechanical Loading

NARITA Fumio, SHINDO Yasuhide

2007　272-273　2007/10/24
Publisher: The Japan Society of Mechanical Engineers

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This paper investigates experimentally and analytically the cyclic fatigue crack growth in piezoelectric ceramics under electromechanical loading. Cyclic crack growth tests were conducted on PZT ceramics subjected to dc electric fields, and a finite element analysis was employed to calculate the maximum energy release rate for the permeable crack model. Based on bending experiments using single-edge precracked-beam specimens, cyclic fatigue crack growth rates are found to be sensitive to the maximum energy release rate and applied dc electric fields. Possible mechanisms for crack growth were discussed by scanning electron microscope (SEM) examination of the fracture surface of the PZT ceramics.
204 The Influence of Magnetic Field on the Fracture Behavior of Soft Ferromagnetic Materials

SHINDO Yasuhide, NARITA Fumio

2007　(43)　37-38　2007/09/29
Publisher: The Japan Society of Mechanical Engineers
Mode II interlaminar fracture and damage of plain weave glass/epoxy laminates in four-point bending at cryogenic temperatures

SHINDO Yasuhide, SATO Takashi, NARITA Fumio, WATANABE Shinya, SANADA Kazuaki

76　193-193　2007/05/16

ISSN： 0919-5998
Mode 2 interlaminar fracture toughness evaluation of GFRP woven laminates at cryogenic temperatures using the 4ENF specimen

36　87-91　2007/03/08
Publisher: [日本材料学会]
Interlaminar fracture and damage of plain weave glass/epoxy laminates in mode II at cryogenic temperatures

SATO Takashi, SHINDO Yasuhide, NARITA Fumio

75　279-279　2006/11/15

ISSN： 0919-5998
109 Tensile/Fatigue Behavior of Plain Weave Glass/Epoxy Composite Laminates at Cryogenic Temperatures

SHINDO Yasuhide, NARITA Fumio, SATO Takashi

2006　(42)　17-18　2006/09/30
Publisher: The Japan Society of Mechanical Engineers
Mode III Interlaminar Fracture Toughness of Glass-Cloth/Epoxy Laminates at Cryogenic Temperatures

SHINDO Yasuhide, HORIGUCHI Katsumi, NARITA Fumio, RIZOV Victor

74　248-248　2006/05/15

ISSN： 0919-5998
508 Electroelastic Response of a Flat Annular Crack in a Piezoelectric Fiber Surrounded by an Elastic Medium

LIN Sen, SHINDO Yasuhide, NARITA Fumio

2006　(41)　207-208　2006/03/14
Publisher: The Japan Society of Mechanical Engineers
514 Mode I Delamination Fatigue Crack Growth Behavior of Plain Weave Glass/Epoxy Laminates at Cryogenic Temperatures

SHINDO Yasuhide, NARITA Fumio, HORIGUCHI Katsumi

2005　(41)　203-204　2005/09/09
Publisher: The Japan Society of Mechanical Engineers
Mode I fatigue delamination growth in GFRP woven laminates at low temperatures

SHINDO Yasuhide, INAMOTO Akihiro, NARITA Fumio, HORIGUCHI Katsumi

72　191-191　2005/05/31

ISSN： 0919-5998
201 Electroelastic Fracture Mechanics Analysis of Central Active Piezoelectric Transformer

LIN Sen, SHINDO Yasuhide, NARITA Fumio, MIKAMI Masaru

2005　(40)　52-53　2005/03/15
Publisher: The Japan Society of Mechanical Engineers
107 Eletroelastic Field Concentrations and Polarization Switching by Electrodes in Piezoelectric Material Systems

NARITA Fumio, SHINDO Yasuhide

2005　17-20　2005
Publisher: 日本機械学会
202 Fracture Toughness and Damage Progression of Woven Glass-Epoxy Laminates at Cryogenic Temperatures

SANADA Kazuaki, SHINDO Yasuhide, NARITA Fumio

2005　63-66　2005
Publisher: 日本機械学会
OS0417 Delamination Growth Mechanisms in Woven Glass Fiber Reinforced Polymer Composites under Mode II Fatigue Loading at Cryogenic Temperatures

SAITO Nozomi, SHINDO Yasuhide, TAKEDA Tomo, NARITA Fumio

40　(4)　712-713　2004/12/01
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-964X

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The purpose of this research is to characterize the cryogenic delamination growth behavior in woven glass fiber reinforced polymer (GFRP) composite laminates subjected to Mode II fatigue loading. Mode II fatigue delamination tests were performed at room temperature, liquid nitrogen temperature (77 K) and liquid helium temperature (4 K) using the four-point bend end-notched flexure (4ENF) test method, and the delamination growth rate data for the woven GFRP laminates were obtained. The energy release rate range was determined by the finite element method. Microscopic examinations of the specimen sections and fracture surfaces were also carried out The present results are discussed to obtain an understanding of the fatigue delamination growth mechanisms in the woven GFRP laminates under Mode II loading at cryogenic temperatures.
Cryogenic Progressive Failure Behavior of Piain Weave Fabric-Reinforced Composites under Tensile Loading

TAKANO Satoru, SHINDO Yasuhide, TAKEDA Tomo, NARITA Fumio

The Computational Mechanics Conference　2004　(17)　237-238　2004/11/17
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-026X
Analysis of mode I Interlaminar Fracture and Damage Behavior of GFRP Woven Laminates at Cryogenic Temperatures

SHINDO Ysuhide, SUMIKAWA Mayumi, TAKEDA Tomo, TAKANO Satoru, NARITA Fumio

The Computational Mechanics Conference　2004　(17)　235-236　2004/11/17
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1348-026X
Low-Temperature Cyclic Fatigue-Crack Growth Behavior in GFRP Woven Laminates

SHINDO Yasuhide, INAMOTO Akihiro, NARITA Fumio, TAKEDA Tomo, KUMAGAI Susumu

71　246-246　2004/11/01

ISSN： 0919-5998
Tensile Testing and Analysis of Ferromagnetic Elastic Strip with Symmetric Edge Cracks in a Uniform Magnetic Field

SHINDO Yasuhide, NARITA Fumio, HORIGUCHI Katsumi

2004　(40)　41-42　2004/09/17
Publisher: The Japan Society of Mechanical Engineers
223 Magnetoelastic Analysis of Magnetostrictive Strip with a Crack under Antiplane Shear

NARITA Fumio, SHINDO Yasuhide, Toyoda Satoshi

2004　(39)　90-91　2004/03/13
Publisher: The Japan Society of Mechanical Engineers
222 Fracture Toughness Test and Damage Analysis of GFRP Woven Laminates at Cryogenic Temperatures

Sumikawa Mayumi, Shindo Yasuhide, Kumagai Susumu, Narita Fumio, Horiguchi Katsumi

2004　(39)　88-89　2004/03/13
Publisher: The Japan Society of Mechanical Engineers
Electric Fracture and Polarization Switching Properties of Piezoelectric Ceramic PZT Studied by the Modified Small Punch Test

SHINDO Yasuhide, NARITA Fumio, HORIGUCHI Katsumi

2003　(39)　59-60　2003/09/05
Publisher: The Japan Society of Mechanical Engineers
Comparison of energy release rate and energy density criteria for a piezoelectric layered composite with a crack normal to interface

LIN Sen, NARITA Fumio, SHINDO Yasuhide

2003　(38)　210-211　2003/03/15
Publisher: The Japan Society of Mechanical Engineers
The Influence of Residual Thermal Stresses on The Stress Intensity Factor for Two-layered Woven Glass/Epoxy Laminates with Cracks at Cryogenic Temperatures

TAKEDA Tomo, SHINDO Yasuhide, NARITA Fumio, SANADA Kazuaki

2003　(38)　208-209　2003/03/15
Publisher: The Japan Society of Mechanical Engineers
Thermoelastic Analysis of Cracked Woven GFRP Laminates at Cryogenic Temperatures

TAKEDA Tomo, SHINDO Yasuhide, NARITA Fumio, KUMAGAI Susumu

2002　(37)　204-205　2002/03/16
Publisher: The Japan Society of Mechanical Engineers

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We deal with the thermal-mechanical response of multi-layered G-11 woven glass/epoxy laminates with cracks and temperature-dependent properties under tension at liquid helium temperature (4K). The composite material is assumed to be in generalized plane strain. Cracks are located in the fill fiber bundles and are assumed to span the width of the fill fiber bundles. Finite element model is used to study the influence of residual thermal stresses on the mechanical behavior of multi-layered woven laminates with cracks. Numerical calculations are carried out, and the Young's modulus and stress distributions near the crack tip are shown graphically.
Electroelastic Fracture Mechanics for Reliability and Durability Assessments of Piezoelectric Devices

NARITA Fumio, HORIGUCHI Katsumi, SHINDO Yasuhide

13　16-19　2001/06/20
503 Evaluation of Electric Fracture Properties of Piezoelectric Ceramics Using the Single-Edge Precracked Beam Method

MURAKAMI Heihachiro, SHINDO Yasuhide, HORIGUCHI Katsumi, NARITA Fumio

2000　(35)　162-163　2000/03/11
Publisher: The Japan Society of Mechanical Engineers
Dynamic Problem of a Circular Inclusion in Antiplane Piezoelectricity

MORIBAYASHI Hirokazu, SHINDO Yasuhide, NARITA Fumio

11　322-325　1999/10/13
Anti-Plane Shear Crack in a Piezoelectric Layer Bonded to Dissimilar Half Spaces

NARITA Fumio, SHINDO Yasuhide, WATANABE Koji

JSME International Journal Ser. A Solid Mechanics and Material Engineering　42　(1)　66-72　1999/01/15
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1344-7912

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Following the theory of linear piezoelectricity, we consider the electroelastic problem for a piezoelectric layer with a crack bonded to two elastic half planes under antiplane shear loading. The crack parallel to the interfaces is in the mid-plane of the piezoelectric layer. Fourier transforms are used to reduce the problem to the solution of a pair of dual integral equations. The solution of the dual integral equations is then expressed in terms of a Fredholm integral equation of the second kind. Numerical values of the stress intensity factor for some piezoelectric laminates are obtained, and the results are plotted to display the electroelastic interactions.
A Cracked Piezoelectric Layer Sandwiched Between Two Half-Planes Under Anti-Plane Shear Loading

SHINDO Yasuhide, NARITA Fumio, WATANABE Koji

10　97-102　1998/10/23
Scattering of Love Waves by a Surface-Breaking Crack in Piezoelectric Layered Media

NARITA Fumio, SHINDO Yasuhide

JSME International Journal Ser. A Solid Mechanics and Material Engineering　41　(1)　40-48　1998/01/15
Publisher: The Japan Society of Mechanical Engineers
ISSN： 1344-7912

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Based on the dynamic theory of linear piezoelectricity, we investigate the scattering of Love waves by a surface-breaking crack in a layered piezoelectric solid. The piezoelectric layer is perfectly bonded to a half-space of a different elastic solid and the crack is normal to the free surface. Both cases of a partially broken layer and a completely broken layer are studied. By the use of Fourier transform techniques, the mixed boundary value problem is reduced to a singular integral equation. The singular integral equation is solved numerically to determine the dynamic stress intensity factor and the dynamic energy release rate as a function of a dimensionless frequency for various ratios of crack depth to layer thickness, and the results are presented in graphical form.

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Books and Other Publications 8

Piezoelectric Materials, Composites, and Devices Fundamentals, Mechanics, and Applications

Fumio Narita, Zhenjin Wang

Elsevier　2025/01

ISBN: 9780323996679
圧電材料の基礎と応用 : 原理・構造・デバイス

成田, 史生, 川上, 祥広

内田老鶴圃　2024/12

ISBN: 9784753650521
楽しく学ぶ破壊力学

成田史生, 大宮正毅, 荒木稚子

朝倉書店　2020/04
楽しく学ぶ材料力学

成田史生, 森本卓也, 村澤剛

朝倉書店　2017/04
Woven Composites, Computational and Experimental Methods in Structures - Vol. 6, M.H.Aliabadi (Ed.)

Y. Shindo, T. Takeda, F. Narita

Imperial College Press/World Scientific　2015
Handbook on Micromechanics and Nanomechanics, S. Li and X.-L. Gao (Eds.)

Yasuhide Shindo, Fumio Narita

Pan Stanford Publishing Pte. Ltd.　2013
Smart Actuation and Sensing Systems - Recent Advances and Future Challenges, Rocco Vertechy and Gabriele Vassura (Eds.)

Yasuhide Shindo, Fumio Narita

InTech Publishing Company　2012/09
Composite Materials Research Progress, Lucas P. Durand (Ed.)

Yasuhide Shindo, Fumio Narita

Nova Science Publishers, Inc.　2008

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Presentations 25

Effect of Magnetic Fields on the Fatigue Behavior of Cracked Magnetostrictive Materials in Three-Point Bending International-presentation

International Conference on Mechanics of Complex Solids and Fluids　2015/05/17
Three-Dimensional Cryomechanics Analysis of Satin Woven Carbon/Polymer Composites with Cracks International-presentation

23rd International Congress of Theoretical and Applied Mechanics　2012/08/20
Electromechanical Filed Concentrations and Polarization Switching Due to Interdigitated Electrodes in Piezoelectric Macro-Fiber Composites under Tension International-presentation

SPIE 18th Annual International Symposium on Smart Structures/NDE　2011/03/06
Nonlinear Bending Response of Terfenol-D/PZT Laminated Devices under Electromagnetic Fields International-presentation

SPIE 17th Annual International Symposium on Smart Structures/NDE　2010/03/07
Effect of Magnetic Field on the Bending Response of Magnetostrictive/Piezoelectric Laminated Actuators International-presentation

SPIE 16th Annual International Symposium on Smart Structures/NDE　2009/03/08
傾斜機能圧電センサ・アクチュエータの感知・応答特性

中川淳, 成田史生, 進藤裕英, 水戸裕也

第19回「電磁力関連のダイナミクス」シンポジウム　2007/05/16
Fatigue of Cracked PZT Ceramics in Three-Point Bending under Electric Fields International-presentation

F. Narita, Y. Shindo, F. Saito

SPIE’s International Symposium on Smart Structures and Materials, Active Materials: Behavior and Mechanics　2007/03/18
Electroelastic Field Concentrations and Frequency Properties of Rosen-Type Piezoelectric Transformers International-presentation

Smart Structures and Materials and NDE for Health Monitoring and Diagnostics, SPIE Event　2006/02/26
Nonlinear Bending Behavior of Functionally Graded Piezoelectric Actuators under Electric Fields

成田史生, 進藤裕英, 三上賢, 斉藤文利

日本機械学会2005年度年次大会　2005/09/19
極低温における平織ガラス－エポキシ積層材料のモードIはく離疲労き裂進展挙動

進藤裕英, 成田史生, 堀口勝三

日本機械学会東北支部第41期秋期講演会　2005/09/09
ローゼン型圧電トランスの電気弾性場集中と振動数特性

成田史生, 進藤裕英, 三上賢

第17回「電磁力関連のダイナミクス」シンポジウム　2005/06/22
電極を有する圧電材料システムの電気弾性場集中と分域回転

成田史生, 進藤裕英

日本機械学会M&M信州スプリングシンポジウム　2005/03/14
交流電場下における圧電積層アクチュエータの曲げと分域壁移動

成田史生, 進藤裕英, 三上賢

第54回理論応用力学講演会　2005/01/25
Analysis of Mode I Interlaminar Fracture and Damage Behavior of GFRP Woven Laminates at Cryogenic Temperatures

進藤裕英, 隅川真由美, 竹田智, 高野哲, 成田史生

日本機械学会第17回計算力学講演会　2004/11/18
Electroelastic Fields Concentrations and Polarization Switching by Circular Electrodes in Piezoelectric Disk Composites International-presentation

F. Narita, Y. Shindo, M. Karaiwa

21st International Congress of Theoretical and Applied Mechanics　2004/08/15
Analysis of Tensile Testing of a Soft Ferromagnetic Elastic Strip Containing a Central Crack under a Magnetic Field International-presentation

D. Sekiya, Y. Shindo, F. Narita, K. Horiguchi

21st International Congress of Theoretical and Applied Mechanics　2004/08/15
圧電トランスの電気破壊力学解析と分域回転

唐岩賢, 成田史生, 進藤裕英

日本機械学会M&M2004材料力学カンファレンス　2004/07/21
電極を有する積層圧電アクチュエータの電気弾性場集中と分域回転

進藤裕英, 成田史生, 堀口勝三

日本機械学会第16回計算力学講演会　2003/11/22
Electroelastic Bending and Polarization Switching of Piezoelectric Laminated Actuators International-presentation

F. Narita, Y. Shindo, K. Hayashi, M. Yoshida

Second MIT Conference on Computational Fluid and Solid Mechanics　2003/06/17
円形電極を有する圧電円板の電気弾性場集中と分域回転

成田史生, 吉田宗之, 進藤裕英, 唐岩賢, 堀口勝三

第15回「電磁力関連のダイナミックス」シンポジウム　2003/05/28
円板状き裂を有する圧電セラミックス円柱の衝撃応答

林森, 成田史生, 進藤裕英

第52回理論応用力学講演会　2003/01/28
圧電セラミックスの電気弾性破壊力学

成田史生, 進藤裕英, 堀口勝三

日本機械学会M&Mレイクサイドサマーシンポジウム　2002/08/07
Electroelastic Fracture Mechanics of Piezoelectric Ceramics International-presentation

F. Narita, Y. Shindo, K. Horiguchi

14th US National Congress of Theoretical and Applied Mechanics, Symposium on Electro-Magneto-Mechanics　2002/06/23
圧電セラミックスの破壊・分域回転特性評価

真柄安代, 吉田宗之, 進藤裕英, 成田史生, 堀口勝三

第14回「電磁力関連のダイナミックス」シンポジウム　2002/05/22
圧電応用デバイス信頼性・耐久性評価のための電気破壊力学

成田史生, 堀口勝三, 進藤裕英

第13回「電磁力関連のダイナミックス」シンポジウム　2001/06/21

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Industrial Property Rights 18

磁歪複合材料および磁歪複合材料の製造方法

王真金, 成田史生

特許7496981

Property Type: Patent
荷重センサおよび荷重検出装置

成田史生, 井上久美, 栗田大樹, 長名シオン,シティ, マストゥラ, ビンティ, ファクルッディン, 渡辺将仁, 千葉大喜, 小野寺隆一, 田山厳, 佐藤武信, 江幡貴司

特許7491540号

Property Type: Patent
野球用投球練習具

清水紀弘, 成田史生

特許1768807

Property Type: Design
チタン部材およびチタン部材の製造方法

栗田大樹, 成田史生

特許7362066

Property Type: Patent
ナノセルロースを含む複合糸の製造方法、ナノセルロースを含む複合糸および蚕用の餌

呉宸, 栗田大樹, 王真金, 成田史生

特許7289482

Property Type: Patent
圧電磁歪複合体および発電素子

古屋泰文, 成田史生

特許7267597

Property Type: Patent
推定装置、推定方法、及び、材料の製造方法

田邉匡生, 小山裕, 猪股宏, 渡邉賢, 成田史生, 栗田大樹

特許7257041

Property Type: Patent
発電装置およびこれを用いた施設の環境情報センシングシステム

成田史生, 槙原幹十朗, 橋本善一, 菊田純一, 阿部晋一

特許第7037781号

Property Type: Patent
振動発電装置

小野寺隆一, 田山巌, 佐藤武信, 江幡貴司, 成田史生

特許第6991685号

Property Type: Patent
複合強化型の磁歪複合材料及びその製造方法

成田史生, 古屋泰文, 表研次

特許6884299号

Property Type: Patent
振動発電装置およびアクチュエータ

成田史生, 小野寺隆一, 田山巌, 千葉大喜, 佐々達郎, 佐藤武信, 江幡貴司

特許第6653834号

Property Type: Patent
発明の名称：ナノセルロースを含む繊維または糸の製造方法、ナノセルロースを含む繊維または糸、および蚕用の餌

栗田大樹, 堀雅敏, 小林元気, 長澤淳彦, 成田史生

Property Type: Patent
発電用複合材料および発電用複合材料の製造方法

王真金, 丸山衡平, 成田史生

Property Type: Patent
磁歪材料、エネルギー変換部材およびその製造方法ならびに振動発電装置

栗田大樹, 成田史生, 渡辺将仁, 浦川潔, 佐藤武信, 佐々達郎, 千葉大喜, 廣谷真澄, 尾張尚幸, 田山厳, 江幡貴司

Property Type: Patent
圧電ＦＲＰセンサーとこれを用いたクラック検出システムと方法

久保田勇希, 余瑶楠, 栗田大樹, 成田史生

Property Type: Patent
磁歪材料の製造方法、磁歪材料およびエネルギー変換部材の製造方法

栗田大樹, 成田史生, 中島賢也, 渡辺将仁, 佐藤武信, 江幡貴司

Property Type: Patent
荷重センサおよび荷重検出装置

成田史生, 井上久美, 栗田大樹, 長名シオン,シティ, マストゥラ, ビンティ, ファクルッディン, 宮本直人, 渡辺将仁, 千葉大喜, 小野寺隆一, 田山厳, 佐藤武信, 江幡貴司

Property Type: Patent
エネルギー変換部材、振動発電装置、力センサー装置およびアクチュエータ

成田史生, 小野寺隆一, 田山巌, 千葉大喜, 佐々達郎, 佐藤武信, 江幡貴司

Property Type: Patent

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Research Projects 23

ナノ圧電粒子・植物繊維と蚕の連携技術創出－絹テキスタイル発電・センシングの開拓－

成田史生, 王真金, 栗田大樹

Category: 科研費挑戦的研究（開拓）

2025/04 - 2028/03
機能傾斜・最適化による新規圧電・磁歪複合材料の創成とエネルギー変換現象の解明

成田史生, 川上祥広, 荒木稚子, 栗田大樹, 森孝太郎, 宮本直人

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(A)

Institution: 東北大学

2022/04/01 - 2026/03/31
IoT社会を実現するマルチ環境発電材料・デバイス国際研究拠点形成

Offer Organization: 日本学術振興会

System: 研究拠点形成事業（A.先端拠点形成型）

2020/04 - 2025/03
磁歪繊維複合材料を用いた多機能ネジ型デバイスの開発

森孝太郎, 成田史生

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 基盤研究(C)

Institution: 茨城大学

2021/04/01 - 2024/03/31

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本研究は，軽量，高強度かつ力に対する感知機能を有し磁歪複合材料製のネジの開発を目的に，磁歪複合材料製ネジの感知・締結特性を理論的・実験的に解明するものである．また，感知・締結特性だけでなく，振動・衝撃による発電特性についても検討し，大量に配置することを前提とした，多機能なネジ型デバイスの設計理論・技術の確立も目指すものである．そこで，本年度は，FeCo長繊維を芯とした磁歪材料/エポキシ樹脂製ネジの作製および締結試験および理論計算を行い，感知特性の調査を行った．上記研究に関して，まず，FeCo長繊維を芯とした磁歪材料/エポキシ樹脂製ネジを作製した．ここで，FeCo長繊維に予荷重およびバイアス磁場を与えた状態で樹脂を硬化させることにより，ネジ内部に残留応力を発生させ，磁束密度変化量を向上させた．次に，締結試験を行い，軸方向ひずみおよびネジ先端の磁束密度変化を計測し，締付けトルクと軸力および磁束密度変化の関係を評価した．また，磁歪複合材料製ネジにバイアス磁場を印加した状態での締結試験も行い，バイアス磁場と磁束密度変化の関係についても調べ，試験時のバイアス磁場が及ぼす影響についても調査した．また，上記実験に理論計算結果を加え，作製した磁歪複合材料製ネジの機械的特性および締結特性についても評価した．本年度は以上の通り研究を実施した．今後も短繊維や粉末状の磁歪材料を用いた磁歪複合材料製ネジを作製・試験を行い，引き続き磁歪複合材料製のネジの電磁力学特性の解明およびネジ型デバイスの多機能化や応用可能性について検討していく．
Piezoelectric and Magnetostrictive Mechanical Design and Development of High Energy Conversion in Electronic Composite Materials

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

Category: Grant-in-Aid for Scientific Research (A)

Institution: Tohoku University

2019/04/01 - 2023/03/31
Development of Diodegradable Silk Protein Scaffolding Material and Application to Cell Culture Plates by 3D Printing

Narita Fumio

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Challenging Research (Pioneering)

Institution: Tohoku University

2019/06/28 - 2022/03/31

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First, this study showed that the enhanced mechanical properties of the cellulose nanofiber (CNF)/silk fibers are attributed to the improved alignment and enhanced dispersion of CNFs inside the silk fiber. Then, PEGDMA/silk fibroin (SF) hydrogels with varying concentrations of SF were developed by digital light projector. The elastic compressive modulus of the printed hydrogel had a wide range of values, suggesting that it could be a good substitute for various stem cells from cartilage, muscle tissue, fat, and bone.
圧電・磁歪効果を利用した機能性炭素繊維強化プラスチックの開発と飛行振動発電技術の創出

Offer Organization: 国立研究開発法人科学技術振興機構

System: 研究成果展開事業 A-STEP機能検証フェーズ

2019/10 - 2020/09
Development of High Performance Smart Composite Material with Enhancing Domain Density at the PZT/Magnetostrictive Interface for Designing Energy Harvesting, IoT Devices

FURUYA YASUBUMI

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2017/04/01 - 2020/03/31

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The purpose of this study is to develop the multi-functional smart materials and devices, and their practical application for sensor/actuator combining with wireless IoT network. First, we tried to fabricate the new materials of piezo/magnetostrictive laminated or fiber-reinforced composite which has synergetic effect of nano-domains scale multi-ferroics effect. This new material PZT/FeCo/laminated composite was proposed for patent in 2018 from Tohoku University. Then, electro-magnetic smart devices which have stress/strain sensor or micro-energy harvester under mechanical vibration. By using the developed sensor/actuator and energy harvesting devices, in final year of 2019, the verification of the experimental test of wireless IoT sensor network system was done by using three small wind-mills in the area of Fukaura-town and Hirosaki University of Aomori Prefecture and Tohoku University in Sendai. The time-dependent data could be monitored in cloud-style, which means successful.
Studies on the mechanisms of functional properties of the metal-based piezocomposites having extremely high compressive residual stress

ASANUMA HIROSHI

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Chiba University

2017/04/01 - 2020/03/31

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The metal-core piezoelectric fiber/aluminum composite is a unique piezoelectric composite that exhibits piezoelectricity even under the high compressive residual stress that occurs during embedding, however it is unknown about the stress state and the piezoelectric and mechanical characteristics under this stress. In this study, we conducted a survey to analyze the compressive stress field and evaluate the effect of improving the mechanical properties due to the stress, and obtained the following findings. 1) The compressive residual stress generated in the piezoelectric fiber by FEM analysis was about 1 GPa at the interface of the fiber, which was in agreement with the experimental results. From this result, it became possible to predict the stress state occurring in the piezoelectric fiber. 2) Compressive stress is triaxial stress, which is predominant in the longitudinal direction. This residual stress improves the fracture stress of piezoelectric ceramics up to about 1.6 times.
Development of piezoelectric nanoparticle dispersed polymer composite materials for special temperature energy harvesting and electrodynamic behavior evaluation

Narita Fumio

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2016/04/01 - 2019/03/31

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In this research, the thermal energy harvesting and piezoelectric response behavior for the lead-free piezoelectric composite materials were studied from both numerical simulation and experiment. Specifically, piezoelectric/Cu unimorph and piezoelectric nanoparticle dispersed polymer films were fabricated, and output voltage measurement due to temperature change and piezoelectric response evaluation were performed. Moreover, multi-physics numerical simulation was carried out and theoretical examination was added to the experimental result. Furthermore, the material and structure optimization of piezoelectric composites was discussed.
逆磁歪効果を利用した衝撃発電ヒール・パンプスの開発～スポーツシューズへの展開を目指して～

Offer Organization: 国立研究開発法人科学技術振興機構

System: 地域産学バリュープログラム

2017/10 - 2018/09
Understanding of electromagneto-mesomechanical properties and efficiency/power consumption improvement of biocompatible Fe-Ga magnetostrictive material systems

SHINDO Yasuhide, NARITA Fumio, TAKEDA Tomo

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

Category: Grant-in-Aid for Challenging Exploratory Research

Institution: Tohoku University

2014/04/01 - 2015/03/31

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In order to develop design criteria to ensure the reliability and long-life capability of biocompatible self- powered electromagnetic devices, we investigated the effects of microstructures, localized magnetic domain switching, magnetic domain wall motion etc. on the power output (energy harvesting) and fracture/fatigue properties of advanced magnetostrictive material systems under magnetic fields theoretically (multi-physics numerical simulation) and experimentally. Based on the study on the power output and fracture/fatigue properties, optimal materials and structures of magnetostrictive systems were discussed.
Mesomechanical design/development and efficiency/environmental load improvement of smart piezoelectric material and thin-film systems

SHINDO Yasuhide, NARITA Fumio, TAKEDA Tomo

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2012/04/01 - 2015/03/31

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In order to provide meso-mechanical design criteria and development technique of novel eco-friendly smart devices, we investigated the detection/response characteristics and fracture/fatigue behavior of piezoelectric material and thin-film systems from both a theoretical and experimental point of view using multi-physics approach. Electromechanical interactions, micro- and nano-structures, chemical composition, additive element, and fabrication time/temperature were considered. As a result, a study on the meso-strength and function evaluations of the smart piezoelectric material and thin-film systems was established.
Performance evaluation and band gap improvement of barium titanate electronic composites with secondary batteries

NARITA Fumio

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2012/04/01 - 2015/03/31

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In order to provide meso-mechanical design criteria of novel eco-friendly smart electronic composite materials, we investigated the detection/response characteristics and power generation properties of barium titanate electronic composites from both a theoretical and experimental point of view using multi-physics approach. Electromechanical interactions, micro- and nano-structures, chemical composition, additive element, and fabrication time/temperature were considered. Based on the study on the detection/response characteristics and power generation properties of the electronic composites, optimal materials and structures were selected.
Performance and Lifetime Enhancements due to Detection/Response/Memory and Fracture/Damage Controls of Smart Electronic Composite Materials

NARITA Fumio, SHINDO Yasuhide

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2008 - 2010

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In order to develop design criteria and strength/function assessment methods of smart electronic composite materials, we investigated the detection/response/memory and fracture/damage properties of advanced piezoelectric composites. We discussed theoretically and experimentally the electromechanical behavior of functionally graded piezoelectric materials, piezoelectric fiber/epoxy composites and piezoelectric laminates, and obtained the beneficial results for the design of high performance and long life composite materials.
Meso-scale device design and strength/functional evaluation of advanced piezoelectric material and thin-film systems

SHINDO Yasuhide, NARITA Fumio

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2006 - 2009

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In order to develop design criteria to ensure the reliability and long-life capability of novel smart electronic systems, high performance micro/nano devices, etc., we investigated the effects of electric fields, domain wall motion and polarization switching on the electromechanical and fracture/fatigue properties of advanced piezoelectric material and thin-film systems theoretically and experimentally.
超磁歪材料・薄膜システムの内部微視構造変化を考慮した電磁破壊・メゾ力学

進藤裕英, 成田史生, 堀口勝三

Offer Organization: 日本学術振興会

System: 科学研究費助成事業萌芽研究

Category: 萌芽研究

Institution: 東北大学

2005 - 2007

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本研究は,知的・電子材料システムの設計・開発及び信頼性・耐久性評価に資することを目的に,先端超磁歪材料・薄膜システムの電磁破壊力学特性を,マイクロ・ナノ構造及び磁区等との相互作用を考慮して解明したものである.得られた成果を要約すると以下の通りである. 1.磁歪材料Terfeno1-D(Tb_<0.3>Dy_<0.7>Fe_<1.9>)層と金属(SUS316・Cu・Al)基板から構成される超磁歪積層アクチュエータを作製した.そして,アクチュエータに磁場を印加し,伸びひずみを計測して,磁歪特性を評価した.また,有限要素解析(圧磁係数に及ぼす磁場の影響考慮)により,実験結果に理論的検討を加え,磁区回転に起因する非線形磁気力学特性解明に成功した.さらに,基板の先端たわみ及び内部応力に及ぼす磁場の影響を明らかにした. 2. (1)超磁歪/圧電積層デバイスの電磁力学特性に及ぼす内部微視構造変化(磁壁移動・分域壁移動等)の影響解明を目指し,傾斜機能圧電センサ・アクチュエータの動的曲げ試験・非線形有限要素解析を行った.そして,感知・応答特性に及ぼす電場・周波数及び分域壁移動等の影響を解明した. (2)Terfenol-D層と圧電(PZT)板から構成される超磁歪/圧電積層デバイスを作製し,磁場による伸びひずみを計測して,磁歪特性を明らかにした.また,非線形有限要素解析(圧磁係数に及ぼす磁場の影響考慮)を行い,圧電板の先端たわみ・伸び,出力電圧及び内部応力に及ぼす磁場及び超磁歪層厚・積層構造の影響について検討を加えた.
電子複合材料の構造・界面制御と知能デバイス化に関する研究

成田史生

Offer Organization: 日本学術振興会

System: 科学研究費助成事業若手研究(B)

Category: 若手研究(B)

Institution: 東北大学

2005 - 2007

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本研究は,センサ・アクチュエータ等を一体融合化した知能電子デバイスの設計・開発に資することを目的に,圧電効果を有する電子複合材料の感知・応答特性評価を数値シミュレーション・実験両面から行ったものである.得られた成果を要約すると以下の通りである. 1.(1)交流電場下における両端固定傾斜機能圧電アクチュエータの非線形動的曲げ挙動を理論・実験両面から明らかにした.有限要素解析は,圧電層の分域壁移動を考慮して行い,たわみ・音圧及び内部応力に及ぼす交流電圧・傾斜組成分布の影響を解明した.また,音圧を測定し,解析結果と実験結果を比較・検討して,解析モデルの妥当性を検証した. (2)交流電場下における両端固定傾斜機能圧電トランスデューサを対象に,非線形動的曲げ・出力電圧挙動に関する有限要素解析(分域壁移動を考慮)・試験を行い,音圧・出力電圧及び内部電場・応力に及ぼす交流電圧・傾斜組成分布の影響を解明した. (3)片持ち傾斜機能圧電トランスデューサを対象に,交流電場・集中荷重による先端たわみ・出力電圧及び内部応力を有限要素解析(分域壁移動を考慮)し,非線形動的曲げ・出力電圧挙動を解明した.また,先端たわみ・出力電圧を測定し,解析結果と比較・考察した. 2.(1)円環状き裂を有する圧電繊維複合材料の軸対称問題を取り上げ,き裂の電気弾性挙動を理論的に解明した. (2)1-3圧電コンポジットの電気力学場集中及び周波数特性に関する数値シミュレーション・実験を行い,静的・動的電場誘起の変位・内部応力に及ぼす角柱・円柱状圧電ロッド体積含有率の影響を解明した.
Evaluation of Cryogenic Fracture Strength of Material Systems for Superconducting Applications using Notched Bending Small Test Specimen Techniques

HORIGUCHI Katsumi, SHINDO Yasuhide, NARITA Fumio, TAMURA Hitoshi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

Category: Grant-in-Aid for Scientific Research (C)

2005 - 2006

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Design and development of superconducting applications require basic research on cryogenic/magnetic fracture mechanics. In this research project, the cryogenic/magnetic fracture strength of material systems for superconducting applications is investigated using the notched bending small specimens. From the numerical considerations and experimental results, the following can be concluded : 1.We perform the fracture toughness tests on austenitic stainless steels and weldments in cryogenic high magnetic field environments and examine the effect of magnetic field on the cryogenic fracture properties 2.We carry out the cryogenic fracture tests on woven glass fiber reinforced plastic(GFRP) laminates and examine the influence of specimen size on the strength. During the tests, acoustic emission monitoring is employed to characterize the damage development. The specimen fracture behavior is also simulated numerically using the finite element technique. 3.We study the cryogenic fracture behavior of bulk superconductors and discuss the effect of inclusions and voids on the crack growth properties.
Characterization of Electric Fracture and Fatigue Properties of Advanced Piezoelectric Material Systems

SHINDO Yasuhide, HORIGUCHI Katsumi, NARITA Fumio

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: TOHOKU UNIVERSITY

2002 - 2005

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In most of the applications of sensors and actuators in the field of smart structures and devices, piezoelectric ceramics are subjected to both high mechanical stresses and electric fields hence, it is important for reliability and durability to investigate the fracture and fatigue properties of piezoelectric ceramics and composites under electromechanical loading. In this research project, the electromechanical properties of advanced piezoelectric material systems are investigated. From the theoretical considerations and experimental data for piezoelectric material systems, the following results can be obtained : 1. We analyze the electroelastic problems for cracked piezoelectric material systems. The effect of electric field on the fracture mechanics parameters (energy release rate, energy density factor, fatigue crack growth rate) is calculated. We also develop a finite element procedure which allows to compute the polarization switching near the crack tip, and discuss the nonlinear fracture properties of piezoelectric material systems. 2. (1) We perform the indentation fracture, single-edge precracked-beam, and double torsion tests on piezoelectric ceramics, and discuss the electric fracture properties. We also employ the nonlinear finite element analyses to study the effect of localized polarization switching on the fracture mechanics parameters. (2) We investigate the electric fracture and polarization switching properties of piezoelectric ceramics utilizing the modified small punch technique. 3. We perform an experimental and analytical study on the static and cyclic fatigue properties of piezoelectric ceramics under electromechanical loading, using three-point bending method. 4. (1) We study the effect of applied voltage on the electroelastic field concentrations ahead of electrodes in piezoelectric actuators. (2) We examine the electromechanical response of piezoelectric bimorphs, and discuss the effects of do electric field and polarization switching on the bending properties. We also present the results on the nonlinear behavior due to domain wall motion for laminated and functionally graded piezoelectric actuators under ac electric field.
先端圧電材料システムの分域回転・結晶粒再配向を考慮した電気破壊・メゾ力学

進藤裕英, 成田史生, 堀口勝三

Offer Organization: 日本学術振興会

System: 科学研究費助成事業萌芽研究

Category: 萌芽研究

Institution: 東北大学

2001 - 2003

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本研究は,先端圧電材料システムの電気破壊力学特性を,マイクロ構造及び分域・分極ならびに欠陥(き裂等)との相互作用を考慮して解明したものである.すなわち,知的・電子材料システム,マイクロシステム等の信頼性・耐久性評価に資することを目的に,電気破壊・メゾ力学的研究を実施し,以下の成果を得た. 1.き裂を有する圧電積層材料の電気弾性・有限要素解析を行い,エネルギー解放率等の破壊力学パラメータに及ぼす分域回転及び負荷電場の影響を明らかにした. 2.(1)圧電セラミックスを対象に,MSP(改良型小型パンチ)試験・有限要素解析を行い,破壊荷重・MSPエネルギー・最大ひずみエネルギー密度に及ぼす180°,90°分域回転及び負荷電場の影響を解明した.また,有限要素解析と実験から得られたMSPエネルギーを比較・検討し,MSP試験片の分域回転領域を示して考察を加えた. (2)三層圧電積層片持ちはり(バイモルフ型アクチュエータ)の非線形曲げ試験・有限要素解析を行い,たわみに及ぼす分域回転及び負荷電場の影響を明らかにした.また,三層圧電アクチュエータを対象に,両端単純支持三点曲げ試験及び理論・有限要素解析を行い,変位・分域回転に及ぼす力学的・電気的負荷の影響を解明した. (3)内部電極を有する圧電積層材料の電極端近傍応力・電束密度を理論的に解明した.また,内部・表面電極を有する多層圧電アクチュエータの電極端近傍における電気弾性場集中に及ぼす印加電圧・分域回転の影響及び非線形挙動を理論的・実験的に解明した.さらに,円形電極の場合についても同様に解明し,考察を加えた. 3.圧電セラミックスのDT(ダブルトーション)試験を行い,破壊荷重に及ぼす負荷電場の影響を解明した.また,DT試験の有限要素解析を行い,破壊力学パラメータに及ぼす分域回転及び負荷電場の影響を解明して,実験結果に理論的検討を加えた.
き裂を有する圧電複合材料の電気弾性力学に関する理論的研究

成田史生

Offer Organization: 日本学術振興会

System: 科学研究費助成事業奨励研究(A)

Category: 奨励研究(A)

Institution: 東北大学

2000 - 2001

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本研究は、圧電複合材料の電気破壊強度・機能設計に資することを目的に、き裂を有する圧電複合材料の電気弾性解析を行ったものである。本年度は、き裂の電気弾性解析モデルとして界面近傍の内部き裂、界面き裂等を設定し、圧電複合材料の電気破壊力学解析を行い、応力拡大係数・エネルギー解放率・エネルギー密度等の破壊力学パラメータに及ぼす分極・電場及び負荷(引張り・せん断)の影響を解明した。得られた成果を要約すると以下の通りである。 1.き裂を有する圧電積層材料の平面ひずみ電気弾性解析を行い、破壊力学パラメータに及ぼす電場の影響を検討しており、一部興味ある結果を得ている。 2.(1)円形圧電介在物が弾性母材に接合されている圧電複合材料を対象に、2個の対称界面き裂による面外断波散乱問題を理論解析し、電気破壊動力学的挙動を解明した。また、円振動数に対する動的応力拡大係数・動的エネルギー解放率を数値計算し、圧電特性の影響を考慮した。 (2)圧電繊維複合材料の電気破壊力学的挙動解明を目指し、円板状き裂を有する圧電円柱の電気弾性挙動について検討し、破壊力学パラメータに及ぼす電場の影響を解明・考察した。 (3)上記電気破壊力学解析結果を踏まえ、圧電繊維複合材料の電気破壊評価に関する基礎的研究を進め、一部興味ある結果を得ている。 3.分極方向が異なる2つの圧電セラミックスからなる界面き裂を有する圧電積層材料の電気弾性解析を行い、き裂先端近傍における電気弾性場の特異挙動解明に成功している。また、き裂を有する圧電複合材料の混合モード電気弾性挙動解明を目指して検討を進めており、一部興味ある結果を得ている。
Characterization of Electric Fracture and Deformation Behavior of Advanced Piezoelectric Material Systems

SHINDO Yasuhide, NARITA Fumio, HORIGUCHI Katsumi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: TOHOKU UNIVERSITY

1999 - 2001

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In most of the applications as sensors and actuators in ffie field of smart structures and devices, piezoelectric materials are subjected to both high mechanical stresses and intense electric fields, hence, it is important for reliability and durability to investigate the fracture and deformation behavior of piezoelectric materials under mechanical and electrical loads. In this research project, the electric fracture and deformation behavior of advanced piezoelectric material systems is investigated. From the theoretical considerations and experimental data for piezoelectric material systems, the following results can be obtained : 1. We analyze the linear electroelastic problems for cracked piezoelectric ceramics. The effects of electroelastic interactions and piezoelectric properties on the fracture mechanics parameters (stress intensity factor, energy release rate, energy density, fatigue crack growth rate) are calculated. We also discuss the electrical boundary condition along the crack faces. 2. (a) We consider the multiple scatterlng of antiplane shear waves in a piezoelectric fibrous composite with slip at interfaces. Numerical calculations for some piezoelectric fibrous composites are obtained and the effects of interfacial slippages and electroelastic interactions on the phase velocity and attenuation of coherent plane wave, and the effective piezoelectrically stiffened elastic constant are discussed. We also analyze the dynamic electroelastic problem for a piezoelectric ceramic having a circular piezoelectric inclusion. Numerical results for the dynamic stress and electric field concentrations are computed, and they are plotted in terms of the piezoelectric material constants, frequency, and applied electric field. (b) We consider the problem of horizontally polarized shear waves scattered from arc-shaped interface cracks between a circular piezoelectric fiber and its surrounding elastic matrix. Numerical values on the dynamic stress intensity factor, dynamic energy release rate, scattering cross section and electrical signal are obtained and the results are presented graphically to display the electroelastic interactions. 3. We perform the indentation fracture (IF) and single-edge precracked beam (SEPB) tests on piezoelectric ceramics, and examine the influence of applied electric field on the fracture and deformation properties. We also employ the finite element analyses to calculate the stress intensity factor and energy release rate. The numerical findings are then correlated with the experimental results. 4. We perform the modified small punch (MSP) tests on piezoelectric ceramics, and obtain the fracture initiation loads under different electric fields. We also model the electromechanical response of piezoelectric ceramics under mechanical and electric fields using a finite element approach, and calculate the deflection and critical MSP energy. Attempts are made to compare the results of finite element analysis with experimental observations.

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