Details of the Researcher

PHOTO

Takeshi Yamaguchi
Section
Graduate School of Engineering
Job title
Professor
Degree

  • 博士（工学）（東北大学）

  • 修士（工学）（東北大学）

Research History 7

  • 2022/04 - Present
    Tohoku University　Graduate School of Engineering　Professor

  • 2020/04 - Present
    Tohoku University

  • 2015/04 - 2022/03
    Tohoku University　Graduate School of Biomedical Engineering　Associate Professor

  • 2011/01 - 2022/03
    Graduate School of Engineering　Associate Professor

  • 2010/03 - 2011/01
    University of Toronto

  • 2008/03 - 2010/12
    Graduate School of Engineering　Assistant Professor

  • 2000/10 - 2008/02
    Graduate School of Engineering　Assistant Professor

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Education 2

  • Tohoku University　Graduate School, Division of Engineering　機械電子工学専攻

    - 2000/09

  • Tohoku University　Faculty of Engineering　機械電子工学科

    - 1999/03

Committee Memberships 34

  • 日本トライボロジー学会　ITC Sendai 2019実行委員会委員

    2018/11 - Present

  • 日本トライボロジー学会　国際企画委員会幹事

    2018/06 - Present

  • 日本トライボロジー学会　新領域・新分野開拓研究会委員

    2018/06 - Present

  • 日本トライボロジー学会　教育講習委員会委員

    2015/06 - Present

  • International Ergonomics Association　Member of Technical Committee, Slips,Trip, and Falls

    2015/04 - Present

  • 日本機械学会　校閲委員

    2014/04 - Present

  • 姿勢と歩行研究会　世話人

    2014/03 - Present

  • 文部科学省科学技術政策研究所科学技術動向研究センター　科学技術専門家ネットワーク専門調査員

    2014/02 - Present

  • 日本設計工学会　東北支部会計幹事

    2013/06 - Present

  • 日本設計工学会　東北支部商議員

    2013/06 - Present

  • トライボロジー秋の学校実行委員会　実行委員

    2012/06 - Present

  • （社）日本トライボロジー学会表彰委員会　委員

    2012/06 - Present

  • トライボロジー秋の学校実行委員会　実行委員

    2012/06 - Present

  • 日本トライボロジー学会表彰委員会　委員

    2012/06 - Present

  • 日本トライボロジー学会運営委員会若手による運営企画委員会　委員

    2010/05 - Present

  • 仙台市地域連携フェロー事業　地域連携アシスタントフェロー

    2008/04 - Present

  • 仙台市地域連携フェロー事業　地域連携アシスタントフェロー

    2008/04 - Present

  • （社）日本トライボロジー学会編集委員会　編集委員

    2005/04 - Present

  • (社)日本トライボロジー学会第一種研究会　摩擦の実験講座委員

    2004/07 - Present

  • 日本ボブスレー・リュージュ連盟ボブスレー強化委員会　強化事業スタッフ

    2003/04 - Present

  • 日本ボブスレー・リュージュ連盟ボブスレー強化委員会　強化事業スタッフ

    2003/04 - Present

  • 第23回二宮杯全日本飛行機選手権 審査委員

    2017/11 - 2017/11

  • 姿勢と歩行研究会　担当世話人会長

    2015/03 - 2015/03

  • 日本トライボロジー学会　若手による運営企画小委員会

    2010/06 - 2012/05

  • 日本トライボロジー学会運営委員会若手による運営企画委員会　委員

    2010/05 - 2012/05

  • （社）日本機械学会東北支部 第47期総会・講演会 実行委員会　委員

    2011/06 - 2012/04

  • 日本機械学会東北支部 第47期総会・講演会 実行委員会　委員

    2011/06 - 2012/04

  • 日本機械学会　2010年度（第88期）トピックス委員

    2010/04 - 2012/03

  • 「JASTシニアアドバイザー」運営小委員会　委員

    2009/06 - 2010/05

  • 日本トライボロジー学会第一種研究会　摩擦の実験講座委員

    2004/07 - 2010/05

  • 日本トライボロジー学会　編集委員会幹事

    2006/06 - 2007/05

  • 日本トライボロジー学会編集委員会　編集委員

    2005/06 - 2007/05

  • 社団法人日本トライボロジー学会編集委員会　幹事

    2006/05 - 2007/04

  • 「JASTシニアアドバイザー」運営小委員会　委員

    2009/06 -

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Professional Memberships 6

  • JAPAN ERGONOMICS SOCIETY

  • 姿勢と歩行研究会

  • International society for posture & gait research

  • 日本設計工学会

  • Japanese Society of Tribologists

  • The Japan Society of Mechanical Engineers

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Research Interests 6

  • 人間工学

  • Soft material

  • Tribology

  • Biomehanics

  • fall

  • gait

Research Areas 3

  • Life sciences / Rehabilitation science /

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Machine elements and tribology /

  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Design engineering /

Awards 33

  1. 技術賞

    2024/05　一般社団法人日本トライボロジー学会

  2. 学生優秀発表指導教員賞

    2023/05　公益社団法人日本設計工学会

  3. 2021年度人間工学グッドプラクティス賞 優秀賞

    2021/05　日本人間工学会

  4. 東北大学ディスティングイッシュトリサーチャー

    2020/04

  5. Best Poster Award

    2019/09　Organizing Committee of International Tribology Conference Sendai 2019

  6. （公社）日本設計工学会平成30年度秋季講演会学生優秀発表指導教員賞

    2019/05　公益社団法人日本設計工学会

  7. （公社）日本設計工学会平成29年度秋季大会講演会学生優秀発表指導教員賞

    2018/05　公益社団法人日本設計工学会

  8. The 2017 Paper Award of Tribology Online

    2018/05　Japanese Society of Tribologists　Development of new tapping tool covered with nickel/abrasive particles composite film for preventing chip snarling and tool service life extension

  9. Discover Japan Award

    2017/09　Discover Japans誌 高橋編集長

  10. （公社）日本設計工学会優秀発表賞

    2017/05/20　公益社団法人日本設計工学会　センサシューズによる歩行中の靴底接地面内の必要摩擦係数分布の解明

  11. 公益社団法人日本設計工学会2016年度奨励賞

    2017/05　Development of cart-type friction measurement device for evaluation for slip resistance of floor sheets

  12. 学生優秀発表指導教員賞

    2016/05/27　公益社団法人日本設計工学会　平成２７年度秋季研究発表講演会学生優秀発表賞（石垣航）

  13. 学生優秀発表指導教員賞

    2016/05　（公社）日本設計工学会　平成２７年度秋季研究発表講演会学生優秀発表賞（田辺航）

  14. 日本機械学会東北支部技術研究賞

    2016/03/11　日本機械学会東北支部　切りくず巻付き抑制効果を有する長寿命・高速加工用切削タップ の開発・事業化

  15. 日本工学教育協会JSEE AWARD

    2015/06/18　（公社）日本工学教育協会

  16. 学生優秀発表指導教員賞

    2015/05/29　公益社団法人日本設計工学会　平成26年度秋季研究発表講演会での野口敬央の発表指導に対して

  17. 学生優秀発表指導教員賞

    2015/05/29　公益社団法人日本設計工学会　平成26年度秋季研究発表講演会での樋口裕成の発表指導に対して

  18. The 2014 Paper Award of Tribology Online

    2015/05/28　Japanese Society of Tribologists　Experimental Analysis of the Distribution of Traction Coefficient in the Shoe-Ground Contact Area during Running

  19. 平成27年度科学技術分野の文部科学大臣表彰 若手科学者賞

    2015/04/15　文部科学大臣 下村博文

  20. 2014年度東北大学総長教育賞

    2015/03　東北大学総長　東北大学・カタールサイエンスキャンパス

  21. 2013年度日本トライボロジー学会技術賞

    2014/05/20　一般社団法人 日本トライボロジー学会　移動型靴/床静・動摩擦係数測定システムの開発

  22. 第5回ものづくり日本大賞優秀賞

    2013/09　経済産業省　水や油で濡れた危険床面でもすべ りにくい歩行安 全性に優れた超耐 滑シューズの開発

  23. 日本機械学会奨励賞（研究）

    2012/04/20　一般社団法人日本機械学会

  24. 日本機械学会東北支部技術研究賞

    2012/03/13　日本機械学会東北支部

  25. Scienceday AWARD 2011 産総研ありす賞

    2011/07/15　独立行政法人産業技術総合研究所東北センター所長 原田晃

  26. 第15回青葉工学研究奨励賞

    2010/01/23　財団法人青葉工学振興会　トライボロジーとバイオメカニクスの融合による歩行形態図の構築と応用に関する研究

  27. Field Best Presentation Awards, World Tribology Congress 2009

    2009/10　The Organizing Committee of World Tribology Congress (WTC) IV　Tribological and kinematic analysis of walking-style for reducing the peak traction coefficient between shoe sole and floor

  28. The 2008 Paper Award of Tribology Online, Japanese Society of Tribologists

    2009/05/19　社団法人日本トライボロジー学会

  29. 2007年度（社）日本トライボロジー学会奨励賞

    2008/05/13　(社）日本トライボロジー学会　人間の歩行におけるトライボロジー

  30. 日本トライボロジー学会技術賞

    2005/05/30　社団法人日本トライボロジー学会　転がり摩擦駆動”車いす電動ユニット”の開発

  31. 15th International Conference on Wear of Materials Best Poster Award

    2005/04/28　15th International Conference on Wear of Materials　Wear control of drive tip of ultrasonic motor for precise positioning

  32. (財)みやぎ産業科学振興基金 第5回研究奨励賞

    2004/05/31　(財)みやぎ産業科学振興基金　超音波リニアモータ駆動型高速・超精密位置決めステージシステムの開発に関する研究

  33. 日本機械学会第76期全国大会機素潤滑設計部門卒業研究コンテスト 優秀賞

    1999/07/27　日本機械学会　液晶配向ラビング用布の評価システムの開発

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Papers 181

  1. Increasing friction of tread rubber under lubrication by adjusting groove shape to control fluid flow

    Arata Ishizako, Toshiaki Nishi, Takeshi Yamaguchi

    Tribology International　205　110531-110531　2025/05

    Publisher: Elsevier BV

    DOI： 10.1016/j.triboint.2025.110531 　

    ISSN： 0301-679X

  2. Impact of slip distance between fingertips and ball on baseball pitching performance under different friction conditions International-journal Peer-reviewed

    Takeshi Yamaguchi, Souta Suzuki, Shinnosuke Suzuki, Toshiaki Nishi, Takehiro Fukuda, Daiki Nasu

    Scientific Reports　15　(1)　2025/03/27

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41598-025-93632-y 　

    eISSN： 2045-2322

  3. Influence of Surface Free Energy of Liquids and Liquid Distributions on the Friction of Paper Wipers Peer-reviewed

    Toshiaki Nishi, Takeshi Yamaguchi

    2025/01

  4. Effects of foot–ground friction and age-related gait changes on falls during walking: a computational study using a neuromusculoskeletal model Peer-reviewed

    Naoto Izumi, Takashi Yoshida, Toshiaki Nishi, Kei Masani, Takeshi Yamaguchi

    Scientific Reports　14　(1)　2024/11/28

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41598-024-81361-7 　

    eISSN： 2045-2322

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    Abstract We used a neuromusculoskeletal model of bipedal walking to examine the effects of foot–ground friction conditions and gait patterns on slip- and trip-induced falls. We developed three two-dimensional neuro-musculoskeletal models in a self-organized manner representing young adults, elderly non-fallers, and elderly fallers. We simulated walking under different foot-ground friction conditions. The static friction coefficient between the foot and the ground was varied from 0.05 to 2.0. Under low friction conditions, the three gait models demonstrated slip-induced falls. The elderly faller model experienced the most slip. This is because the RCOF was higher in the elderly faller model due to its short stride length but much smaller foot clearance. Under high friction conditions, only the elderly faller model demonstrated trip-induced falls. Based on the analysis using the margin of stability, the forward postural stability of the model gradually decreased under high-friction conditions, with the toe of the swing foot contacting the ground and subsequently falling forward. These results imply that there is an optimal coefficient of friction for the ground to prevent slip- and trip-induced falls by people with less stable gaits, which may provide new insights into the design of shoes and floor surfaces for the elderly.

  5. Comparing the Ground Reaction Forces, Toe Clearances, and Stride Lengths of Young and Older Adults Using a Novel Shoe Sensor System Peer-reviewed

    Hide Matsumoto, Masaki Tomosada, Toshiaki Nishi, Yoshihiro Sasaki, Ryota Sakurai, Takeshi Yamaguchi

    Sensors　24　(21)　6871-6871　2024/10/26

    Publisher: MDPI AG

    DOI： 10.3390/s24216871 　

    eISSN： 1424-8220

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    In this study, we developed a lightweight shoe sensor system equipped with four high-capacity, compact triaxial force sensors and an inertial measurement unit. Remarkably, this system enabled measurements of localized three-directional ground reaction forces (GRFs) at each sensor position (heel, first and fifth metatarsal heads, and toe) and estimations of stride length and toe clearance during walking. Compared to conventional optical motion analysis systems, the developed sensor system provided relatively accurate results for stride length and minimum toe clearance. To test the performance of the system, 15 older and 8 young adults were instructed to walk along a straight line while wearing the system. The results reveal that compared to the young adults, older adults exhibited lower localized GRF contributions from the heel and greater localized GRF contribution from the toe and fifth metatarsal locations. Furthermore, the older adults exhibited greater variability in their stride length and smaller toe clearance with greater variability compared to the young adults. These results underscore the effectiveness of the proposed gait analysis system in distinguishing the gait characteristics of young and older adults, potentially replacing traditional motion capture systems and force plates in gait analysis.

  6. Slip-resistance of rubbers and polymer fibers as shoe sole on dry and wet ice surfaces International-journal Peer-reviewed

    Kei Shibata, Akihiro Ohnishi, Satoshi Asahina, Takeshi Yamaguchi

    Tribology International　198　109867　2024/10

    DOI： 10.1016/j.triboint.2024.109867 　

    ISSN： 0301-679X

  7. Wear resistance of spark plasma sintered Fe-based BMG reinforced with Al2O3 Peer-reviewed

    L. Zarazúa-Villalobos, T. Yamaguchi, K. Ogawa, P. Piriyakulkij, H. Kato, N. Mary

    Journal of Non-Crystalline Solids　636　123010-123010　2024/07

    Publisher: Elsevier BV

    DOI： 10.1016/j.jnoncrysol.2024.123010 　

    ISSN： 0022-3093

  8. Visualization of strain distribution in rubber bulk during friction International-journal

    Toshiaki Nishi, Kyohei Ueno, Tomohiro Nomoto, Shinya Sugisawa, Daiki Shin, Ken Yamaguchi, Isao Kuwayama, Takeshi Yamaguchi

    Scientific Reports　14　(1)　13530-13530　2024/06/12

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41598-024-64271-6 　

    eISSN： 2045-2322

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    Abstract This study employed a digital image correlation method (DICM) to experimentally quantify horizontal strain distribution in silicone rubber bulk during horizontal displacement against a stainless-steel sphere with/without glycerol. The strain distribution at different depth levels was measured by capturing the position of white powders in transparent rubber bulk. The experimental results indicated that each point in the rubber bulk moved while describing a horizontal loop during horizontal displacement depending on the position and lubrication conditions. This caused changes in the horizontal strain during horizontal displacement. These results suggest that the hysteresis term could be caused by changes in the vertical and horizontal strains.

  9. Effect of orientation and hardness of rubber tread block on the friction coefficient under glycerol lubrication and its underlying mechanisms International-journal

    Arata Ishizako, Toshiaki Nishi, Takeshi Yamaguchi

    Tribology International　109904-109904　2024/06

    Publisher: Elsevier BV

    DOI： 10.1016/j.triboint.2024.109904 　

    ISSN： 0301-679X

  10. Machine learning prediction of footwear slip resistance on glycerol-contaminated surfaces: A pilot study International-journal International-coauthorship Peer-reviewed

    Kaylie Lau, Takeshi Yamaguchi, Kei Shibata, Toshiaki Nishi, Geoff Fernie, Atena Roshan Fekr

    Applied Ergonomics　117　104249-104249　2024/05

    Publisher: Elsevier BV

    DOI： 10.1016/j.apergo.2024.104249 　

    ISSN： 0003-6870

  11. High friction of rubber caused by negative fluid pressure under glycerol lubrication International-journal Peer-reviewed

    Arata Ishizako, Toshiaki Nishi, Takeshi Yamaguchi

    Tribology International　192　109213-109213　2024/04

    Publisher: Elsevier BV

    DOI： 10.1016/j.triboint.2023.109213 　

    ISSN： 0301-679X

  12. High Friction of Paper Wipers in Partially Wet Conditions: Effect of Three-dimensional Nonuniform Wetting International-journal Peer-reviewed

    Toshiaki Nishi, Shoma Kobayashi, Takeshi Yamaguchi

    Tribology International　109426-109426　2024/02

    Publisher: Elsevier BV

    DOI： 10.1016/j.triboint.2024.109426 　

    ISSN： 0301-679X

  13. Comparison of sensitivity among dynamic balance measures during walking with different tasks International-journal International-coauthorship Peer-reviewed

    Shunsuke Yamagata, Takeshi Yamaguchi, Masahiro Shinya, Matija Milosevic, Kei Masani

    Royal Society Open Science　11　(1)　2024/01/31

    Publisher: The Royal Society

    DOI： 10.1098/rsos.230883 　

    eISSN： 2054-5703

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    Although various measures have been proposed to evaluate dynamic balance during walking, it is currently unclear which measures are most sensitive to dynamic balance. We aimed to investigate which dynamic balance measure is most sensitive to detecting differences in dynamic balance during walking across various gait parameters, including short- and long-term Lyapunov exponents ( λs and λl ), margin of stability (MOS), distance between the desired and measured centre of pressure (dCOP–mCOP) and whole-body angular momentum (WBAM). A total of 10 healthy young adults were asked to walk on a treadmill under three different conditions (normal walking, dual-task walking with a Stroop task as an unstable walking condition, and arm-restricted walking with arms restricted in front of the chest as another unstable walking condition) that were expected to have different dynamic balance properties. Overall, we found that λs of the centre of mass velocity, λs of the trunk velocity, λs of the hip joint angle, and the magnitude of the mediolateral dCOP–mCOP at heel contact can identify differences between tasks with a high sensitivity. Our findings provide new insights into the selection of sensitive dynamic balance measures during human walking.

  14. Prediction of Three-Directional Ground Reaction Forces during Walking Using a Shoe Sole Sensor System and Machine Learning International-journal Peer-reviewed

    Sensors　23　(21)　8985　2023/11

    Publisher:

    DOI： 10.3390/s23218985 　

  15. Influences of Wettability and Geometry on Adhesion Force between Sportswear Fabric and Human/artificial Skin International-journal Peer-reviewed

    Toshiaki Nishi, Atsushi Matsumura, Manami Koshida, Tatsufumi Matsumoto, Takeshi Yamaguchi

    Tribology Online　18　(6)　353-364　2023/10

    DOI： 10.2474/trol.18.353 　

  16. Effect of the end-face corner radius of a rubber block on the friction coefficient and fluid-free gap under glycerin lubrication

    Arata Ishizako, Hide Matsumoto, Takeshi Yamaguchi

    Tribology International　108473-108473　2023/04

    Publisher: Elsevier BV

    DOI： 10.1016/j.triboint.2023.108473 　

    ISSN： 0301-679X

  17. Effect of grip-enhancing agents on sliding friction between a fingertip and a baseball. International-journal International-coauthorship Peer-reviewed

    3　92　2022/12

    Publisher:

    DOI： 10.1038/s43246-022-00317-4 　

  18. Effects of age on dynamic balance measures and their correlation during walking across the adult lifespan International-journal International-coauthorship Peer-reviewed

    Takeshi Yamaguchi, Kei Masani

    Scientific Reports　12　(1)　2022/08/22

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41598-022-18382-7 　

    eISSN： 2045-2322

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    Abstract In this study, we aimed to discover (1) the effects of age on dynamic balance measures, including the margin of stability (MOS), whole-body angular momentum (H), and misalignment of the desired and measured centers of pressure (dCOP and mCOP, respectively) in the anteroposterior (AP) and mediolateral (ML) directions, (2) the relationship between gait parameters and these balance measures, and (3) the relationships between these balance measures. We used the kinetic and kinematic data of 151 participants aged 20–77 years from a publicly available database. Participants were divided into three groups: young, middle-aged, and old. The step width of the old group was higher than that of the young group. Age-related differences in dynamic measures were found in the ML direction and not in the AP direction: MOS, peak-to-peak range of H, and dCOP–mCOP in the old group were greater than in the young group. ML MOS positively correlated with the frontal peak-to-peak range of H. The ML peak-to-peak range of H positively correlated with ML dCOP–mCOP across the adult lifespan. Our findings provide new insights for understanding the effects of age on dynamic balance and the relationships between the metrics. Older adults walked with a larger step width, resulting in a large stability margin in the ML direction, although with increased moment and momentum around the center of mass in the frontal plane.

  19. Impact of rubber block end-face corner radius on the friction coefficient between rubber blocks and a glass plate under dry and lubrication conditions

    Arata Ishizako, Masaki Tomosada, Kazuo Hokkirigawa, Takeshi Yamaguchi

    Tribology International　107705-107705　2022/06

    Publisher: Elsevier BV

    DOI： 10.1016/j.triboint.2022.107705 　

    ISSN： 0301-679X

  20. Wear behavior of thermoplastic urethane for the outer soles of spike shoes International-journal Peer-reviewed

    Toshiaki Nishi, Takeshi Yamaguchi, Kei Shibata, Yuhei Ito, Kazuo Hokkirigawa

    Wear　490-491　204105-204105　2022/02

    Publisher: Elsevier BV

    DOI： 10.1016/j.wear.2021.204105 　

    ISSN： 0043-1648

  21. Development of high slip-resistant footwear outsole using rubber surface filled with activated carbon/sodium chloride International-journal Peer-reviewed

    Toshiaki Nishi, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Scientific Reports　12　(1)　2022/01

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41598-021-04102-0 　

    eISSN： 2045-2322

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    <title>Abstract</title>High slip-resistant footwear outsoles can reduce the risk of slip and fall on wet and icy surfaces. Falls on wet and icy surfaces can cause serious life-threatening injuries, especially for older adults. Here we show that footwear outsoles using the rubbers filled with activated carbon or sodium chloride produce higher friction force and reduce the slip rate in walking. We have identified that small depressions were formed on outsole materials filled with activated carbon or sodium chloride during friction between the rubber and surface leading to some air ingress into the interface. While there are air bubbles between the rubber and surface, real contacts are surrounded by water with negative pressure (Laplace pressure). It is considered that the negative pressure promotes real contact formation, which causes high friction. We consider that the outsole materials filled with activated carbon or sodium chloride can reduce the risk of slip-and-fall accidents.

  22. The Future of Footwear Friction Invited

    Kurt E. Beschorner, Yue Li, Takeshi Yamaguchi, William Ells, Richard Bowman

    Proceedings of the 21st Congress of the International Ergonomics Association (IEA 2021)　841-855　2022

    Publisher: Springer International Publishing

    DOI： 10.1007/978-3-030-74614-8_103 　

    ISSN： 2367-3370

    eISSN： 2367-3389

  23. Effects of Foot–Floor Friction on Trip-Induced Falls During Shuffling Gait: A Simulation Study

    Takeshi Yamaguchi, Kenichi Nakatani, Tomoki Hirose, Takashi Yoshida, Kei Masani

    Proceedings of the 21st Congress of the International Ergonomics Association (IEA 2021)　856-860　2022

    Publisher: Springer International Publishing

    DOI： 10.1007/978-3-030-74614-8_104 　

    ISSN： 2367-3370

    eISSN： 2367-3389

  24. Friction behavior between an artificial skin block and a glass plate under unlubricated and partly/completely water-lubricated conditions

    Toshiaki Nishi, Takeshi Yamaguchi, Kei Shibata, Kazuo Hokkirigawa

    Tribology International　163　107179-107179　2021/11

    Publisher: Elsevier BV

    DOI： 10.1016/j.triboint.2021.107179 　

    ISSN： 0301-679X

  25. Effect of foot-floor friction on the external moment about the body center of mass during shuffling gait: a pilot study International-journal Peer-reviewed

    Takeshi Yamaguchi, Kei Shibata, Hiromi Wada, Hiroshi Kakehi, Kazuo Hokkirigawa

    Scientific Reports　11　(1)　2021/07

    Publisher: Springer Science and Business Media LLC

    DOI： 10.1038/s41598-021-91683-5 　

    eISSN： 2045-2322

    More details Close

    <title>Abstract</title>Herein, we investigated the effect of friction between foot sole and floor on the external forward moment about the body center of mass (COM) in normal and shuffling gaits. Five young male adults walked with normal and shuffling gaits, under low- and high-friction surface conditions. The maximum external forward moment about the COM (MEFM-COM) in a normal gait appeared approximately at initial foot contact and was unaffected by floor condition. However, MEFM-COM in a shuffling gait under high-friction conditions exceeded that under low-friction conditions (<italic>p</italic> &lt; 0.001). Therein, MEFM-COM increased with an increasing utilized coefficient of friction at initial foot contact; this effect was weaker during a normal gait. These findings indicate that increased friction between foot sole and floor might increase tripping risk during a shuffling gait, even in the absence of discrete physical obstacles.

  26. Friction behavior of silicone rubber hemisphere under non-uniform wetting states: With water droplets in air or air bubbles in water Peer-reviewed

    Toshiaki Nishi, Takeshi Yamaguchi, Kei Shibata, Kazuo Hokkirigawa

    Tribology International　155　106769-106769　2021/03

    Publisher: Elsevier BV

    DOI： 10.1016/j.triboint.2020.106769 　

    ISSN： 0301-679X

  27. Effect of Combining Hydrophobic and Hydrophilic Treatments on Slip Resistance for Wet Flat Glass Flooring

    Kei Shibata, Hirotaka Oguni, Hiromi Wada, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Proceedings of the 21st Congress of the International Ergonomics Association (IEA 2021)　682-688　2021

    Publisher: Springer International Publishing

    DOI： 10.1007/978-3-030-74605-6_86 　

    ISSN： 2367-3370

    eISSN： 2367-3389

  28. Optimizing the frictional behavior of partially wetting soft contacts as measured with hydrogel covered silicones Peer-reviewed

    Toshiaki Nishi, Takeshi Yamaguchi, Kei Shibata, Kazuo Hokkirigawa

    Tribology International　153　106586-106586　2020/08

    Publisher: Elsevier BV

    DOI： 10.1016/j.triboint.2020.106586 　

    ISSN： 0301-679X

  29. Effects of Porosity and Fraction of SEBS on Dry Sliding Friction of EVA Foams for Sports Shoe Sole Applications International-journal Peer-reviewed

    Takeshi Yamaguchi, Pyriyaki Pathomchat, Kei Shibata, Toshiaki Nishi, Junichiro Tateishi, Kazuo Hokkirigawa

    Tribology Transactions　accepted　(6)　1067-1075　2020/08

    Publisher: Informa UK Limited

    DOI： 10.1080/10402004.2020.1789797 　

    ISSN： 1040-2004

    eISSN： 1547-397X

  30. Effect of the Porosity Distribution on Dry Sliding Friction and Wear of Cross-Linked Ethylene Vinyl Acetate Foams With a Skin Layer International-journal Peer-reviewed

    Toshiaki Nishi, Takeshi Yamaguchi, Kei Shibata, Kazuo Hokkirigawa

    Biotribology　22　100128-100128　2020/06

    Publisher: Elsevier BV

    DOI： 10.1016/j.biotri.2020.100128 　

    ISSN： 2352-5738

  31. Dry sliding friction and Wear behavior of thermoplastic polyurethane against abrasive paper Peer-reviewed

    Sho Sato, Takeshi Yamaguchi, Kei Shibata, Toshiaki Nishi, Kenta Moriyasu, Kenichi Harano, Kazuo Hokkirigawa

    Biotribology　23　100130-100130　2020/05

    Publisher: Elsevier BV

    DOI： 10.1016/j.biotri.2020.100130 　

    ISSN： 2352-5738

  32. Effects of rosin powder application on friction behavior between finger pad and baseball International-journal Peer-reviewed

    Takeshi Yamaguchi, Naoto Yamakura, Shinnosuke Murata, Takehiro Fukuda, Daiki Nasu

    Frontiers in Sports and Active Living　2　30　2020/04

    DOI： 10.3389/fspor.2020.00030 　

  33. Comparison of lower limb joint moment and power during turning gait between young and old adults using hierarchical Bayesian inference International-journal International-coauthorship Peer-reviewed

    Yuto Fukuda, Kei Masani, Takeshi Yamaguchi

    Journal of Biomechanics　103　109702　2020/03

    DOI： 10.1016/j.jbiomech.2020.109702 　

  34. RBセラミックス粒子を配合した自転車用ゴムブレーキの雨天時における高速走行制動性能 Peer-reviewed

    柴田圭, 伊藤和哉, 五十嵐條, 山口健, 内田寿, 堀切川一男

    日本機械学会論文集　86　(881)　19-00397　2020/01/25

    DOI： 10.1299/transjsme.19-00397 　

  35. Influence of unforced dewetting and enforced wetting on real contact formation and friction behavior between rubber hemisphere and glass plate during contact and sliding process Peer-reviewed

    Toshiaki Nishi, Takeshi Yamaguchi, Kei Shibata, Kazuo Hokkirigawa

    Tribology International　141　105921　2020/01

    DOI： 10.1016/j.triboint.2019.105921 　

  36. Effects of Particulate and Fibrous Carbon Filler Combinations on the Tribological Behavior of a Polyacetal Composite under Water Lubrication Peer-reviewed

    Hiroaki Yoshida, Kei Shibata, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Tribology Online　14　(5)　321-326　2019/12

    DOI： 10.2474/trol.14.321 　

  37. Distribution of the local required coefficient of friction in the shoe–floor contact area during straight walking: A pilot study Peer-reviewed

    YAMAGUCHI Takeshi

    Biotribology　in press　2019/07

    DOI： 10.1016/j.biotri.2019.100101 　

  38. Tribological Behavior of Polyacetal Composite Lubricated in Sodium Hypochlorite Solution Peer-reviewed

    Kei Shibata, Keigo Toyabe, Ryota Araki, Takeshi Yamaguchi, Masahiko Kawabata, Kazuo Hokkirigawa

    Wear　428-429　272-278　2019/06

    Publisher: Elsevier BV

    DOI： 10.1016/j.wear.2019.03.021 　

    ISSN： 0043-1648

  39. Friction Control of Resin Foam/Rubber Laminated Block Material Peer-reviewed

    Kenta Moriyasu, Tsuyoshi Nishiwaki, Kei Shibata, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Tribology International　136　548-555　2019/04

    DOI： 10.1016/j.triboint.2019.04.024 　

  40. Effect of Groove Width and Depth and Urethane Coating on Slip Resistance of Vinyl Flooring Sheet in Glycerol Solution Peer-reviewed

    Kei Shibata, Iori Warita, Takeshi Yamaguchi, Mamoru Hinoshita, Koichi Sakauchi, Seiko Matsukawa, Kazuo Hokkirigawa

    Tribology International　135　89-95　2019/03

    DOI： 10.1016/j.triboint.2019.02.033 　

  41. Effects of Age-related Changes in Step Length and Step Width on the Required Coefficient of Friction during Straight Walking Peer-reviewed

    Takeshi Yamaguchi, Kei Masani

    Gait & Posture　69　195-201　2019/03

    DOI： 10.1016/j.gaitpost.2019.02.005 　

  42. Sliding friction characteristics of styrene butadiene rubbers with varied surface roughness under water lubrication Peer-reviewed

    Tatsuya Ido, Takeshi Yamaguchi, Kei Shibata, Kosuke Matsuki, Keita Yumii, Kazuo Hokkirigawa

    Tribology International　2019/01

    DOI： 10.1016/j.triboint.2019.01.015 　

  43. Microstructure, mechanical and tribological properties of rice husk ceramics: effect of carbonizing temperature Peer-reviewed

    Kei Shibata, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Tribology Transactions　Accepted　(2)　218-229　2019/01

    Publisher: Informa UK Limited

    DOI： 10.1080/10402004.2018.1535103 　

    ISSN： 1040-2004

    eISSN： 1547-397X

  44. Decrease in required coefficient of friction due to smaller lean angle during turning in older adults Peer-reviewed

    Takeshi Yamaguchi, Ryosuke Okamoto, Kazuo Hokkirigawa, Kei Masani

    Journal of Biomechanics　74　163-170　2018/06/06

    Publisher: Elsevier Ltd

    DOI： 10.1016/j.jbiomech.2018.04.038 　

    ISSN： 1873-2380 0021-9290

  45. Tribological behavior of polyacetal composite filled with rice bran ceramics particles under water lubrication Peer-reviewed

    Kei Shibata, Takeshi Ii, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Journal of Composite Materials　52　(15)　2075-2084　2018/06/01

    Publisher: SAGE Publications Ltd

    DOI： 10.1177/0021998317740198 　

    ISSN： 1530-793X 0021-9983

  46. Tribological Behavior of Rice Bran Ceramics in a Vacuum Environment Peer-reviewed

    Takeshi Yamaguchi, Kei Shibata, Kazuo Hokkirigawa

    Tribology Transactions　61　(5)　911-919　2018/05

    DOI： 10.1080/10402004.2018.1442541 　

  47. Effect of Temperature on the Dry Sliding Friction and Wear of Rice Bran Ceramics against Different Counterpart Materials Peer-reviewed

    Takeshi Yamaguchi, Kei Shibata, Kazuo Hokkirigawa

    Tribology Transactions　61　(2)　279-286　2018/03/04

    Publisher: Taylor and Francis Inc.

    DOI： 10.1080/10402004.2017.1317376 　

    ISSN： 1547-397X 1040-2004

  48. Effect of Porosity and Normal Load on Dry Sliding Friction of Polymer Foam Blocks Peer-reviewed

    Takeshi Yamaguchi, Takehiko Sugawara, Motoi Takahashi, Kei Shibata, Kenta Moriyasu, Tsuyoshi Nishiwaki, Kazuo Hokkirigawa

    Tribology Letters　66　(1)　34　2018/03/01

    Publisher: Springer New York LLC

    DOI： 10.1007/s11249-018-0988-z 　

    ISSN： 1023-8883

  49. Relationship between slip angle in ramp test and coefficient of friction values at shoe-floor interface measured with cart-type friction measurement device Peer-reviewed

    Takeshi Yamaguchi, Ryo Yamada, Iori Warita, Kei Shibata, Akihito Ohnishi, Atsushi Sugama, Mamoru Hinoshita, Koichi Sakauchi, Seiko Matsukawa, Kazuo Hokkirigawa

    Journal of Biomechanical Science and Engineering　13　(1)　17-00389　2018

    Publisher: Japan Society of Mechanical Engineers

    DOI： 10.1299/jbse.17-00389 　

    ISSN： 1880-9863

  50. Dry sliding friction of ethylene vinyl acetate blocks: Effect of the porosity Peer-reviewed

    Takeshi Yamaguchi, Takehiko Sugawara, Motoi Takahashi, Kei Shibata, Kenta Moriyasu, Tsuyoshi Nishiwaki, Kazuo Hokkirigawa

    TRIBOLOGY INTERNATIONAL　116　264-271　2017/12

    DOI： 10.1016/j.triboint.2017.07.022 　

    ISSN： 0301-679X

    eISSN： 1879-2464

  51. Effect of rubber block height and orientation on the coefficients of friction against smooth steel surface lubricated with glycerol solution Peer-reviewed

    Takeshi Yamaguchi, Yu Katsurashima, Kazuo Hokkirigawa

    TRIBOLOGY INTERNATIONAL　110　96-102　2017/06

    DOI： 10.1016/j.triboint.2017.02.015 　

    ISSN： 0301-679X

    eISSN： 1879-2464

  52. Relationship between sliding-induced wear and severity of sliding contact for polyamide 66 filled with hard filler Peer-reviewed

    Kei Shibata, Mei Fukuda, Takeshi Yamaguchi, Kazuo Hokkirigawa

    PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY　231　(6)　783-790　2017/06

    DOI： 10.1177/1350650116679048 　

    ISSN： 1350-6501

    eISSN： 2041-305X

  53. Required coefficient of friction in the anteroposterior and mediolateral direction during turning at different walking speeds Peer-reviewed

    Takeshi Yamaguchi, Akito Suzuki, Kazuo Hokkirigawa

    PLOS ONE　12　(6)　e0179817　2017/06

    DOI： 10.1371/journal.pone.0179817 　

    ISSN： 1932-6203

  54. Effect of coefficient of friction at the sliding zone of chip-tool interface on chip curl diameter and secondary shear zone thickness during tapping process Peer-reviewed

    Yasuyoshi Saito, Takeshi Yamaguchi, Ryo Itagaki, Kei Shibata, Takeshi Kubo, Wataru Watanabe, Satoru Oyama, Kazuo Hokkirigawa

    Journal of Advanced Mechanical Design, Systems and Manufacturing　11　(1)　1-13　2017

    Publisher: Japan Society of Mechanical Engineers

    DOI： 10.1299/jamdsm.2017jamdsm0007 　

    ISSN： 1881-3054

  55. Textural characteristics and friction properties of facial tissues Peer-reviewed

    Kei Shibata, Naoya Yamai, Takeshi Yamaguchi, Hidenori Yorozu, Shuta Yasui, Wataru Tanabe, Kazuo Hokkirigawa

    Tribology Online　12　(5)　238-246　2017

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.12.238 　

    ISSN： 1881-2198 1881-218X

  56. Friction and wear behavior of stainless steel fabricated by powder bed fusion process under oil lubrication Peer-reviewed

    Kei Shibata, Wataru Ishigaki, Takuma Koike, Tomoki Umetsu, Takeshi Yamaguchi, Kazuo Hokkirigawa

    TRIBOLOGY INTERNATIONAL　104　183-190　2016/12

    DOI： 10.1016/j.triboint.2016.08.037 　

    ISSN： 0301-679X

    eISSN： 1879-2464

  57. Effect of friction at chip-tool interface on chip geometry and chip snarling in tapping process Peer-reviewed

    Yasuyoshi Saito, Shoki Takiguchi, Takeshi Yamaguchi, Kei Shibata, Takeshi Kubo, Wataru Watanabe, Satoru Oyama, Kazuo Hokkirigawa

    INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE　107　60-65　2016/08

    DOI： 10.1016/j.ijmachtools.2016.05.004 　

    ISSN： 0890-6955

    eISSN： 1879-2170

  58. Tribological behavior of polyacetal filled with particulate or fibrous filler under water lubrication, Peer-reviewed

    Kei Shibata, Riku Kitamura, Takeshi Ii, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Final Papers of 16th Nordic Symposium on Tribology　2016/06

  59. Development of cart-type friction measurement device for evaluation for slip resistance of floor sheets Peer-reviewed

    Kei Shibata, Shunta Abe, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Journal of Japan Society for Design Engineering　2016/06

    DOI： 10.14953/jjsde.2016.2686 　

  60. Misalignment of the Desired and Measured Center of Pressure Describes Falls Caused by Slip during Turning Peer-reviewed

    Takeshi Yamaguchi, Hironari Higuchi, Hiroshi Onodera, Kazuo Hokkirigawa, Kei Masani

    PLOS ONE　11　(5)　e0155418　2016/05

    DOI： 10.1371/journal.pone.0155418 　

    ISSN： 1932-6203

  61. Contribution of center of mass-center of pressure angle tangent to the required coefficient of friction in the sagittal plane during straight walking Peer-reviewed

    Takeshi Yamaguchi, Kei Masani

    Biotribology　5　16-22　2016/03/01

    Publisher: Elsevier Ltd

    DOI： 10.1016/j.biotri.2015.12.002 　

    ISSN： 2352-5738

  62. Improvement in mixed lubrication characteristics of electromagnetic clutch coated with DLC-Si film by controlling surface roughness and providing micro-groove Peer-reviewed

    Junji Ando, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Tribology Online　11　(1)　13-23　2016

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.11.13 　

    ISSN： 1881-2198 1881-218X

  63. Development of a new tapping tool covered with nickel/abrasive particles composite film for preventing chip snarling and tool service life extension Peer-reviewed

    Yasuyoshi Saito, Takeshi Yamaguchi, Kei Shibata, Yuki Kadota, Takeshi Kubo, Wataru Watanabe, Kazuo Hokkirigawa

    Tribology Online　11　(2)　81-87　2016

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.11.81 　

    ISSN： 1881-2198 1881-218X

  64. Friction and wear properties of PEEK resin filled with RB ceramics particles under water lubricated condition Peer-reviewed

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    Tribology Online　11　(6)　653-660　2016

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.11.653 　

    ISSN： 1881-2198 1881-218X

  65. Efficacy of a rubber outsole with a hybrid surface pattern for preventing slips on icy surfaces Peer-reviewed

    Takeshi Yamaguchi, Jennifer Hsu, Yue Li, Brian E. Maki

    APPLIED ERGONOMICS　51　9-17　2015/11

    DOI： 10.1016/j.apergo.2015.04.001 　

    ISSN： 0003-6870

    eISSN： 1872-9126

  66. Mechanism of Prevention of Chip Snarling on Tapping Tool Covered with Nickel-Phosphorus/Abrasive Particles Composite Film Peer-reviewed

    Yasuyoshi Saito, Yuki Kadota, Shoki Takiguchi, Takeshi Yamaguchi, Kei Shibata, Takeshi Kubo, Wataru Watanabe, Satoru Oyama, Kazuo Hokkirigawa

    Proceedings of International Tribology Conference, TOKYO 2015　2015/09

  67. Study on Wear of Polyamide 66 Composites Filled with Particulate or Fibrous Filler Peer-reviewed

    Kei Shibata, Moeko Kishi, Mei Fukuda, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Proceedings of International Tribology Conference, TOKYO 2015　2015/09

  68. Footwear width and balance-recovery reactions: a new approach to improving lateral stability in older adults Peer-reviewed

    Takeshi Yamaguchi, Kenneth C. Cheng, Sandra M. McKay, Brian E. Maki

    Gerontechnology　13　(3)　359-367　2015/08

    DOI： 10.4017/gt.2015.13.3.008.00 　

  69. Evaluation for slip resistance of floor sheets and shoe sole with newly developed mobile friction measurement system Peer-reviewed

    Kei Shibata, Shunta Abe, Takeshi Yamaguchi, Kazuo Hokkirigawa

    The Proceedings of the 19th Triennial Congress of the International Ergonomics Association　535　2015/08

  70. Development of Mobile Measurement System of Static and Dynamic Coefficient of Friction for Shoe-Floor Interface

    Shunta Abe, Kei Shibata, Takeshi Yamaguchi, Kazuo Hokkirigawa

    The Proceedings of the 19th Triennial Congress of the International Ergonomics Association　536　2015/08

  71. Study on rubber tread block design for high slip reisistance on liquid–contaminated condition Peer-reviewed

    Takeshi Yamaguchi, Yu Katsurashima, Kei Shibata, Kazuo Hokkirigawa

    The Proceedings of the 19th Triennial Congress of the International Ergonomics Association　527　2015/08

  72. 米ぬかを原料とする硬質多孔性炭素材料を用いた電車用カーボン系すり板の性能評価 Peer-reviewed

    三島潤一郎, 赤荻剛, 大瀧紘介, 柴田圭, 山口健, 堀切川一男

    電気学会論文誌D（産業応用部門誌）　135　(4)　426-431　2015/04

    DOI： 10.1541/ieeejias.135.426 　

  73. Development of carbon contact strip using RB ceramics Invited Peer-reviewed

    Junichiro Mishima, Tsuyoshi Akaogi, Kosuke Ohtaki, Kei Shibata, Takeshi Yamaguchi, Kazuo Hokkirigawa

    IEEJ Transactions on Industry Applications　135　(4)　426-431　2015/04/01

    Publisher: Institute of Electrical Engineers of Japan

    DOI： 10.1541/ieejias.135.426 　

    ISSN： 1348-8163 0913-6339

  74. Hokkirigawa and Shibata Laboratory/Yamaguchi Laboratory, Tohoku University

    K. Hokkirigawa, T. Yamaguchi, K. Shibata

    Toraibarojisuto/Journal of Japanese Society of Tribologists　60　(6)　363-364　2015

    Publisher: Japanese Society of Tribologists

    ISSN： 0915-1168

  75. Controlling water-based or oil-based film between shoes and the floor to prevent slips and falls Peer-reviewed

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    Hydrated Materials: Applications in Biomedicine and the Environment　127-144　2015/01/01

    Publisher: Pan Stanford Publishing Pte. Ltd.

    DOI： 10.4032/9789814463232 　

  76. Friction and wear behavior of polyamide 66 composites filled with rice bran ceramics under a wide range of Pv values Peer-reviewed

    Kei Shibata, Takeshi Yamaguchi, Moeko Kishi, Kazuo Hokkirigawa

    Tribology Online　10　(2)　213-219　2015

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.10.213 　

    ISSN： 1881-2198 1881-218X

  77. Magnesium carbonate and rosin powders stabilize sliding motion between rubber-gloved human hand and grasped cylindrical bar Peer-reviewed

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    JOURNAL OF ADVANCED MECHANICAL DESIGN SYSTEMS AND MANUFACTURING　9　(3)　JAMDSM0026　2015

    DOI： 10.1299/jamdsm.2015jamdsm0026 　

    ISSN： 1881-3054

  78. THE ROLE OF FRICTIONAL WORK IN TRIBOLOGICAL BEHAVIOR OF POLYAMIDE 66 COMPOSITES CONTAINING RICE BRAN CERAMICS PARTICLES OR GLASS BEADS Invited Peer-reviewed

    K. SHIBATA, T. YAMAGUCHI, M. KISHI, K. HOKKIRIGAWA

    TRIBOLOGIA – Finnish Journal of Tribology　1　(32)　33-40　2014/11

  79. Tribological behavior of polyamide 66/rice bran ceramics and polyamide 66/glass bead composites Peer-reviewed

    Kei Shibata, Takeshi Yamaguchi, Kazuo Hokkirigawa

    WEAR　317　(1-2)　1-7　2014/09

    DOI： 10.1016/j.wear.2014.04.019 　

    ISSN： 0043-1648

    eISSN： 1873-2577

  80. Development of a High Slip-resistant Footwear Outsole Using a Hybrid Rubber Surface Pattern Invited Peer-reviewed

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    INDUSTRIAL HEALTH　52　(5)　414-423　2014/09

    DOI： 10.2486/indhealth.2014-0105 　

    ISSN： 0019-8366

    eISSN： 1880-8026

  81. Development of new tapping tool covered with nickel/abrasive particles composite film Peer-reviewed

    Yasuyoshi Saito, Takeshi Yamaguchi, Kei Shibata, Yuki Kadota, Takeshi Kubo, Wataru Watanabe, Kazuo Hokkirigawa

    Proceedings of NORDTRIB2014　USB memory　2014/06

  82. The role of frictional work in tribological behavior of polyamide 66 composites containing hard particles Peer-reviewed

    Kei Shibata, Takeshi Yamaguchi, Moeko Kishi, Kazuo Hokkirigawa

    Proceedings of NORDTRIB2014　USB memory　2014/06

  83. Tribological behavior of RH ceramics made from rice husk sliding against stainless steel, alumina, silicon carbide, and silicon nitride Peer-reviewed

    Kei Shibata, Takeshi Yamaguchi, Kazuo Hokkirigawa

    TRIBOLOGY INTERNATIONAL　73　187-194　2014/05

    DOI： 10.1016/j.triboint.2014.01.021 　

    ISSN： 0301-679X

    eISSN： 1879-2464

  84. Development of High Slip-Resistant Footwear Outsole Using Hybrid Rubber Surface Pattern to Prevent Slips and Falls on Contaminated Floors Peer-reviewed

    Takeshi Yamaguchi, Kenichi Kasuga, Satoru Ishizawa, Kazuo Hokkirigawa

    Proceedings of International Conference on Fall Prevention and Protection 2013　241-246　2013/10/23

  85. DLC-Si被覆電磁クラッチの表面粗さ制御と表面油溝付与による混合潤滑特性の向上 Peer-reviewed

    安藤淳二, 山口健, 堀切川一男

    トライボロジスト　58　(9)　685-694　2013/09

    Publisher:

    ISSN： 0915-1168

  86. Frictional behavior of Particulate Anti-Slip Agents for Hands and Fingers

    Takeshi Yamaguchi, Toshihiro Shimakura, Takahiro Kawasaki, Kazuo Hokkirigaw

    Extended abstracts of WTC 2013　425　2013/09

  87. Tribological Properties of PEEK Resin Filled with RB Ceramics Particles under Water Lubrication

    Takeshi Yamaguchi, Jingeul Kim, Yohei Fujii, Kazuo Hokkirigawa

    Extended abstracts of WTC 2013　422　2013/09

  88. The Effect of Resin Foam/Rubber Thickness Ratio on Frictional Behavior of Shoe Sole Material

    Kenta Moriyasu, Tsuyoshi Nishiwaki, Kei Shibata, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Extended abstracts of WTC 2013　290　2013/09

  89. Friction and Wear Behavior of Rice Bran Ceramics under Vacuum Environment

    Kei Shibata, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Extended abstracts of WTC 2013　419　2013/09

  90. Friction and Wear Behavior of Polyamide 66 Composites Filled with Rice Bran Ceramics Slid against Stainless Steel

    Kei Shibata, Takeshi Yamaguchi, Ryota Ifuku, Moeko Kishi, Kazuo Hokkirigawa

    Extended abstracts of WTC 2013　421　2013/09

  91. RBセラミックス粒子を充填したPEEK複合材料の水潤滑下における摩擦・摩耗特性 Peer-reviewed

    山口健, 堀切川一男

    トライボロジスト　58　(7)　49-57　2013/07

  92. Desired center of pressure describes falls caused by induced slips

    Takeshi Yamaguchi, Kei Masani, Shinya Fukuzawa, Hiroshi Onodera, Kazuo Hokkirigawa

    Abstracts of 2nd Joint World Congress ISPGR/Gait & Mental Function　2013/06

  93. Gait assessment using desired center of pressure: How robotics concept matches human gait

    Kei Masani, Takeshi Yamaguchi, Hiroshi Onodera

    Abstracts of 2nd Joint World Congress ISPGR/Gait & Mental Function　2013/06

  94. Kinematics of center of mass and center of pressure predict friction requirement at shoe-floor interface during walking Peer-reviewed

    Takeshi Yamaguchi, Masaru Yano, Hiroshi Onodera, Kazuo Hokkirigawa

    GAIT & POSTURE　38　(2)　209-214　2013/06

    DOI： 10.1016/j.gaitpost.2012.11.007 　

    ISSN： 0966-6362

  95. Improvement in mixed lubrication characteristics of electromagnetic clutch coated with DLC-Si film by controlling surface roughness and providing micro-groove

    Junji Ando, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Toraibarojisuto/Journal of Japanese Society of Tribologists　58　(9)　685-694　2013

    ISSN： 0915-1168

  96. Study on estimation of contact pressure distribution at the rubber sphere - Glass plate interface based on luminance distribution analysis Peer-reviewed

    Kenta Moriyasu, Tsuyoshi Nishiwaki, Kei Shibata, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Nihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C　79　(807)　4464-4473　2013

    Publisher: Japan Society of Mechanical Engineers

    DOI： 10.1299/kikaic.79.4464 　

    ISSN： 0387-5024

  97. Experimental Analysis of Distribution of Traction Coefficient between Shoe Sole and Ground Surface in Running Peer-reviewed

    Kenta Moriyasu, Tsuyoshi Nishiwaki, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Tribology Online　7　(4)　267-273　2012/12/31

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.7.267 　

    ISSN： 1881-2198

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    Relationship between shoe grip properties and distributions of traction coefficient, which is obtained from horizontal ground reaction force (GRF) divided by normal GRF, were experimentally investigated during running. The experiments were conducted with sensor shoes mounted miniature triaxial force sensors for the measurement of GRF distributions in contact area. In order to clarify influence of the grip property on GRF vectors distributions and traction coefficient distributions, two typed sensor shoes having different outer sole materials with high/low friction coefficients were developed. The results showed that traction coefficients for the low grip typed shoe decreased in the whole contact area at the end of stance phase during running. Furthermore, it was confirmed that contact area, directions of GRF vectors and traction coefficients locally changed depending on the grip property. As a result of relationship between distributions of propulsion force components at 19 local positions and stride length, production of propulsion force beneath toe area can efficiently acquire sufficient stride length to keep running speed.

  98. Effect of turning angle on falls caused by induced slips during turning Peer-reviewed

    Takeshi Yamaguchi, Masaru Yano, Hiroshi Onodera, Kazuo Hokkirigawa

    JOURNAL OF BIOMECHANICS　45　(15)　2624-2629　2012/10

    DOI： 10.1016/j.jbiomech.2012.08.006 　

    ISSN： 0021-9290

  99. Preliminary study on wide base-of-support footwear in preventing falls caused by lateral slip during walking Peer-reviewed

    Takeshi Yamaguchi, Masaru Yano, Shinya Fukuzawa, Hiroshi Onodera, Kazuo Hokkirigawa

    Tribology Online　7　(3)　159-164　2012/09/30

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.7.159 　

    ISSN： 1881-2198

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    The present preliminary study examined whether an increase in the lateral width of footwear (base-of-support width) can reduce the risk of falling caused by induced lateral slip while turning on slippery surfaces. Wide base-of-support (BOS) footwear was designed and manufactured, with lateral widening achieved by fixing a BOS extension, using a planar linkage of 70-mm width on the lateral side of normal BOS footwear. Gait trials were conducted on 16 young healthy male adults. Subjects were instructed to walk in a straight line and to turn 60° to the right on a stainless steel floor covered with glycerol solution. As compared with the normal BOS footwear, the wide BOS footwear reduced the frequency of trials in which fall occurred due to lateral slip by up to 67% and the slip distance and slip velocity of the supporting foot were reduced by up to 40% and 35%, respectively. The results demonstrated the efficacy of increased lateral BOS width in reducing the risk of fall caused by induced lateral slip.

  100. Development of Railway Power Collecting Materials by Using Rice Bran Ceramics as Wear-Resistant Particles Peer-reviewed

    K. Shibata, T. Yamaguchi, J. Mishima, K. Hokkirigawa

    International Union of Materials Research Societies – International Conference on Electronic Materials 2012　2012/09

  101. Experimental study on microscopic wear mechanism of copper/carbon/rice bran ceramics composites Peer-reviewed

    Kei Shibata, Takeshi Yamaguchi, Tatsuhiro Urabe, Kazuo Hokkirigawa

    WEAR　294　270-276　2012/07

    DOI： 10.1016/j.wear.2012.07.004 　

    ISSN： 0043-1648

  102. Improvement of Tribological Properties of Thermoplastic Resin by Using Rice Bran Ceramics Particulate as Wear-Resistant Fillers Peer-reviewed

    K. Shibata, T. Yamaguchi, K. Hokkirigawa

    Final Papers of 15th Nordic Symposium on Tribology　2012/06

  103. Development of high grip footwear outsole using hybrid rubber pattern Peer-reviewed

    Takeshi Yamaguchi, Kenichi Kasuga, Takayuki Ito, Satoru Ishizawa, Kazuo Hokkirigawa

    Proceedings of NORDTRIB2012　61　USB memory (6 pages)　2012/06

  104. Friction and wear of PA66 composites filled with RB ceramics particles under dry conditions Peer-reviewed

    Kei Shibata, Takeshi Yamaguchi, Tatsuhiro Urabe, Kazuo Hokkirigawa

    Proceedings of NORDTRIB2012　USB memory (6 pages)　2012/06

  105. High grip footwear outsole using hybrid rubber surface pattern to prevent slip and fall

    Takeshi Yamaguchi, Kenichi Kasuga, Takayuki Ito, Satoru Ishizawa, Kazuo Hokkirigawa

    Abstracts of ISPGR/GAIT & MENTAL FUNCTION 1st Joint World Congress　485-486　2012/06

  106. Wide base‐of‐support footwear to increase lateral stability of older adults

    Takeshi Yamaguchi, Stephanie Middleton, Kenneth Cheng, Sandra McKay, Adrian Liggins, Brian Maki

    Abstracts of ISPGR/GAIT & MENTAL FUNCTION 1st Joint World Congress　484　484-485　2012/06

  107. Development of new footwear sole surface pattern for prevention of slip-related falls Peer-reviewed

    Takeshi Yamaguchi, Tomoki Umetsu, Yusuke Ishizuka, Kenichi Kasuga, Takayuki Ito, Satoru Ishizawa, Kazuo Hokkirigawa

    SAFETY SCIENCE　50　(4)　986-994　2012/04

    DOI： 10.1016/j.ssci.2011.12.017 　

    ISSN： 0925-7535

  108. Sliding velocity dependency of the friction coefficient of Si-containing diamond-like carbon film under oil lubricated condition Peer-reviewed

    Takeshi Yamaguchi, Junji Ando, Takuya Tsuda, Naoko Takahashi, Mamoru Tohyama, Atsushi Murase, Toshihide Ohmori, Kazuo Hokkirigawa

    TRIBOLOGY INTERNATIONAL　44　(11)　1296-1303　2011/10

    DOI： 10.1016/j.triboint.2010.07.003 　

    ISSN： 0301-679X

    eISSN： 1879-2464

  109. Experimental analysis of the distribution of traction coefficient between shoe sole and ground surface in running

    Kenta Moriyasu, Takeshi Nishiwaki, Takeshi Yamaguchi, Kazuo Hokkirigawa

    ITC Hiroshima 2011, EXTENDED ABSTRACT　USB memory　2011/10

  110. Analysis of microscopic wear mechanism of copper/carbon/rice bran ceramics composites

    Kei Shibata, Takeshi Yamaguchi, Tatsuhiro Urabe, Ryota Ifuku, Kazuo Hokkirigawa

    ITC Hiroshima 2011, EXTENDED ABSTRACT　USB memory　2011/10

  111. Development of novel rubber surface pattern to increase static and kinetic friction coefficients on wet surfaces

    Kazuo Hokkirigawa, Takeshi Yamaguchi, Yusuke Ishizuka, Katsufumi Inazawa, Kenichi Kasuga, Takayuki Ito, Satoru Ishizawa

    ITC Hiroshima 2011, EXTENDED ABSTRACT　USB memory　2011/10

  112. Tribological and kinematic analysis of gait during transient walking

    Takeshi Yamaguchi, Masaru Yano, Kazumasa Nagamori, Hiroshi Onodera, Kazuo Hokkirigawa

    ITC Hiroshima 2011, EXTENDED ABSTRACT　USB memory　2011/10

  113. Development of wide base-of-support footwear to prevent falls due to induced slips

    Takeshi Yamaguchi, Masaru Yano, Kazumasa Nagamori, Shinya Fukuzawa, Hiroshi Onodera, Kazuo Hokkirgawa

    ITC Hiroshima 2011, EXTENDED ABSTRACT　USB memory　2011/10

  114. Effect of treatment containing water-soluble keratin on friction of human hairs

    Kazuo Hokkirigawa, Takeshi Yamaguchi, Tatsuya Tsuda, Tetsuro Matsumoto, Keietsu Abe, Toru Takahashi

    ITC Hiroshima 2011, EXTENDED ABSTRACT　USB memory　2011/10

  115. Effect of surface texture on contact stiffness of shim spacer

    Kazuo Hokkirigawa, Takeshi Yamaguchi, Jun Enta, Koichi Matsumoto

    ITC Hiroshima 2011, EXTENDED ABSTRACT　USB memory　2011/10

  116. Low friction mechanism of hard porous carbon/silica composites made from rice husk

    Takeshi Yamaguchi, Yuta Tanaka, Kazuo Hokkirigawa

    ITC Hiroshima 2011, EXTENDED ABSTRACT　USB memory　2011/10

  117. Friction and wear properties of PEEK composites filled with RB ceramics particles

    Takeshi Yamaguchi, Sohei Nishio, Wataru Haryu, Kazuo Hokkirigawa

    ITC Hiroshima 2011, EXTENDED ABSTRACT　USB memory　2011/10

  118. Experimental analysis of traction coefficient of shoe/floor contact during walking

    T. Yamaguchi, M. Yano, H. Onodera, K. Hokkirigawa

    Conference abstracts of International Conference on BioTribology　CD-ROM　2011/09/18

  119. Friction and Wear Properties of Copper/Carbon/Rice Bran Ceramics Composite under Water-Lubricated Condition Peer-reviewed

    Kei Shibata, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Tribology Online　6　(2)　180-184　2011/01/31

    DOI： 10.2474/trol.6.180 　

  120. Friction and Wear Properties of Sintered Cu Alloy Impregnated with Thermo-Reversible Gel-Lubricant Peer-reviewed

    Naoki Yamano, Takeshi Yamaguchi, Yuji Shitara, Kazuo Hokkirigawa

    Tribology Online　5　(2)　118-122　2010/06

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.5.87 　

    ISSN： 1881-2198

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    The friction and wear properties of a sintered porous Cu alloy impregnated with either Thermo-Reversible Gel-Lubricant (TR Gel-Lube) or base fluid (PAO) were investigated. Friction tests were conducted under a wide range of normal loads (0.98 N, 9.8 N, and 19.6 N) and sliding velocities (0.2 m/s, 0.5 m/s, 1.0 m/s, and 2.1 m/s), using a high-carbon chromium steel (JIS-SUJ2) bearing ball with 8 mm diameter as a ball specimen. The friction coefficients of the sintered Cu alloy impregnated with TR Gel-Lube were lower than those of the alloy impregnated with the base fluid under a wide range of normal loads and sliding velocities. Particularly, the friction coefficient of the sintered Cu alloy impregnated with TR Gel-Lube had extremely low value - less than 0.05 at high normal load and high sliding velocity. The specific wear rates of the sintered Cu alloy impregnated with base fluid and that impregnated with TR Gel-Lube had low values - less than 10-8 mm2/N under a wide range of normal loads and sliding velocities. There was no significant difference in wear rates between the two impregnants.

  121. Friction and Wear of Polyamide 66 Composites Filled with RB Ceramics Particles under Dry Condition Peer-reviewed

    Motoharu Akiyama, Takeshi Yamaguchi, Kunihiro Matsumoto, Kazuo Hokkirigawa

    Tribology Online　5　(2)　87-91　2010/04

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.5.87 　

    ISSN： 1881-2198

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    This study investigated the effect of a particle diameter and a weight fraction of RB ceramics particles on friction and wear of polyamide 66 composites filled with RB ceramics particles (PA66/RB ceramics composites) sliding against a bearing steel ball under dry condition. RB ceramics particles with a mean diameter of 3, 30, and 150 μm were used as the filler. Weight fractions of RB ceramics particles were 10, 30, and 50 mass% for the mean diameter of the particles of 3 μm, and 30, 50, and 70 mass% for the mean diameters of 30 and 150 μm. The smaller mean diameter and the higher weight fraction of RB ceramics particles provided lower friction coefficients and lower specific wear rates with the PA66/RB ceramics composites. The composite with a mean diameter and a weight fraction of RB ceramics particles of 30 μm and 70 mass% took the lowest friction coefficient of 0.27 among the composites. The composite with a mean diameter and a weight fraction of RB ceramics particles of 3 μm and 50 mass% took the lowest specific wear rate of 1.3 × 10-9mm2/N among the composites, which was equivalent to the specific wear rate of RB ceramics disk.

  122. Polymer composites filled with RB ceramics particles as low friction and high wear resistant filler Peer-reviewed

    Motoharu Akiyama, Takeshi Yamaguchi, Kunihiro Matsumoto, Kazuo Hokkirigawa

    Tribology online　5　(1)　19-26　2010/01/15

    DOI： 10.2474/trol.5.19 　

  123. Friction and wear properties of rice husk ceramics under dry condition Peer-reviewed

    Tuvshin Dugarjav, Takeshi Yamaguchi, Kei Shibata, Kazuo Hokkirigawa

    JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY　24　(1)　85-88　2010/01

    DOI： 10.1007/s12206-009-1167-9 　

    ISSN： 1738-494X

  124. New technique of three directional ground reaction force distributions Peer-reviewed

    Kenta Moriyasu, Tsuyoshi Nishiwaki, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Footwear Science　2　(2)　57-64　2010/01

    DOI： 10.1080/19424281003685710 　

    ISSN： 1942-4280 1942-4299

  125. Analysis of the slip-related falls and fall prevention with an intelligent shoe system Peer-reviewed

    Hiroshi Onodera, Takeshi Yamaguchi, Hiroteru Yamanouchi, Kazumasa Nagamori, Masaru Yano, Yasuhisa Hirata, Kazuo Hokkirigawa

    2010 3RD IEEE RAS AND EMBS INTERNATIONAL CONFERENCE ON BIOMEDICAL ROBOTICS AND BIOMECHATRONICS　616-620　2010

    DOI： 10.1109/BIOROB.2010.5628030 　

    ISSN： 2155-1782

  126. Friction and wear properties of copper/carbon/RB ceramics composite under electrical current Peer-reviewed

    Kei Shibata, Takeshi Yamaguchi, Yuta Yao, Nobuyuki Yokoyama, Junichiro Mishima, Kazuo Hokkirigawa

    Tribology online　4　(5)　131-134　2009/11/30

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.4.131 　

    ISSN： 1881-2198

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    Friction and wear properties of the copper/carbon/RB ceramics (Cu/C/RBC) composite were investigated under electrical current with and without arc-discharge. The weight fraction and the mean diameter of RB ceramics powder were 5 wt% and 4.9 μm, respectively, in the Cu/C/RBC composite. Friction tests were conducted with the block-on-ring friction apparatus. The Cu/C/RBC and the copper/carbon (Cu/C) composite, the conventional pantograph slider material of a railway current collector, were used as block specimens. Under electrical current without arc-discharge, the Cu/C/RBC composite showed 98% reduction in the specific wear rate of the block specimen, 23% reduction in that of the ring specimen, and 75% reduction in the friction coefficient over the conventional Cu/C composite. Under electrical current with arc-discharge, the Cu/C/RBC composite showed the wear resistance to arc-discharge equivalent to the conventional Cu/C composite.

  127. Experimental Analysis of Slip Potential in Normal-style Walking and Nanba-style Walking Peer-reviewed

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    Journal of Biomechanical Science and Engineering　4　(3)　468-479　2009/11/04

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jbse.4.468 　

    ISSN： 1880-9863

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    The maximum peak value of traction coefficient between a shoe sole and a floor at heel-strike period |Fh/Fn|h and that at toe-off period |Fh/Fn|t for normal-style and Nanba-style walking were investigated in this paper. The Nanba-style walking is known as Japanese traditional walking style. The characteristics of the Nanba-style walking different from the normal-style walking are knee flexion, anteversion of the upper body and small swing of the arms. Gait experiments were carried out on a dry level walkway. Four healthy male adults participated in the gait experiments, and they were asked to walk in the normal-style and the Nanba-style walking under a wide range of step length and walking speed. Ground reaction forces and full body kinematics were captured. The results indicated that |Fh/Fn|h of the Nanba-style walking was significantly (p<0.05) smaller than that of the normal-style walking under a wide range of walking conditions. Kinematic analysis of the Nanba-style walking indicated that reduction in friction requirement for such walking style would be due to anteriorly displacing the whole body COM as compared with that of the normal-style walking, resulting in decrease of the distance between the whole body COM and the COP in horizontal-plane. While a statistically significant difference of |Fh/Fn|t between these two walking styles were not observed, mean |Fh/Fn|t of the Nanba-style walking was smaller than that of the normal-style walking under a wide range of walking conditions.

  128. Tribological and kinematic analysis of walking-style for reducing the peak traction coefficient between shoe sole and floor Invited

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    Proceedings of the world tribology congress Ⅳ　507　2009/09/06

  129. Tribological behavior of hard porous carbon materials Rice Husk ceramics

    Dugarjav Tuvshin, Takeshi Yamaguchi, Kiminori Furukawa, Shohei Katakura, Kazuo Hokkirigawa

    Proceedings of the world tribology congress Ⅳ　174　2009/09/06

  130. Tribological properties of newly developed Cu/C/RBC composites as pantograph slider material of railway current collector

    Kei Shibata, Takeshi Yamaguchi, Yuta Yao, Akihiko Ishizu, Nobuyuki Yokoyama, Junichiro Mishima, Kazuo Hokkirigawa

    Proceedings of the world tribology congress Ⅳ　162　2009/09/06

  131. Tribological properties of newly developed resin/RB ceramics composites

    Motoharu Akiyama, Kunihiro Matsumoto, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Proceedings of the world tribology congress Ⅳ　171　2009/09/06

  132. Tribological properties of DLC-Si film under oil lubricated condition

    Junji Ando, Takeshi Yamaguchi, Taro Endo, Naoko Takahashi, Mamoru Tohyama, Atushi Murase, Toshihide Ohmori, Kazuo Hokkirigawa

    Proceedings of the world tribology congress Ⅳ　438　2009/09/06

  133. Development of Anti-skid Shoe Sole on Lubricated Smooth Surface by Use of Hybrid Tread Pattern Peer-reviewed

    Takeshi Yamaguchi, Tomoki Umetsu, Yusuke Ishizuka, Kenichi Kasuga, Takayuki Ito, Satoru Ishizawa, Kazuo Hokkirigawa

    Proceedings of the 17th World Congress on Ergonomics (IEA2009)　CD-ROM-(9 pages)　2009/08

  134. Experimental Analysis of Relationship between Target Zero Moment Point and Base of Support for Evaluation of the Potential of Slip-related Falls Peer-reviewed

    Takeshi Yamaguchi, Shintaro Hatanaka, Hiroteru Yamanouchi, Hiroshi Onodera, Kazuo Hokkirigawa

    Proceedings of the 17th World Congress on Ergonomics (IEA2009)　CD-ROM-(7 pages)　2009/08

  135. Friction and wear properties of rice husk ceramics under dry and water lubricated conditions Peer-reviewed

    Tuvshin Dugarjav, Takeshi Yamaguchi, Kei Shibata, Kazuo Hokkirigawa

    Tribology online　4　(4)　78-81　2009/07/15

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.4.78 　

    ISSN： 1881-2198

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    The authors have developed the new hard porous carbon material "Rice Husk ceramics" (RH ceramics) by carbonizing the mixture of rice husk and phenol resin at 900 °C in inert gas environment. The RH ceramics are composed of amorphous carbon and amorphous silica, about 90 and 10 wt.%, respectively. The friction and wear properties of RH ceramics sliding against austenitic stainless steel (JIS SUS304) were evaluated under dry and water lubricated conditions using a ball-on-disk apparatus. The test results showed that RH ceramics have lower friction coefficients and specific wear rates under dry than under water lubricated condition. The friction coefficient took very low values of 0.06 to 0.11 under dry condition, whereas, it was 0.09 to 0.15 under water lubricated condition. The specific wear rate was less than 10-8 mm2/N under both conditions, though it was much lower under dry than under water lubricated condition. Transmission electron microscopy with energy dispersive X-ray spectroscopy and electron diffraction analyses were employed to characterize the properties of the worn surfaces of SUS304 ball samples. It was found that the tribological behavior of RH ceramics is strongly governed by the characteristics of the transferred film formed on counterpart surfaces.

  136. Walking Mode Maps for Prevention of Slip-related Falls

    Takeshi Yamaguchi, Shintaro Hatanaka, Hiroteru Yamanouchi, Hiroshi Onodera, Kazuo Hokkirigawa

    Proceedings of the 3rd International Conference on Manufacturing, Machine Design and Tribology (ICMDT2009)　30　2009/06

  137. Friction and Wear Properties of Cu/C/RBC Composite as Pantograph Slider Material of Railway Current Collector

    Kei Shibata, Takeshi Yamaguchi, Yuta Yao, Akihiko Ishizu, Nobuyuki Yokoyama, Junichiro Mishima, Kazuo Hokkirigawa

    Proceedings of the 3rd International Conference on Manufacturing, Machine Design and Tribology(ICMDT2009)　69　2009/06

  138. The Effect of Counterpart Matrerials on Friction and Wear of Rice Husk Ceramics under Dry Condition

    Tuvshin Dugarjav, Takeshi Yamaguchi, Kazuo Hokkriigawa

    Proceedings of the 3rd International Conference on Manufacturing, Machine Design and Tribology(ICMDT2009)　67　2009/06

  139. S1105-1-1 Improvement of friction characteristics on the surface of spheroidal graphite cast iron by cavitation peening

    SOYAMA Hitoshi, SHINNOKI Takahiro, YAMAGUCHI Takeshi, HOKKIRIGAWA Kazuo

    The proceedings of the JSME annual meeting　2009　165-166　2009

    Publisher: The Japan Society of Mechanical Engineers

    DOI： 10.1299/jsmemecjo.2009.4.0_165 　

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    Although cavitation normally causes severe damage in hydraulic machinery, cavitation impact can be utilized for surface treatment in the same way as shot peening. The peening method using cavitation impact is named as cavitation peening. Plastic deformation pits induced by peening changes friction characteristics on metallic surface. When friction coefficient μ decreases with slipping velocity v, stick-slip occurs. In order to reduce negative slope of μ-v curve to eliminate stick-slip, friction characteristics of peened surface was evaluated. Tested material was quenched spheroidal graphite cast iron which was used as guides for working machines. The friction coefficient was measured by using two types of ball on plate machine. It was revealed that the negative slope of μ-v curve on the surface was improved by plastic deformation pits induced by cavitation peening and shot peening.

  140. Tribological properties of Si-containing diamond-like carbon film under ATF lubricated condition Peer-reviewed

    J. Ando, T. Ohmori, A. Murase, N. Takahashi, T. Yamaguchi, K. Hokkirigawa

    WEAR　266　(1-2)　239-247　2009/01

    DOI： 10.1016/j.wear.2008.06.022 　

    ISSN： 0043-1648

  141. The Effect of Carbonizing Temperature on Friction and Wear Properties of Hard Porous Carbon Materials Made from Rice Husk Peer-reviewed

    Tuvshin Dugarjav, Takeshi Yamaguchi, Shohei Katakura, Kazuo Hokkirigawa

    Tribology online　4　(1)　11-16　2009/01

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.4.11 　

    ISSN： 1881-2198

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    The new hard porous carbon material called the RH (rice husk) ceramics has been developed by carbonizing rice husk as the main raw material. In order to clarify the friction and wear properties of RH ceramics, a study of the effect of carbonization temperature on the mechanical and tribological properties of RH ceramics was undertaken. RH ceramics samples carbonized at 900, 1400, and 1500 °C were prepared for this study. The RH ceramics samples were inspected using X-ray diffraction, EDX and scanning electron microscopy. Mechanical properties of RH ceramics such as Vickers hardness, compressive strength, and bulk density were also studied. The RH ceramics carbonized at 1500 °C had much higher porosity compared to the ones carbonized at lower temperatures. In addition, the bulk density and compressive strength decreased with increasing carbonization temperature. Whereas, the hardness was higher for the RH ceramics carbonized at higher temperatures. Ball-on-disk sliding tests showed that the RH ceramics carbonized at the conventional 900 °C have better friction and wear properties compared to the ones carbonized at 1400 and 1500 °C under dry condition sliding against austenitic stainless steel (JIS SUS304). The friction coefficient and specific wear rate took very low values of 0.07 and less and 5.0×10-10mm2/N and less, correspondingly, for the RH ceramics carbonized at 900 °C. Based on the experimental results, friction and wear mechanisms have been summarized for each carbonization temperature.

  142. Friction and Wear Properties of New Hard Porous Carbon Material “Rice Husk Ceramics”

    D. Tuvshin, T.Yamaguchi, K. Hokkirigawa

    Extended Abstracts of 2nd International Conference on Advanced Tribology 2008 (iCAT 2008)　570-572　2008/12/03

  143. Development of high wear resistance composites for pantograph sliders of railway current collector

    K. Shibata, Y. Yao, T. Yamaguchi, J. Mishima, K. Hokkirigawa

    Extended Abstracts of 2nd International Conference on Advanced Tribology 2008 (iCAT 2008)　366-368　2008/12/03

  144. Proposal and Application of Walking Mode Maps

    T. Yamaguchi, K.Hokkirigawa

    Extended Abstracts of 2nd International Conference on Advanced Tribology 2008 (iCAT 2008)　515-517　2008/12/03

  145. The Effect of Load Carrying on the Traction Coefficient Between Shoe Sole and Floor During Walking

    T. Yamaguchi, H. Yamanouchi, K. Hokkirigawa

    Extended Abstracts of 2nd International Conference on Advanced Tribology 2008 (iCAT 2008)　280-282　2008/12/03

  146. Experimental Analyses of Load Carrying Effects on the Peak Traction Coefficient between Shoe Sole and Floor during Walking Peer-reviewed

    Takeshi Yamaguchi, Hiroteru Yamanouchi, Kazuo Hokkirigawa

    Tribology online　3　(6)　342-347　2008/11/30

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.3.342 　

    ISSN： 1881-2198

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    This paper presents the effect of load carrying (position and weight of load) on the maximum peak values of traction coefficient between shoe sole and floor during walking on level walkway. Gait experiments were conducted by five healthy male adult participants walking on the force plates with carrying the loads. Each subject was tested at step length of 0.75 m and at walking speed of 1.4 m/s. They were instructed to carry the loads by three different ways; a 2-handed load carrying, a back-pack load carrying, and a waist level front load carrying. Weight of load was 49, 98, 147 or 196 N for each way of load carrying. For a waist level front load carrying, the maximum peak traction coefficient at heel strike period |Fh/Fn|h statistically significantly (p < 0.01) decreased with increasing of weight of load. On the other hand for other ways of load carrying, |Fh/Fn|h was not affected significantly (p > 0.05) by weight of load. For each way of load carrying, the maximum peak value of traction coefficient at toe-off period |Fh/Fn|t had tendency to increase with increase of weight of load. The relationship between the slip potential and the COM position change by load carrying were also discussed.

  147. Friction and wear properties of copper/carbon/RB ceramics composite materials under dry condition Peer-reviewed

    Kei Shibata, Takeshi Yamaguchi, Junichiro Mishima, Kazuo Hokkirigawa

    Tribology online　3　(4)　222-227　2008/07

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.3.222 　

    ISSN： 1881-2198

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    In order to realize reducing wear of both overhead wires and pantograph sliders, the authors have developed new composite materials for pantograph sliders by using hard porous carbon materials "RB ceramics". The new composite materials were developed by sintering compounds of copper, carbon and the RB ceramics particles. Friction and wear properties of these copper/carbon/RB ceramics composite materials (Cu/C/RBC composites) sliding against a copper alloy pin under dry condition were investigated. The friction coefficient for the Cu/C/RBC composites was lower and more stable than that for the conventional pantograph slider material, Cu/C composite. The friction coefficient for the Cu/C/RBC composites was about 1/2 ∼ 3/5 of that for the Cu/C composite. The specific wear rate of the Cu/C/RBC composites was extremely lower than that of the Cu/C composite. The specific wear rate of the Cu/C/RBC composites was decreased with a decrease of the weight fraction and the mean particle size of the RB ceramics particles. The specific wear rate of the Cu/C/RBC composites was about 1/220 ∼ 1/70 of that of the conventional Cu/C composite. Furthermore, the specific wear rate of a copper alloy pin sliding against the Cu/C/RBC composites is about 1/1700 ∼ 1/150 of that sliding against the conventional Cu/C composite.

  148. Effect of step length and walking speed on traction coefficient and slip between shoe sole and walkway Invited Peer-reviewed

    Takeshi Yamaguchi, Shintaro Hatanaka, Kauzo Hokkirigawa

    Tribology online　3　(2)　59-64　2008/04

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.3.59 　

    ISSN： 1881-2198

    More details Close

    The effect of gait parameters such as step length and walking speed on the traction coefficient and the slip between a shoe sole and a walkway was clarified experimentally, and desirable gait to reduce the chance of slipping was also suggested. The maximum peak value of traction coefficient obtained at heel-strike period |Fh/Fn|h and that at toe-off period |Fh/Fn|t increased with an increase of step length irrespective of subjects when walking on dry walkway. Meanwhile, |Fh/Fn|h or |Fh/Fn|t slightly decreased or took almost constant value with respect to walking speed. Based on the results of gait experiments on glycerin-lubricated walkway, it was clarified that a walk with a shorter step length and a higher walking speed was effective for prevention of slip irrespective of subjects, and such a gait provided a shorter slip distance. The reason why the smaller maximum peak values of traction coefficient can be obtained in case of walking with a shorter step length and a higher walking speed was discussed based on the kinematic analysis using the body center of mass (COM) and center of pressure of shoe sole (COP).

  149. Development of hard porous carbon materials RB ceramics and their practical applications

    Kazuo Hokkirigawa, Takeshi Yamaguchi

    Proceedings of the 5th Interantional Symposium on Mechanical Science based on Nanotechnology　109-114　2008/03/06

  150. Evaluation of DLC-Si film damage due to friction under ATF lubricated condition Peer-reviewed

    Junji Ando, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Tribology online　3　(1)　1-5　2008/01

    Publisher: Japanese Society of Tribologists

    DOI： 10.2474/trol.3.1 　

    ISSN： 1881-2198

    More details Close

    Diamond-like carbon (DLC) coating technology has been receiving increasing attention in recent years for its application to automotive sliding parts. As it is critical to evaluate the adhesion strength between a film and a substrate for assessment of the reliability of DLC films, a practical method to assess film damage under repeated sliding motions is needed. This research clarified the conditions under which damage is generated on Si-containing DLC films by analyzing damage modes such as wear, spalling, and cracking of the films under an automatic transmission fluid (ATF) lubrication condition and repeated sliding friction. The research also confirmed the effectiveness of the evaluation method. The test results indicated that the Si-containing DLC film has the highest reliability compared to the other types of films tested using the same test method.

  151. KINEMATIC AND TRIBOLOGICAL ANALYSIS OF SLIP PHENOMENA DURING WALKING Peer-reviewed

    Takeshi Yamaguchi, Shintaro Hatanaka, Kazuo Hokkirigawa

    CONTEMPORARY ERGONOMICS 2008　644-650　2008

  152. 'Walking-Mode Maps' based on Slip/Non-Slip criteria Peer-reviewed

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    Industrial Health　46　(1)　23-31　2008/01

    DOI： 10.2486/indhealth.46.23 　

    ISSN： 0019-8366

  153. Development and applications of hard porous carbon materials “RB ceramics” made from Rice Bran Invited Peer-reviewed

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    Proceedings of Malaysia-Japan International Symposium on Advanced Technology 2007 (MJISAT 2007)　CD-ROM　2007/11

  154. Study on the effective walking style for prevention of slip Peer-reviewed

    Takeshi Yamaguchi, Shintaro Hatanaka, Kenichi Abe, Yasushi Ota, Kazuo Hokkirigawa

    Proceedings of the International Conference on Slips, Trips, and Falls 2007: From Research to Practice　61-65　2007/08

  155. Development of high grip shoe soles by using rubber/RB ceramics composites Peer-reviewed

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    Proceedings of the International Conference on Slips, Trips, and Falls 2007: From Research to Practice　163-167　2007/08

  156. Proposal of a walking mode map based on slip/non-slip criterion

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    Journal of Biomechanics　40　(S2)　110　2007/07

  157. Development of phenol resin/RB ceramics composites for sliding bearing in water

    T. Yamaguchi, H. Matsuura, K. Hokkirigawa

    Proceedings of 4th International Symposium on Mechanical Science Based on Nanotechnology　117-121　2007/02

  158. Tribological properties and applications of hard porous carbon materials "RB ceramics" Peer-reviewed

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS　52　(2)　114-119　2007

    ISSN： 0915-1168

  159. Experimental analysis of critical friction condition between shoe sole and floor for safety walking Peer-reviewed

    T. Yamaguchi, Y. Suzuki, K. Abe, R. Aiuchi, Y. Ota, N. Miyata, K. Hokkirigawa

    Proceedings of the Third Asia International Conference on Tribology　65-66　2006/10

  160. Development of high friction shoe soles using rubber/RB ceramics composites Peer-reviewed

    K. Hokkirigawa, T. Yamaguchi, Y. Suzuki, K. Abe, R. Aiuchi

    Proceedings of the Third Asia International Conference on Tribology　67-68　2006/10

  161. Evaluation of slip resistance between shoe soles and floor materials by using portable static friction tester Peer-reviewed

    T. yamaguchi, K. Abe, Y. Suzuki, R. Aiuchi, T. Nomura, S. Nomura, Y. Ota, N. Miyata, K. Hokkirigawa

    Proceedings of the Third Asia International Conference on Tribology　109-110　2006/10

  162. Friction and wear properties of SiC/RB ceramics composites Peer-reviewed

    T. Yamaguchi, Y. Zhou, K. Hirao, Y. Kino, H. Matsuura, K. Hokkirigawa

    Proceedings of the Third Asia International Conference on Tribology　377-378　2006/10

  163. Friction and wear properties of new hard porous carbon materials made from rice chaff Peer-reviewed

    T. Yamaguchi, T. Sekiguchi, H. Toyoshima, E. Kohira, S. Shikano, K. Hokkirigawa

    Proceedings of the Third Asia International Conference on Tribology　379-380　2006/10

  164. Development and tribological properties of diamond films by spraying fine diamond particles on bronze, alumina and polyamide 66 substrates Peer-reviewed

    T. Yamaguchi, K. Miyazawa, K. Shibata, K. Takahashi, K. Hokkirigawa

    Proceedings of the Third Asia International Conference on Tribology　381-382　2006/10

  165. Tribological properties of PA66/RB ceramics composites under dry and oil lubricated conditions Peer-reviewed

    M. Akiyama, K. Matsumoto, T. Yamaguchi, K. Hokkirigawa

    Proceedings of the Third Asia International Conference on Tribology　383-384　2006/10

  166. The effect of temperature and relative humidity on friction and wear properties of RB ceramics Peer-reviewed

    T. Yamaguchi, F. Sato, N. Muroi, K. Hokkirigawa

    Proceedings of the Third Asia International Conference on Tribology　385-386　2006/10

  167. Development of hard porous carbon materials RB ceramics and their tribological applications Peer-reviewed

    T. Yamaguchi, K. Hokkirigawa

    Proceedings of the Third Asia International Conference on Tribology　387　387-388　2006/10

  168. Friction properties of DLC-Si film under ATF lubricated condition Peer-reviewed

    J. Ando, T. Yamaguchi, N. Funabashi, K. Hokkirigawa

    Proceedings of the Third Asia International Conference on Tribology　389-390　2006/10

  169. Tribological properties of AWD coupling with DLC-Si coated electromagnetic clutch, Peer-reviewed

    J. Ando, T. Saito, N. Sakai, T. Sakai, H. Fukami, K. Nakanishi, H. Mori, H. Tachikawa, T. Ohmori, N. Funabashi, T. Yamaguchi, K. Hokkirigawa

    Proceedings of the Third Asia International Conference on Tribology　2　759-760　2006/10

  170. Preparation and tribological properties of SiC/rice bran carbon composite ceramics Peer-reviewed

    Y Zhou, K Hirao, T Yamaguchi, K Hokkirigawa

    JOURNAL OF MATERIALS RESEARCH　20　(12)　3439-3448　2005/12

    DOI： 10.1557/JMR.2005.0427 　

    ISSN： 0884-2914

  171. Development of PA66/RB ceramics composites as new tribomaterials

    T. Yamaguchi, M. Akiyama, K. Matsumoto, K. Hokkirigawa

    Proceedings of 3rd International Symposium on Mechanical Science Based on Nanotechnology　189-191　2005/11

  172. The effect of temperature on friction and wear properties of RB ceramics

    T. Yamaguchi, F. Sato, K. Hokkirigawa

    Book of Synopses of International Tribology Conference Kobe 2005　380　2005/05

  173. Friction and wear properties of RB ceramics under oil lubricated condition

    T. Yamaguchi, G. Kimura, K. Hokkirigawa

    Book of Synopses of International Tribology Conference Kobe 2005　278　2005/05

  174. Development of thermoplastic resin/RB ceramics composites and their friction and wear properties under dry and oil lubricated conditions

    M. Akiyama, K. Matsumoto, T. Yamaguchi, K. Hokkirigawa

    Book of Synopses of International Tribology Conference Kobe 2005　381　2005/05

  175. Friction and wear properties of PA66/RB ceramics composite under dry and oil lubricated conditions

    M. Akiyama, K. Matsumoto, T. Yamaguchi, K. Hokkirigawa

    Book of Synopses of International Tribology Conference Kobe 2005　279　2005/05

  176. Development of rubber/RB ceramics composites as high-grip shoe sole materials

    T. Yamaguchi, K. Naradate, K. Hokkirigawa

    Book of Synopses of International Tribology Conference Kobe 2005　382　2005/05

  177. Development of Polymer Composites Mixed with New Porous Carbon Particles -Fundamental Properties and Applications

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    Proceedings of the 1st International Symposium on Mechanical Science Based on Nanotechnology　99-106　2004/02

  178. Wear mode control of drive tip of ultrasonic motor for precision positioning Peer-reviewed

    T Yamaguchi, K Adachi, Y Ishimine, K Kato

    WEAR　256　(1-2)　145-152　2004/01

    DOI： 10.1016/S0043-1648(03)00371-5 　

    ISSN： 0043-1648

  179. Development and Application of Hard Porous Carbon Materials “RB Ceramics”

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    Proceedings of the Second Japan-Taiwan Workshop on Mechanical and Aerospace Engineering　175-184　2003/10

  180. Tribologically-based design of precise positioning stage Peer-reviewed

    K Adachi, T Yamaguchi, Y Ishimine, K Kato

    TRIBOLOGICAL RESEARCH AND DESIGN FOR ENGINEERING SYSTEMS　41　461-468　2003

  181. Wear Mode Control of Ultrasonic Motor for Precision Positioning

    T. Yamaguchi, K. Adachi, K. Kato

    Proceedings of the 23rd Meeting of International Research Group on Wear of Engineering(CD-ROM)　1　2002

Show all ︎Show first 5

Misc. 56

  1. すべり，つまずき，転倒・転落に関する国際会議（International Conference on Slips, Trips, and Falls Sendai 2022 (STF Sendai 2022)）

    山口健

    セイフティーダイジェスト　10　1-6　2022/10

  2. RBセラミックス粒子を配合した自転車用ブレーキシューの開発

    山口健, 柴田圭, 内田寿, 堀切川一男

    トライボロジスト　67　(3)　163-168　2022/03

  3. 東北大学サイエンスキャンパス ～産学連携による体験型科学教室～

    山口健

    自動車技術会関東支部報　77　2022/01

  4. Tribology of Resin Composites Filled with RB Ceramics

    Kei Shibata, Takeshi Yamaguchi, Kazuo Hokkirigawa

    Seikei-Kakou　32　(12)　408-412　2020/11/20

    Publisher: The Japan Society of Polymer Processing

    DOI： 10.4325/seikeikakou.32.408 　

    ISSN： 0915-4027

    eISSN： 1883-7417

  5. Tribology for Preventing Slips

    Takeshi YAMAGUCHI, Kei SHIBATA, Kazuo HOKKIRIGAWA

    Journal of the Japan Society for Precision Engineering　86　(8)　605-608　2020/08/05

    Publisher: Japan Society for Precision Engineering

    DOI： 10.2493/jjspe.86.605 　

    ISSN： 0912-0289

    eISSN： 1882-675X

  6. Effect of Rosin Powder on Friction between Finger Pad and Baseball Invited

    Takeshi Yamaguchi, Daiki Nasu

    Journal of Japanese Society of Tribologists　67　(7)　424-430　2020/07

    DOI： 10.18914/tribologist.65.07_424 　

  7. ITC Sendai 2019におけるシンポジウムセッションの見どころ

    山口健, 足立幸志

    月刊トライボロジー　2019年9月号　(No.385)　22-23　2019

  8. ITC Sendai 2019における見どころ・聴きどころ

    足立幸志, 山口健

    月刊トライボロジー　2019年9月号　(No.385)　17-19　2019

  9. Manufacturing education for freshman in Tohoku University Invited

    YAMAGUCHI Takeshi

    Journal of the Japan Society for Abrasive Technology　62　(11)　563-566　2018/11

  10. RBセラミックス粒子の充てんによる樹脂材料の低摩擦・低摩耗化

    山口健, 柴田圭, 堀切川一男

    プラスチックス　68　(9)　1-5　2017/09

    Publisher: 日本工業出版

    ISSN： 0555-7887

  11. Distribution of Local Required Coefficient of Friction in Shoe-Floor Contact Area during Walking by Use of Sensor Shoe

    52　(8)　488-491　2017/08

    Publisher: 日本設計工学会

    ISSN： 0919-2948

  12. 【フロントコラム】 ロジンバックはすべり止めか？

    山口健

    月刊トライボロジー　360　(8)　2017/08

    Publisher: 新樹社

  13. Effect of friction at chip-tool interface on chip geometry and chip snarling (vol 107, pg 60, 2016)

    Yasuyoshi Saito, Shoki Takiguchi, Takeshi Yamaguchi, Kei Shibata, Takeshi Kubo, Wataru Watanabe, Satoru Oyama, Kazuo Hokkirigawa

    INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE　117　42-42　2017/06

    DOI： 10.1016/j.ijmachtools.2017.02.004 　

    ISSN： 0890-6955

    eISSN： 1879-2170

  14. Turning on slippery floors: a new approach to assess dynamic postural stability based on misalignment of the desired and actual center of pressure

    Takeshi Yamaguchi

    International Society of Posture & Gait Research Blogs　2017/05/30

  15. 歩行安全性におけるトライボロジー

    山口 健

    トライボロジスト　62　(1)　2-9　2017/01/15

    Publisher: 新樹社

    DOI： 10.18914/tribologist.62.01_3 　

    ISSN： 0915-1168

  16. Friction and Wear Properties of Stainless Steel Fabricated by Powder Bed Fusion Process

    51　(8)　571-573　2016/08

    Publisher: 日本設計工学会

    ISSN： 0919-2948

  17. Study on the Evaluation of Tissue Paper Considering Its Frictional Property

    51　(8)　574-576　2016/08

    Publisher: 日本設計工学会

    ISSN： 0919-2948

  18. 建設作業員の転倒防止対策：すべりによる転倒防止に向けて

    山口健

    建設労務安全　(6)　2-9　2016/06

    Publisher: 労働調査会

  19. 移動型静・動摩擦係数測定システムを用いた床材料の耐滑性評価に関する研究

    山田亮, 山口健, 柴田圭, 大西明宏, 菅間敦, 日野下守, 坂内厚一, 堀切川一男

    日本トライボロジー学会トライボロジー会議予稿集(CD-ROM)　2016　2016

  20. Evaluation of Risk of Falls Caused by Induced Slips Using Desired Center of Pressure

    50　(8)　395-398　2015/08

    Publisher: 日本設計工学会

    ISSN： 0919-2948

  21. Development of Bicycle Brake Shoe with High Braking Performance

    50　(8)　399-402　2015/08

    Publisher: 日本設計工学会

    ISSN： 0919-2948

  22. 移動型靴／床静・動摩擦係数測定システムを用いた床材の耐滑性評価に関する研究

    柴田圭, 山口健, 阿部竣太, 堀切川一男

    設計工学　50　(8)　385-388　2015/08

    Publisher: 日本設計工学会

    ISSN： 0919-2948

  23. 15. 油で濡れた斜面や氷面でもすべりにくい超耐滑靴「復興足進」の開発 ～NHK超絶凄ワザ！での開発秘話～

    山口健

    第208回ゴム技術シンポジウム ゴムのトライボロジーの基礎から応用V　2015/01

  24. 閑話休題 NHK超絶凄ワザ！への出演 壮絶な挑戦で勝利を獲得

    山口健, 柴田圭, 堀切川一男

    月刊トライボロジー　(7)　50-50　2014/07

    Publisher: 新樹社

  25. 162 Development of High-Functional Tap for realizing Ultra High Speed Machining

    SAITO Yasuyoshi, YAMAGUCHI Takeshi, SHIBATA Kei, KADOTA Yuki, KUBO Takeshi, WATANABE Wataru, SAWABE Teruo, HOKKIRIGAWA Kazuo

    2014　(49)　121-122　2014

    Publisher: The Japan Society of Mechanical Engineers

  26. 156 Study on the mechanism of slip and fall prevention by BOS-widened footwear

    OKAWA Yukihiko, YAMAGUCHI Takeshi, HOKKIRIGAWA Kazuo

    2014　(49)　109-110　2014

    Publisher: The Japan Society of Mechanical Engineers

  27. 155 Friction and Wear Properties of Hard Porous Carbon Material RB ceramics Made from Rice Bran under Vacuum Condition

    ICHIHASHI Kohei, ISHIGAKI Wataru, SHIBATA Kei, YAMAGUCHI Takeshi, HOKKIRIGAWA Kazuo

    2014　(49)　107-108　2014

    Publisher: The Japan Society of Mechanical Engineers

  28. Friction and Wear Properties of PEEK Resin Filled with RB Ceramics Particles under Water Lubricated Condition

    YAMAGUCHI Takeshi, HOKKIRIGAWA Kazuo

    58　(7)　487-495　2013/07/15

    Publisher: 日本トライボロジー学会 ; 1989-

    ISSN： 0915-1168

  29. トライボロジー海外体験記 －アラウンド・ザ・ワールド －Centre for Studies in Aging, Sunnybrook Health Sciences Centre, University of Toronto にて－

    山口健

    トライボロジスト　58　(5)　341-345　2013/05

    Publisher: 日本トライボロジー学会 ; 1989-

    ISSN： 0915-1168

  30. Fluid Power Technology Apply on Torque Converter for Passenger Car

    YAMAGUCHI Takeshi

    44　(2)　75-77　2013/03/15

    Publisher: 日本フルードパワーシステム学会

    ISSN： 1346-7719

  31. 115 Friction and Wear Properties between Polyamide 66 Filled with RB Ceramics Particle and Stainless Steel

    IFUKU Ryota, SHIBATA Kei, YAMAGUCHI Takeshi, HOKKIRIGAWA Kazuo

    2012　(48)　34-35　2012/09/22

    Publisher: The Japan Society of Mechanical Engineers

  32. 209 Development of Base-of-Support Enlarged Footwear for Reduction of Risk of Slip-Related Falls

    YANO Masaru, YAMAGUCHI Takeshi, ONODERA Hiroshi, HOKKIRIGAWA Kazuo

    2012　(47)　224-225　2012/03/13

    Publisher: The Japan Society of Mechanical Engineers

  33. 粗面と平滑面の複合化による高摩擦ゴム表面パターンの開発と応用

    山口健

    日本機械学会誌　2　(1119)　104-104　2012/02

    Publisher: 一般社団法人日本機械学会

    ISSN： 0021-4728

  34. RBセラミックス粉体を用いた複合材料の開発と応用

    山口健

    機械学会誌　114　(1111)　472-472　2011/06

    Publisher: 一般社団法人日本機械学会

    ISSN： 0021-4728

  35. 202 Evaluation of effects of water soluble keratin extracted from feather on tactile sensation of human hairs based on friction test

    TSUDA Takuya, YAMAGUCHI Takeshi, ABE Keietsu, TAKAHASHI Toru, HOKKIRIGAWA Kazuo

    2011　(46)　206-207　2011/03/15

    Publisher: The Japan Society of Mechanical Engineers

  36. 200 Development of Base-of-Support Enlarged Footwear for Prevention of Slip-related Falls

    NAGAMORI Kazumasa, YAMAGUCHI Takeshi, ONODERA Hiroshi, HOKKIRIGAWA Kazuo

    2011　(46)　202-203　2011/03/15

    Publisher: The Japan Society of Mechanical Engineers

  37. RBセラミックス粒子を充填した熱可塑性樹脂のトライボロジー特性

    山口健, 堀切川一男, 秋山元治, 松本邦裕

    月刊トライボロジー　8　(276)　44-47　2010/08

    Publisher: 新樹社

    ISSN： 0914-6121

  38. 109 Design criteria of High Grip Shoe Sole Pattern for Prevention of Slip Related Falls

    UMETSU Tomoki, YAMAGUCHI Takeshi, KASUGA Kenichi, ITO Takayuki, ISHIZAWA Satoshi, HOKKIRIGAWA Kazuo

    2010　(45)　22-23　2010/03/12

    Publisher: The Japan Society of Mechanical Engineers

  39. 110 Friction and Wear Properties of Sintered Cu alloy Impregnated with Thermo-Reversible Gel-Lubricants

    YAMANO Naoki, YAMAGUCHI Takeshi, SHITARA Yuji, HOKKIRIGAWA Kazuo

    2010　(45)　24-25　2010/03/12

    Publisher: The Japan Society of Mechanical Engineers

  40. 112 Experimental Analysis of Slip between Shoe Sole and Floor during Steady-State and Transient Walking

    YAMANOUCHI Hiroteru, YAMAGUCHI Takeshi, ONODERA Hiroshi, HOKKIRIGAWA Kazuo

    2010　(45)　28-29　2010/03/12

    Publisher: The Japan Society of Mechanical Engineers

  41. 111 Effect of Carbonization Temperature on Friction and Wear of Hard Porous Carbon Materials RH Ceramics

    FURUKAWA Kiminori, YAMAGUCHI Takeshi, SHIKANO Shujun, HOKKIRIGAWA Kazuo

    2010　(45)　26-27　2010/03/12

    Publisher: The Japan Society of Mechanical Engineers

  42. トライボロジーとバイオメカニクスの融合による歩行形態図の構築と応用に関する研究

    山口健

    翠巒　(23)　14　2010/03

    Publisher: 青葉工学振興会

  43. 東北大学堀切川・山口(健）研究室におけるトライボロジーの実践教育

    堀切川一男, 山口健

    トライボロジスト　54　(12)　掲載予定　2009/12

    Publisher: 養賢堂

  44. RBセラミックス粉体を用いた低摩擦および高摩擦複合材料の開発と応用

    山口健, 堀切川一男

    粉体技術　1　(12)　80-85　2009/12

    Publisher: 日本粉体工業技術協会

    ISSN： 1883-3292

  45. トライボロジーWho's Who 東北大学 堀切川・山口（健）研究室

    堀切川一男, 山口健

    トライボロジスト　54　(8)　512　2009/08

    Publisher: 新樹社

  46. Hokkirigawa and T. Yamaguchi Laboratory, Tohoku University

    K. Hokkirigawa, T. Yamaguchi

    JOURNAL OF JAPANESE SOCIETY OF TRIBOLOGISTS　54　(8)　512-512　2009

    ISSN： 0915-1168

  47. 低摩擦ボブスレーランナーの研究開発

    山口健, 堀切川一男

    (社）自動車技術会中部支部支部報　(63)　20-23　2008/10

    Publisher: (社）自動車技術会中部支部

    ISSN： 1348-3676

  48. 117 Development of High Wear Resistant Current Collector Materials by Use of RB ceramics

    SHIBATA Kei, YAMAGUCHI Takeshi, MISHIMA Junichiro, HOKKIRIGAWA Kazuo

    2008　(43)　35-36　2008/03/15

    Publisher: The Japan Society of Mechanical Engineers

  49. 研究会報告 摩擦の実験ノート

    摩擦の実験講座研究会

    トライボロジスト　52　(10)　2007/10

    Publisher: 新樹社

  50. RBセラミックスのトライボマテリアルとしての応用

    山口健, 堀切川一男

    月刊トライボロジー　240　(8)　36-39　2007/08/10

    Publisher: 新樹社

    ISSN： 0914-6121

  51. Prologue to the Special Issue on "New Tribo-Materials and Their Applications"

    YAMAGUCHI Takeshi

    52　(2)　100-100　2007/02/15

    ISSN： 0915-1168

  52. 硬質多孔性炭素材料ＲＢセラミックスの開発とその応用事例

    山口健, 堀切川一男

    トライボロジスト　52　(2)　114-119　2007/02

  53. 米ぬかを原料とする硬質多孔性炭素材料「RBセラミックス」

    山口健, 堀切川一男

    セラミックス誌　41　(2)　89-93　2006/02

    Publisher: 日本セラミックス協会

    ISSN： 0009-031X

  54. Development of a Low Friction Runner and Analysis of the New Start Technique for Bobsleigh

    Kazuo Hokkirigawa, Takeshi Yamaguchi

    Journal of The Surface Science Society of Japan　26　(12)　48-51　2005/12/10

    Publisher: The Surface Science Society of Japan

    DOI： 10.1380/jsssj.26.762 　

    ISSN： 0388-5321

    More details Close

    It was found that the key points of time reduction of bobsleigh were to reduce friction resistance between the runner and ice, and to improve the start technique, from the results of bobsleigh's dynamic analysis. Then, the authors designed and manufactured a new bobsleigh runner based on elastic-plastic contact analysis, which realized minimum contact area between the runner and ice within the shape that prevents ploughing term in friction force. The developed bobsleigh runner based on the analysis was named as "Nagano Special". Additionally, the authors suggested a new start technique called "Keri-Nori", which was quite different from the conventional start technique of the Japanese bobsleigh team, and verified its benefit. By using the newly developed bobsleigh runner "Nagano Special" and the new start technique "Keri-Nori", the Japanese bobsleigh team took the 4th place among the world 44 teams in the international official tryout held on February 1998 just before Nagano Olympic Games.

  55. Development of hard porous carbon materials "RB ceramics" made from rice bran

    堀切川一男, 山口健, 村山順一, 鹿野秀順

    農林水産技術研究ジャーナル　26　(10)　37-41　2003/09

  56. Study on the control of wear of ultrasonic motor

    ADACHI Koshi, YAMASHITA Chikara, YAMAGUCHI Takeshi, ISHIMINE Yusaku, KATO Koji

    2002　(37)　132-133　2002/03/16

    Publisher: The Japan Society of Mechanical Engineers

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Books and Other Publications 12

  1. 米の機能性食品化と高度加工・利用技術

    山口健,堀切川一男

    テクノシステム　2022

  2. 高分子トライボロジー

    山口 健, 柴田圭, 堀切川一男

    技術情報協会　2020/01

  3. 数値解析と表面分析によるトライボロジー現象の解明とその制御

    山口 健

    テクノシステム　2018/04

  4. 狙い通りの触覚・触感をつくる技術

    堀切川一男, 柴田圭, 山口健, 保井秀太, 萬秀憲

    サイエンス＆テクノロジー　2017/11/28

  5. バイオマス由来の高機能材料

    山口健, 柴田圭, 堀切川一男

    エヌ・ティー・エス　2016/11

  6. Spherical and Fibrous Filler Composites

    Kei Shibata, Takeshi Yamaguchi, Kazuo Hokkirigawa

    John Wiley & Sons　2016/09

  7. 高分子トライボロジーの制御と応用

    堀切川一男, 山口健, 柴田圭

    シーエムシー出版　2015/06

  8. トライボロジー設計マニュアル

    山口健, 堀切川一男

    テクノシステム　2015/05

  9. 4.6 Controlling water-based or oil-based film between shoes and the floor to prevent slips and falls, in Hydrated Materials - Applications in Biomedicine and the Environment, eds. Yoshitaka Nakanishi

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    Pan Stanford Publishing　2014/02

    ISBN: 9789814463225

  10. 異種材料界面の測定と評価

    柴田圭, 山口健, 堀切川一男

    テクノシステム　2012/03/21

  11. セラミックデータブック2007年版

    堀切川一男, 山口健

    工業製品技術協会　2007/09

  12. エコマテリアルハンドブック

    堀切川一男, 山口健

    丸善株式会社　2006/12

Show all Show first 5

Presentations 158

  1. 皮膚のすべり止め剤の摩擦特性に関する研究

    島倉俊宏, 山口健, 川崎隆広, 堀切川一男

    日本機械学会東北支部第48期秋季講演会　2012/09/22

  2. RBセラミックス粒子を充填したポリアミド66樹脂とステンレス鋼の摩擦・摩耗特性

    伊福遼太, 柴田圭, 山口健, 堀切川一男

    日本機械学会東北支部第48期秋季講演会　2012/09/22

  3. RBセラミックス粒子を充填したPEEK樹脂の水潤滑下及び油潤滑下における摩擦・摩耗特性

    山口健, 金鎭杰, 柴田圭, 堀切川一男

    日本機械学会東北支部第48期秋季講演会　2012/09/22

  4. 転倒抑制効果を有する支持基底幅拡大フットウェアの開発

    福澤伸哉, 山口健, 大川幸彦, 小野寺宏, 堀切川一男

    日本機械学会東北支部第48期秋季講演会　2012/09/22

  5. 靴の指示基底幅拡大による側方すべり転倒抑制効果に関する研究

    山口健, 福澤伸哉, 大川幸彦, 小野寺宏, 堀切川一男

    日本トライボロジー学会トライボロジー会議2012秋室蘭　2012/09/16

  6. もみ殻を原料とするＲＨセラミックスの低摩擦・低摩耗発現メカニズム

    柴田圭, 山口健, 堀切川一男

    日本トライボロジー学会トライボロジー会議2012秋室蘭　2012/09/16

  7. 自動車タイヤ用ゴム材料の耐摩耗性向上に関する研究

    山口健, 高橋竜也, 松本浩幸, 小出征史, 堀切川一男

    日本トライボロジー学会トライボロジー会議2012秋室蘭　2012/09/16

  8. スポーツシューズ用ソール材料の大気中無潤滑下における摩擦・摩耗特性

    種村駿, 森安健太, 山口健, 柴田圭, 西脇剛史, 堀切川一男

    日本トライボロジー学会トライボロジー会議2012秋室蘭　2012/09/16

  9. 樹脂フォーム／ゴム積層材の摩擦挙動に及ぼす垂直荷重の影響

    森安健太, 西脇剛史, 柴田圭, 山口健, 堀切川一男

    日本トライボロジー学会トライボロジー会議2012秋室蘭　2012/09/16

  10. Si含有DLC被膜の表面粗さと摩擦係数のすべり速度依存性の関係

    安藤淳二, 山口健, 堀切川一男

    日本トライボロジー学会トライボロジー会議2012秋室蘭　2012/09/16

  11. High grip footwear outsole using hybrid rubber surface pattern to prevent slip and fall International-presentation

    Takeshi Yamaguchi, Kenichi Kasuga, Takayuki Ito, Satoru Ishizawa, Kazuo Hokkirigawa

    ISGPR 2012　2012/06/24

  12. Wide base-of-support footwear to increase lateral stability of older adults International-presentation

    Takeshi Yamaguchi, Kenneth Cheng, Stephanie Middleton, Sandra Mckay, Adrian Liggins, Brian Maki

    ISPGR 2012　2012/06/24

  13. ribology and biomechanics of gait: to prevent slips and falls during walking International-presentation

    15th Nordic Symposium on Tribology (NORDTRIB 2012)　2012/06/14

  14. Improvement of tribological properties of thermoplastic resin by using rice bran ceramics particulate as wear-resistant fillers International-presentation

    Kei Shibata, Takeshi Yamaguchi, Kazuo Hokkirigawa

    NORDTRIB 2012　2012/06/12

  15. Development of high grip footwear outsole using hybrid rubber pattern International-presentation

    Takeshi Yamaguchi, Kenichi Kasuga, Takayuki Ito, Storu Ishizawa, Kazuo Hokkirigawa

    NORDTRIB 2012　2012/06/12

  16. RBセラミックス粒子を充填したPEEK樹脂の水潤滑下における摩擦・摩耗特性

    山口健, 針生渉, 薄翔矢, 金鎭杰, 堀切川一男

    日本トライボロジー学会トライボロジー会議2012春東京　2012/05/14

  17. RBセラミックス粒子の充填によるポリアミド66樹脂の耐摩耗発現機構の解明

    柴田圭, 山口健, 浦部達広, 伊福遼太, 堀切川一男

    日本トライボロジー学会トライボロジー会議2012春東京　2012/05/14

  18. 樹脂フォーム/ゴム積層材の摩擦挙動

    森安健太, 西脇剛史, 柴田圭, 山口健, 堀切川一男

    日本トライボロジー学会トライボロジー会議2012春東京　2012/05/14

  19. すべり転倒危険性の低減効果を有する支持基底拡大フットウェアの開発

    矢野将, 山口健, 小野寺宏, 堀切川一男

    日本機械学会東北支部第47期総会・講演会　2012/03/13

  20. Experimental analysis of the distribution of traction coefficient between shoe sole and ground surface in running International-presentation

    Kenta Moriyasu, Takeshi Nishiwaki, Takeshi Yamaguchi, Kazuo Hokkirigawa

    International Tribology Conference Hiroshima 2011　2011/10/30

  21. Analysis of microscopic wear mechanism of copper/carbon/rice bran ceramics composites International-presentation

    Kei Shibata, Takeshi Yamaguchi, Tatsuhiro Urabe, Ryota Ifuku, Kazuo Hokkirigawa

    International Tribology Conference Hiroshima 2011　2011/10/30

  22. Development of novel rubber surface pattern to increase static and kinetic friction coefficients on wet surfaces International-presentation

    Kazuo Hokkirigawa, Takeshi Yamaguchi, Yusuke Ishizuka, Katsufumi Inazawa, Kenichi Kasuga, Takayuki Ito, Satoru Ishizawa

    International Tribology Conference Hiroshima 2011　2011/10/30

  23. Tribological and kinematic analysis of gait during transient walking International-presentation

    Takeshi Yamaguchi, Masaru Yano, Kazumasa Nagamori, Hiroshi Onodera, Kazuo Hokkirigawa

    International Tribology Conference Hiroshima 2011　2011/10/30

  24. Development of wide base-of-support footwear to prevent falls due to induced slips International-presentation

    Takeshi Yamaguchi, Masaru Yano, Kazumasa Nagamori, Shinya Fukuzawa, Hiroshi Onodera, Kazuo Hokkirgawa

    International Tribology Conference Hiroshima 2011　2011/10/30

  25. Effect of treatment containing water-soluble keratin on friction of human hairs

    Kazuo Hokkirigawa, Takeshi Yamaguchi, Tatsuya Tsuda, Tetsuro Matsumoto, Keietsu Abe, Kazuo Hokkirigawa, Takeshi Yamaguchi, Tatsuya Tsuda, Tetsuro Matsumoto, Keietsu Abe

    International Tribology Conference Hiroshima 2011　2011/10/30

  26. Effect of surface texture on contact stiffness of shim spacer International-presentation

    Kazuo Hokkirigawa, Takeshi Yamaguchi, Jun Enta, Koichi Matsumoto

    International Tribology Conference Hiroshima 2011　2011/10/30

  27. Low friction mechanism of hard porous carbon/silica composites made from rice husk

    Takeshi Yamaguchi, Yuta Tanaka, Kazuo Hokkirigawa

    International Tribology Conference Hiroshima 2011　2011/10/30

  28. Friction and wear properties of PEEK composites filled with RB ceramics particles International-presentation

    Takeshi Yamaguchi, Sohei Nishio, Wataru Haryu, Kazuo Hokkirigawa

    International Tribology Conference Hiroshima 2011　2011/10/30

  29. グリップ性能に優れるゴム表面パターンの開発と応用

    山口健, 稲澤勝史, 春日憲一, 伊藤貴之, 石沢智, 堀切川一男

    日本機械学会東北支部第47期秋季講演会　2011/09/22

  30. ゴム表面への溝形成によるゴムの耐摩耗性向上に関する研究

    山口健, 小林大久朗, 松本浩幸, 小出征史, 堀切川一男

    日本機械学会東北支部第47期秋季講演会　2011/09/22

  31. RBセラミックス粒子を充填したポリエーテルエーテルケトン樹脂の摩擦・摩耗特性

    山口健, 針生渉, 堀切川一男

    日本機械学会東北支部第47期秋季講演会　2011/09/22

  32. RBセラミックス粒子充填による熱可塑性樹脂の耐摩耗性発現メカニズムに関する研究

    柴田圭, 浦部達広, 山口健, 堀切川一男

    日本機械学会東北支部第47期秋季講演会　2011/09/22

  33. Experimental analysis of traction coefficient of shoe/floor contact during walking International-presentation

    T. Yamaguchi, M. Yano, H. Onodera, K. Hokkirigawa

    ICoBT 2011 (International Conference on BioTribology)　2011/09/18

  34. Fall prevention with a robot shoes system

    Hiroshi Onodera, Takeshi Yamaguchi, Kazumasa Nagamori, Masaru Yano, Shinya Fukuzawa, Yasuhisa Hirata, Kazuo Hokkirigawa

    第29回日本ロボット学会学術講演会　2011/09/09

  35. すべり転倒抑制のための支持基底面拡大フットウェアの開発

    山口健, 永盛一優, 矢野将, 福澤伸哉, 小野寺宏, 堀切川一男

    日本トライボロジー学会トライボロジー会議2011春東京　2011/05/23

  36. 微視的摩耗機構の解析に基づく銅/カーボン/RBセラミックス複合材料の摩耗予測式の提案

    柴田圭, 山口健, 浦部達広, 伊福遼太, 堀切川一男

    日本トライボロジー学会トライボロジー会議2011春東京　2011/05/23

  37. 銅/カーボン/RBセラミックス複合材料の摩擦・摩耗に及ぼすRBセラミックス粒子の粒径及び配合率の影響

    伊福遼太, 山口健, 柴田圭, 堀切川一男

    日本機械学会東北学生会 第41回卒業研究発表講演会　2011/03/03

  38. 靴の支持基底面拡大による着座・起立動作時のすべり転倒抑制効果に関する研究

    福澤伸哉, 山口健, 永盛一優, 小野寺宏, 堀切川一男

    日本機械学会東北学生会 第41回卒業研究発表講演会　2011/03/03

  39. すべり転倒抑制効果を有する支持基底面拡大フットウェアの開発

    永盛一優, 山口健, 小野寺宏, 堀切川一男

    日本機械学会東北支部第46期総会・講演会　2011/03

  40. 羽毛由来水溶性ケラチンの毛髪手触り感向上効果の摩擦試験による評価

    津田拓也, 山口健, 阿部敬悦, 高橋徹, 堀切川一男

    日本機械学会東北支部第46期総会・講演会　2011/03

  41. Analysis of the slip-related falls and fall prevention with an intelligent shoe system International-presentation

    Hiroshi Onodera, Takeshi Yamaguchi, Hiroteru Yamanouchi, Kazumasa Nagamori, Masaru Yano, Yasuhisa Hirata, Kazuo Hokkirigawa

    IEEE BIOROB 2010　2010/09/26

  42. ATF潤滑下におけるSi含有DLC被膜の摩擦係数のすべり速度依存性

    安藤 淳二, 山口 健, 津田 拓也, 堀切川 一男, 高橋 直子, 遠山 護, 村瀬 篤, 大森 俊英

    日本トライボロジー学会トライボロジー会議2010秋福井　2010/09/14

  43. すべり転倒防止のための耐滑靴底パターンに関する研究

    山口健, 石塚脩之, 春日憲一, 伊藤貴之, 石沢智, 堀切川一男

    日本トライボロジー学会トライボロジー会議2010秋福井　2010/09/14

  44. 過渡歩行におけるすべり転倒挙動に関する研究

    山口健, 矢野将, 永盛一優, 小野寺宏, 堀切川一男

    日本トライボロジー学会トライボロジー会議2010秋福井　2010/09/14

  45. 大気中無潤滑下におけるRHセラミックスの摩擦・摩耗に及ぼす炭化温度の影響

    山口健, 田中雄太, 堀切川一男

    日本トライボロジー学会トライボロジー会議2010秋福井　2010/09/14

  46. RBセラミックス粒子を充填したPEEKの大気中無潤滑下における摩擦・摩耗特性

    山口健, 西尾壮平, 松本邦裕, 秋山元治, 堀切川一男

    日本トライボロジー学会トライボロジー会議2010秋福井　2010/09/14

  47. 銅/炭素/RBセラミックス複合材料の摩擦・摩耗に及ぼす接触圧力の影響

    柴田圭, 山口健, 浦部達広, 横山信行, 堀切川一男

    日本トライボロジー学会トライボロジー会議2010秋福井　2010/09/14

  48. 通常歩行と過渡歩行における靴底/床面のすべり挙動解析

    山内浩彰, 山口健, 小野寺宏, 堀切川一男

    日本機械学会東北支部第45期総会・講演会　2010/03/12

  49. もみ殻を原料とする硬質多孔性炭素材料RHセラミックスの摩擦・摩耗に及ぼす炭化温度の影響

    古川公則, 山口健, 鹿野秀順, 堀切川一男

    日本機械学会東北支部第45期総会・講演会　2010/03/12

  50. すべり転倒抑制のための靴底パターンの設計に関する研究

    梅津智樹, 山口健, 春日憲一, 伊藤貴之, 石沢智, 堀切川一男

    日本機械学会東北支部第45期総会・講演会　2010/03/12

  51. 熱可逆性ゲル状潤滑剤を含浸した焼結銅合金の摩擦・摩耗特性

    山野尚紀, 山口健, 設楽裕治, 堀切川一男

    日本機械学会東北支部第45期総会・講演会　2010/03/12

  52. ribological and kinematic analysis of walking-style for reducing the peak traction coefficient between shoe sole and floor International-presentation

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    World tribology congress 2009　2009/09/06

  53. Tribological behavior of hard porous carbon materials Rice Husk ceramics International-presentation

    Dugarjav Tuvshin, Takeshi Yamaguchi, Kiminori Furukawa, Shohei Katakura, Kazuo Hokkirigawa

    World tribology congress 2009　2009/09/06

  54. Tribological properties of newly developed Cu/C/RBC composites as pantograph slider material of railway current collector International-presentation

    Kei Shibata, Takeshi Yamaguchi, Yuta Yao, Akihiko Ishizu, Nobuyuki Yokoyama, Junichiro Mishima, Kazuo Hokkirigawa

    World tribology congress 2009　2009/09/06

  55. Tribological properties of newly developed resin/RB ceramics composites

    Motoharu Akiyama, Kunihiro Matsumoto, Takeshi Yamaguchi, Kazuo Hokkirigawa

    World tribology congress 2009　2009/09/06

  56. Tribological properties of DLC-Si film under oil lubricated condition International-presentation

    Junji Ando, Takeshi Yamaguchi, Taro Endo, Naoko Takahashi, Mamoru Tohyama, Atushi Murase, Toshihide Ohmori, Kazuo Hokkirigawa

    World tribology congress 2009　2009/09/06

  57. Development of Anti-skid Shoe Sole on Lubricated Smooth Surface by Use of Hybrid Tread Pattern International-presentation

    Takeshi Yamaguchi, Tomoki Umetsu, Yusuke Ishizuka, Kenichi Kasuga, Takayuki Ito, Satoru Ishizawa, Kazuo Hokkirigawa

    17th World Congress on Ergonomics (IEA2009)　2009/08/09

  58. Experimental analysis of Relationship between Target Zero Moment Point and Base of Support for evaluation of the potential of Slip-related Falls International-presentation

    Takeshi Yamaguchi, Shintaro Hatanaka, Hiroteru Yamanouchi, Hiroshi Onodera, Kazuo Hokkirigawa

    17th World Congress on Ergonomics (IEA2009)　2009/08/09

  59. Walking Mode Maps for Prevention of Slip-related Falls International-presentation

    The 3rd International Conference on Manufacturing, Machine Design and Tribology (ICMDT2009)　2009/06/25

  60. Friction and Wear Properties of Cu/C/RBC Composite as Pantograph Slider Material of Railway Current Collector International-presentation

    Kei Shibata, Takeshi Yamaguchi, Yuta Yao, Akihiko Ishizu, Nobuyuki Yokoyama, Junichiro Mishima, Kazuo Hokkirigawa

    The 3rd International Conference on Manufacturing, Machine Design and Tribology(ICMDT2009)　2009/06/25

  61. Friction and wear properties of f Rice Husk Ceramics under Dry Condition International-presentation

    Tuvshin Dugarjav, Takeshi Yamaguchi, Kazuo Hokkriigawa

    The 3rd International Conference on Manufacturing, Machine Design and Tribology(ICMDT2009)　2009/06/25

  62. Effect of step length and walking speed on traction coefficient and slip between shoe sole and walkway

    日本トライボロジー学会トライボロジー会議2009春東京　2009/05/19

  63. 真空環境におけるＲＢセラミックスピンとＲＢセラミックスディスクの摩擦・摩耗特性

    山口健, 石崎達也, 堀切川一男

    日本トライボロジー学会トライボロジー会議2009春東京　2009/05/18

  64. Development and applications of hard porous carbon materials RB ceramics through industry-academia-government collaboration in Japan International-presentation

    nanotec2009.it　2009/03/31

  65. Development and applications of hard porous carbon materials RB ceramics through industry-academia-government collaboration in Japan International-presentation

    nanotec2009.it　2009/03/31

  66. Development of hard porous carbon materials RB ceramics and their practical applications International-presentation

    イタリアナノテク企業ミッション　2009/02/23

  67. RBセラミックスを用いたすり板材料の研究

    横山信行, 三島潤一郎, 堀切川一男, 山口健, 柴田圭

    第15回鉄道技術・政策連合シンポジウム（J-RAIL2008）　2008/12/16

  68. Friction and wear properties of new hard porous carbon materials International-presentation

    Tuvshin Dugarjav, Takeshi Yamaguchi, Kazuo Hokkirigawa

    2nd International Conference on Advanced Tribology 2008 (iCAT)　2008/12/03

  69. The effect of load carrying on the traction coefficient between shoe sole and floor during walking International-presentation

    Takeshi Yamaguchi, Hiroteru Yamanouchi, Shintaro Hatanaka, Kazuo Hokkirigawa

    2nd International Conference on Advanced Tribology 2008 (iCAT 2008)　2008/12/03

  70. Development of high wear resistant composites for pantograph sliders of railway current collector International-presentation

    Kei Shibata, Yuta Yao, Takeshi Yamaguchi, Junichiro Mishima, Kazuo Hokkirigawa

    2nd International Conference on Advanced Tribology 2008 (iCAT 2008)　2008/12/03

  71. Proposal and application of walking mode maps International-presentation

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    2nd International Conference on Advanced Tribology 2008 (iCAT 2008)　2008/12/03

  72. J-PARC用材料・機器の耐放射性：RBセラミックス使用のリニアモーションガイド

    渡辺勇一, 草野譲一, 堀切川一男, 山口健, 白田良晴

    第3回高崎量子応用研究シンポジウム　2008/10/09

  73. RBセラミックス及びその複合材料の開発と応用

    (社）日本ゴム協会 第78回トライボロジー研究部会　2008/09/22

  74. 靴底と床の接線力係数に及ぼす荷物運搬の影響

    山口健, 山内浩彰, 畠中慎太郎, 堀切川一男

    日本トライボロジー学会トライボロジー会議　2008/09/16

  75. Friction and wear properties of Rice Husk ceramics under dry condition

    Tuvshin Dugarjav, Takeshi Yamaguchi, Kazuo Hokkirigawa

    日本トライボロジー学会トライボロジー会議　2008/09/16

  76. Cu/C/RBC複合材料の通電条件下における摩擦・摩耗特性

    柴田圭, 山口健, 八尾勇太, 三島潤一郎, 堀切川一男

    日本トライボロジー学会トライボロジー会議　2008/09/16

  77. ポリベンゾイミダゾール樹脂の大気中無潤滑下における摩擦・摩耗特性

    山口健, 清水優子, 堀切川一男

    日本トライボロジー学会トライボロジー会議　2008/09/16

  78. 歩行中のすべりに起因する転倒の防止に関する研究

    山口健, 畠中慎太郎, 山内浩彰, 小野寺宏, 堀切川一男

    日本トライボロジー学会トライボロジー会議　2008/09/16

  79. Cu/C/RBC複合材料の水潤滑下における摩擦・摩耗特性

    柴田圭, 山口健, 八尾勇太, 堀切川一男

    日本トライボロジー学会トライボロジー会議　2008/09/16

  80. 真空環境におけるＲＢセラミックスのトライボロジー特性

    山口健, 室井直樹, 石崎達也, 堀切川一男

    日本トライボロジー学会トライボロジー会議 東京2008-5　2008/05/12

  81. Tribological properties of hard porous carbon materials made from rice husk under dry condition

    Dugarjav Tuvshin, Takeshi Yamaguchi, Shohei Katakura, Kazuo Hokkirigawa

    日本トライボロジー学会トライボロジー会議 東京2008-5　2008/05/12

  82. 大気中無潤滑下におけるCu/C/RBC複合材料のトライボロジー特性

    柴田圭, 山口健, 八尾勇太, 三島潤一郎, 堀切川一男

    日本トライボロジー学会トライボロジー会議 東京2008-5　2008/05/12

  83. Kinematic and tribological analysis of slip phenomena during walking International-presentation

    Takeshi Yamaguchi, Shintaro Hatanaka, Kazuo Hokkigawa

    The Ergonomics Society Annual Conference 2008　2008/04/01

  84. ＲＢセラミックスを配合した耐摩耗集電材料の開発

    柴田圭, 山口健, 三島潤一郎, 堀切川一男

    日本機械学会東北支部第43期総会・講演会　2008/03/15

  85. 歩行中のすべりを防ぐには？ ～すべりにくい歩行方法の検討と耐滑路面・靴底材料の開発

    三重県科学技術振興センター平成19年度工業研究部金属研究室研究成果発表会　2008/03/11

  86. Development of hard porous carbon materials RB ceramics and their practical applications International-presentation

    Kazuo Hokkirigawa, Takeshi Yamaguchi

    The 5th International Symposium on Mechanical Science Based on Nanotechnology, Sendai, Japan, March 6-7, 2008　2008/03/06

  87. 産学連携による生活支援機器開発の取組とそのポイントについて

    宮城県生活支援機器開発研究会　2008/02/15

  88. Development and applications of hard porous carbon materials RB ceramics made from Rice bran International-presentation

    Takeshi Yamaguchi, Kazuo Hokkirigawa

    Malaysia-Japan International Symposium on Advanced Technology 2007 (MJISAT 2007)　2007/11/12

  89. ATF潤滑下の摩擦におけるSi含有DLC膜の損傷形態の評価

    安藤淳二, 堀切川一男

    日本トライボロジー学会トライボロジー会議2007秋佐賀　2007/09

  90. 銅/ＲＢセラミックス複合材料の大気中無潤滑下における摩擦・摩耗特性の解明

    柴田圭, 三島潤一郎, 堀切川一男

    日本トライボロジー学会トライボロジー会議2007秋佐賀　2007/09

  91. 人間の歩行におけるトライボロジー（第１報：歩行中のすべり発生に及ぼす歩幅，歩行速度の影響）

    畠中慎太郎, 太田靖, 堀切川一男

    日本トライボロジー学会トライボロジー会議2007秋佐賀　2007/09

  92. 人間の歩行におけるトライボロジー（第2報：通常歩行とナンバ歩行における接線力係数の比較）

    畠中慎太郎, 太田靖, 堀切川一男

    日本トライボロジー学会トライボロジー会議2007秋佐賀　2007/09

  93. ＲＢセラミックスの真空中における摩擦・摩耗特性

    山口健, 堀切川一男

    日本トライボロジー学会トライボロジー会議2007秋佐賀　2007/09

  94. ダイヤモンド微粒子噴射膜の摩擦・摩耗特性

    山口健, 高橋勝彦, 吉原信人, 厨川常元, 堀切川一男

    日本トライボロジー学会トライボロジー会議2007秋佐賀　2007/09

  95. Study on the effective walking style for prevention of slip International-presentation

    Shintaro Hatanaka, Kenichi Abe, Yasushi Ota, Kazuo Hokkirigawa

    International Conference on slips, trips and falls 2007：From Research to Practice　2007/08

  96. Development of high grip shoe soles by using rubber/RB ceramics composites, International-presentation

    Kazuo Hokkirigawa

    International Conference on slips, trips and falls 2007：From Research to Practice　2007/08

  97. DLC膜のトライボロジー特性と４WDカップリングへの応用事例

    安藤淳二, 大森俊英, 村瀬 篤, 高橋直子, 堀切川一男

    日本トライボロジー学会 固体潤滑シンポジウム2007　2007/07

  98. Proposal of a walking mode map based on slip/non-slip criterion International-presentation

    Kazuo Hokkirigawa

    XXI Congress, International Society of Biomechanics, Taipei, Taiwan, 1-5 July 2007　2007/07

  99. ATF潤滑下におけるSi含有DLC膜のトライボロジー特性

    安藤淳二, 大森俊英, 村瀬篤, 高橋直子, 舟橋直紀, 堀切川一男

    日本トライボロジー学会トライボロジー会議2007春東京　2007/05

  100. 「Development of “Sendai-Hokkirigawa model” as an effective collaboration between Industry, academia and government

    フィンランド共和国オウル市訪問団の仙台市視察時講演　2007/05

  101. Development of phenol resin/RB ceramics composites for sliding bearing in water

    H. Matsuura, K. Hokkirigawa

    The 4th International Symposium on Mechanical Science Based on Nanotechnology, Sendai, Japan, Feb. 22-23, 2007　2007/02

  102. Development of phenol resin/RB ceramics composites for sliding bearing in water International-presentation

    H. Matsuura, K. Hokkirigawa

    The 4th International Symposium on Mechanical Science Based on Nanotechnology, Sendai, Japan, Feb. 22-23, 2007　2007/02

  103. 入院患者用安全サンダル“安全足進”の開発

    村井ユリ子, 藤盛啓成, 横塚紀美子, 赤坂純逸, 庄子由美, 仲冨千端, 糸山泰人, 里見進, 中村祐次, 堀切川一男

    医療の質・安全学会第１回学術集会　2006/11

  104. Experimental analysis of critical friction condition between shoe sole and floor for safety walking International-presentation

    Y. Suzuki, K. Abe, R. Aiuchi, Y. Ota, N. Miyata, K. Hokkirigawa

    The 3rd Asia International Conference on Tribology (ASIATRIB 2006 KANAZAWA, JAPAN), Kanazawa, Japan, Oct. 16-19, 2006　2006/10

  105. Development of high friction shoe soles using rubber/RB ceramics composites International-presentation

    K. Hokkirigawa, Y. Suzuki, K. Abe, R. Aiuchi

    The 3rd Asia International Conference on Tribology (ASIATRIB 2006 KANAZAWA, JAPAN), Kanazawa, Japan,Oct. 16-19, 2006　2006/10

  106. Evaluation of slip resistance between shoe soles and floor materials by using portable static friction tester, International-presentation

    K. Abe, Y. Suzuki, R. Aiuchi, T. Nomura, S. Nomura, Y. Ota, N. Miyata, K. Hokkirigawa

    The 3rd Asia International Conference on Tribology (ASIATRIB 2006 KANAZAWA, JAPAN), Kanazawa, Japan, Oct. 16-19, 2006　2006/10

  107. Friction and wear properties of SiC/RB ceramics composites International-presentation

    Y. Zhou, K. Hirao, Y. Kino, H. Matsuura, K. Hokkirigawa

    The 3rd Asia International Conference on Tribology (ASIATRIB 2006 KANAZAWA, JAPAN), Kanazawa, Japan, Oct. 16-19, 2006　2006/10

  108. Friction and wear properties of new hard porous carbon materials made from rice chaff International-presentation

    T. Sekiguchi, H. Toyoshima, E. Kohira, S. Shikano, K. Hokkirigawa

    The 3rd Asia International Conference on Tribology (ASIATRIB 2006 KANAZAWA, JAPAN), Kanazawa, Japan, Oct. 16-19, 2006　2006/10

  109. Development and tribological properties of diamond films by spraying fine diamond particles on bronze, alumina and polyamide 66 substrates International-presentation

    K. Miyazawa, K. Shibata, K. Takahashi, K. Hokkirigawa

    The 3rd Asia International Conference on Tribology (ASIATRIB 2006 KANAZAWA, JAPAN), Kanazawa, Japan, Oct. 16-19, 2006　2006/10

  110. Tribological properties of PA66/RB ceramics composites under dry and oil lubricated conditions International-presentation

    M. Akiyama, K. Matsumoto, K. Hokkirigawa

    The 3rd Asia International Conference on Tribology (ASIATRIB 2006 KANAZAWA, JAPAN), Kanazawa, Japan, Oct. 16-19, 2006　2006/10

  111. The effect of temperature and relative humidity on friction and wear properties of RB ceramics International-presentation

    F. Sato, N. Muroi, K. Hokkirigawa

    The 3rd Asia International Conference on Tribology (ASIATRIB 2006 KANAZAWA, JAPAN), Kanazawa, Japan, Oct. 16-19, 2006　2006/10

  112. Development of hard porous carbon materials RB ceramics and their tribological applications International-presentation

    K. Hokkirigawa

    The 3rd Asia International Conference on Tribology (ASIATRIB 2006 KANAZAWA, JAPAN), Kanazawa, Japan, Oct. 16-19, 2006　2006/10

  113. Friction properties of DLC-Si film under ATF lubricated condition International-presentation

    J. Ando, N. Funabashi, K. Hokkirigawa

    The 3rd Asia International Conference on Tribology (ASIATRIB 2006 KANAZAWA, JAPAN), Kanazawa, Japan, Oct. 16-19, 2006　2006/10

  114. Tribological properties of AWD coupling with DLC-Si coated electromagnetic clutch International-presentation

    J. Ando, T. Saito, N. Sakai, T. Sakai, H. Fukami, K. Nakanishi, H. Mori, H. Tachikawa, T. Ohmori, N. Funabashi, K. Hokkirigawa

    The 3rd Asia International Conference on Tribology (ASIATRIB 2006 KANAZAWA, JAPAN), Kanazawa, Japan, Oct. 16-19, 2006　2006/10

  115. 市・県・大学・企業の地域産学官連携による共同研究の事例紹介」

    産学連携セミナー「第10回寺子屋せんだい」　2006/03

  116. 歩行における靴底と床の摩擦に関する研究

    楢舘宏司, 鈴木雄三, 太田靖, 宮田登

    日本トライボロジー学会トライボロジー会議2005秋東京　2005/11

  117. 歩道用コンクリート平板の耐滑性評価に関する研究

    楢舘宏司, 鈴木雄三, 太田靖, 宮田登, 堀切川一男

    日本トライボロジー学会トライボロジー会議2005秋東京　2005/11

  118. 携帯型静摩擦係数測定機を用いた各種床面の耐滑性評価

    鈴木雄三, 阿部賢一, 相内亮慶, 野村俊夫, 野村修平, 堀切川一男

    日本トライボロジー学会トライボロジー会議2005秋東京　2005/11

  119. RBセラミックス粒子を配合したPA66の微量油潤滑下における摩擦特性

    秋山元治, 松本邦裕, 小野真人, 舟橋直樹, 堀切川一男

    日本トライボロジー学会トライボロジー会議2005秋東京　2005/11

  120. 転がり摩擦駆動“車いす電動ユニット”の開発

    大越秀雄, 内田寿, 畑一志, 青山昌二, 堀切川一男

    日本トライボロジー学会トライボロジー会議2005秋東京　2005/11

  121. Development of PA66/RB ceramics composites as new tribomaterials International-presentation

    M. Akiyama, K. Matsumoto, K. Hokkirigawa

    The 3rd International Symposium on Mechanical Science Based on Nanotechnology, Sendai, Japan, November 18-19, 2005　2005/11

  122. SiC/RBCセラミックスの作製とその摩擦摩耗特性

    周 游, 平尾 喜代司, 切川

    日本セラミックス協会第18回秋季シンポジウム　2005/09

  123. Development of thermoplastic resin/RB ceramics composites and their friction and wear properties under dry and oil lubricated conditions, Development of thermoplastic resin/RB ceramics composites and their friction and wear properties under dry and oil lu International-presentation

    K. Matsumoto, K. Hokkirigawa

    International Tribology Conference Kobe 2005, Kobe, Japan, May 29- June 2, 2005　2005/06

  124. The effect of temperature on friction and wear properties of RB ceramics International-presentation

    F. Sato, K. Hokkirigawa

    International Tribology Conference Kobe 2005, Kobe, Japan, May 29- June 2, 2005　2005/05

  125. Friction and wear properties of RB ceramics under oil lubricated condition International-presentation

    G. Kimura, K. Hokkirigawa

    International Tribology Conference Kobe 2005, Kobe, Japan, May 29- June 2, 2005　2005/05

  126. Development of thermoplastic resin/RB ceramics composites and their friction and wear properties under dry and oil lubricated conditions International-presentation

    M. Akiyama, K. Matsumoto, Kazuo Hokkirigawa

    The 1st International Symposium on Mechanical Science Based on Nanotechnology, Sendai, Japan, February 23-24, 2004.　2005/05

  127. Friction and wear properties of PA66/RB ceramics composite under dry and oil lubricated conditions International-presentation

    M. Akiyama, K. Matsumoto, K. Hokkirigawa

    International Tribology Conference Kobe 2005, Kobe, Japan, May 29- June 2, 2005.　2005/05

  128. Development of rubber/RB ceramics composites as high-grip shoe sole materials International-presentation

    K. Naradate, K. Hokkirigawa

    International Tribology Conference Kobe 2005, Kobe, Japan, May 29- June 2, 2005.　2005/05

  129. Friction and Wear Properties of SiC/Rice Bran Carbon Composite Materials, International-presentation

    Y. Zhou, K. Hirao, K. Hokkirigawa

    The 30th International Conference & Exposition on Advanced Ceramics & Composites, Cocoa Beach, Florida, USA, Jan 22-27, 2006.　2005/05

  130. Wear control of drive tip of ultrasonic motor for precise positioning International-presentation

    K. Adachi, C. Yamashita, Y. Ishimine

    The 15th International Conference on Wear of Materials, San Diego, USA, April 24-28, 2005　2005/04

  131. 超音波モータを用いた摩擦駆動型超精密位置決めステージの開発 -摩耗制御に基づく機械設計-

    足立幸志, 山下主税, 石峯裕作

    日本トライボロジー学会トライボロジー会議2004鳥取　2004/11

  132. RBセラミックスの高温下におけるトライボロジー特性

    佐藤史歩, 堀切川一男

    日本トライボロジー学会トライボロジー会議2004秋鳥取　2004/11

  133. 籾殻を原料とする硬質多孔性炭素材料の摩擦・摩耗特性

    豊嶋秀幸, 鹿野秀順, 堀切川一男

    日本トライボロジー学会トライボロジー会議2004秋鳥取　2004/11

  134. RBセラミックス粒子を配合した PA66の高温下におけるトライボロジー特性

    秋山元治, 松本邦裕, 小野真人, 堀切川一男

    日本トライボロジー学会トライボロジー会議2004秋鳥取　2004/11

  135. 炭化ケイ素/RBセラミックス複合材料の摩擦・摩耗特性

    木野雄介, 周游, 平尾喜代司, 堀切川一男

    日本トライボロジー学会トライボロジー会議2004秋新潟　2004/11

  136. 若手技術者に伝えたい新製品開発の極意 ～第１弾 実践！大学活用術～,

    地域産学連携フェローセミナー　2004/09

  137. 生活に密着したトライボロジーの研究 －Life Support Tribologyのすすめ－

    堀切川一男

    擦の実験講座研究会 公開講演会「身の回りのトライボロジー」　2004/07

  138. ニオブ酸化物におけるトライボエミッションの特性評価

    櫻場大樹, 戸田健司, 上松和義, 佐藤峰夫, 堀切川一男

    電気化学会第71回大会　2004/03

  139. Development of Polymer Composites Mixed with New Porous Carbon Particles –Fundamental Properties and Applications International-presentation

    K. Hokkirigawa

    The 1st International Symposium on Mechanical Science Based on Nanotechnology, Sendai, Japan, February 23-24, 2004.　2004/02

  140. RBセラミックス粒子を配合したPA66の大気中無潤滑下における摩擦・摩耗特性, に及ぼす粒径および配合率の影響

    河村名展, 秋山元治, 松本邦裕, 堀切川一男

    日本トライボロジー学会トライボロジー会議2003秋新潟　2003/11

  141. RBセラミックス粒子を配合したPA66の潤滑下における摩擦特性に及ぼす粒径および配合率の影響

    秋山元治, 河村名展, 松本邦裕, 堀切川一男

    日本トライボロジー学会トライボロジー会議2003秋新潟　2003/11

  142. 射出成形型RBセラミックスの油潤滑下における摩擦・摩耗特性

    木村岳, 田中博文, 堀切川一男

    日本トライボロジー学会トライボロジー会議2003秋新潟　2003/11

  143. RBセラミックス粒子を配合した耐滑ソール材の摩擦特性

    楢舘宏司, 鈴木健, 堀切川一男

    日本トライボロジー学会トライボロジー会議2003秋新潟　2003/11

  144. Development and Application of Hard Porous Carbon Materials “RB Ceramics” International-presentation

    K. Hokkirigawa

    The Second Japan-Taiwan Workshop on Mechanical and Aerospace Engineering, Sendai, Japan, October 17, 2003　2003/09

  145. RBセラミックスを配合した耐滑ソールの開発とその摩擦特性

    楢舘宏司, 鈴木健, 堀切川一男

    日本機械学会東北支部第33回卒業研究発表会　2003/03

  146. RBセラミックス粒子を配合した種々の熱可塑性樹脂のトライボロジー特性

    宮沢健太郎, 松本邦裕, 河村名展, 秋山元治, 堀切川一男

    日本機械学会第33回卒業研究発表会　2003/03

  147. RBセラミックス粒子を配合した種々の熱可塑性樹脂のトライボロジー特性

    松本邦裕, 河村名展, 秋山正治, 堀切川一男

    日本トライボロジー学会トライボロジー会議2002秋仙台　2002/10

  148. 圧縮成形及び射出成形により製造されたRBセラミックスのトライボロジー特性

    田中博文, 堀切川一男

    日本トライボロジー学会トライボロジー会議2002秋仙台　2002/10

  149. 多孔質鋳鉄材料ルーバイズメタルのトライボロジー特性（第１報 無潤滑下及び潤滑下における摩擦の基本特性）

    上野崇, 渡辺猛, 堀切川一男

    日本トライボロジー学会トライボロジー会議2002秋仙台　2002/10

  150. 多孔質鋳鉄材料ルーバイズメタルのトライボロジー特性（第２報 潤滑下における摩擦・摩耗に及ぼす荷重とすべり速度の影響）

    上野崇, 渡辺猛, 堀切川一男

    日本トライボロジー学会トライボロジー会議2002秋仙台　2002/10

  151. RBセラミックス粒子を配合した紳士靴用耐滑ソールの開発とその摩擦特性

    鈴木健, 松谷厚志, 堀切川一男

    日本トライボロジー学会トライボロジー会議2002秋仙台　2002/10

  152. RBセラミックス粒子を配合した安全靴用耐滑ソールの開発とその摩擦・摩耗特性

    堀切川一男, 松谷厚志, 鈴木健

    日本トライボロジー学会トライボロジー会議2002秋仙台　2002/10

  153. Tribologically-based Design of Precise Positioning Stage International-presentation

    K. Adachi, Y. Ishimine, K. Kato

    29th Leeds-Lyon Symposium, Leeds　2002/09

  154. Wear Mode Control of Ultrasonic Motor for Precision Positioning International-presentation

    K. Adachi, K. Kato

    23rd Meeting of International Research Group on Wear of Engineering, Materials of OECD, Coimbra, Portugall,　2002/05

  155. 精密位置決め用超音波モータの摩耗制御の研究

    立幸志, 山下主税, 石峯裕作, 加藤康司

    日本機械学会東北支部第37期講演会　2002/03

  156. 液晶配向用ラビング布の評価のためのトライボシステム加振法の開発

    足立幸志, 加藤康司

    日本トライボロジー学会トライボロジー会議1999秋高松　1999/10

  157. 液晶ディスプレイのための液晶配向用ラビング布の評価システムの開発 -トライボシステム加振法の提案-

    足立幸志, 加藤康司, 千蔵大輔

    1999年度精密工学会秋季大会学術講演会　1999/10

  158. 液晶配向ラビング用布の評価システムの開発,

    日本機械学会1999年度年次大会　1999/07

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Industrial Property Rights 8

  1. シャフト型リニアモータの空隙保持装置

    冨岡 進, 大貫勝弘, 堀切川一男, 山口健

    Property Type: Patent

  2. チェーン

    堀切川 一男, 山口健, 坂爪克行

    特許4536351

    Property Type: Patent

  3. 靴のアウトソール

    森安健太, 西脇剛史, 堀切川一男, 山口健, 柴田圭

    特許第5710083号

    Property Type: Patent

  4. 防滑靴底

    堀切川一男, 山口健, 相内亮慶, 梅津智樹, 春日憲一, 伊藤貴之, 石沢智

    特許第4693068号

    Property Type: Patent

  5. 蝶番

    貝哲也, 吉田洋一, 吉田和仁, 佐藤康弘, 堀切川一男, 山口健, 寺澤曄彦

    特許第4025804号

    Property Type: Patent

  6. ティシュペーパー

    保井秀太, 平田記瑞, 萬秀憲, 堀切川一男, 山口健, 柴田圭, 田辺航, 松村祥平

    特許6210567

    Property Type: Patent

  7. 摩擦係数の測定方法および装置

    野村俊夫, 野村修平, 堀切川一男, 山口健, 柴田圭

    特許5824439

    Property Type: Patent

  8. 集電部材

    YAMAGUCHI Takeshi

    特許5246569

    Property Type: Patent

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Research Projects 21

  1. 油中におけるソフトマテリアルの超高摩擦発現メカニズムの解明と超耐滑靴底の開発

    山口 健, 柴田 圭

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(B)

    Institution: 東北大学

    2023/04/01 - 2026/03/31

  2. 靴底と床面の画像を用いた摩擦係数推定に基づく革新的耐滑性評価システム開発への挑戦

    Takeshi Yamaguchi, Toshiaki Nishi, Kei Shibata

    Institution: Tohiku University

    2024/04 - 2026/03

  3. ウェットな氷面上でのすべり転倒抑制効果を有する硬質繊維混紡耐滑靴底の開発

    柴田 圭, 大西 明宏, 山口 健

    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: 独立行政法人労働者健康安全機構労働安全衛生総合研究所

    2021/04/01 - 2024/03/31

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    硬質繊維としてアラミド繊維及びガラス繊維を，樹脂繊維（軟質）として超高分子量ポリエチレン繊維を用いてベース材料とし、乾燥氷面での摩擦係数向上を期待して、硬質繊維上にゴムドットを配置した試験片を開発した。これらを靴底に張り付け、室温制御下において氷面上に対する摩擦試験を行った。摩擦試験装置として、研究分担先現有の手押し式の床／靴摩擦係係数測定装置を使用した。すべり速度は、人間の転倒時の足の動きの速さといわれる1 m/sまで手押しで実現した。垂直荷重は、ほぼ負荷されない靴の自重程度の5 Nと、氷が破損しない程度の200 Nとした。固体氷上の水分量の同定が困難であるため、保存用冷凍庫から恒温室に移動させ放置する時間を統一することで水分量を同一と見なした。氷点下15度以下で24時間以上保管した氷ブロックを、氷点下5～3度に調整した恒温室に2時間放置して乾燥氷面とした。同条件では視覚及び指の触覚的に水分は感知されなかった。また，氷表面温度は室温と同程度であった。氷点下15度以下で24時間以上保管した氷ブロックを、7～10度に調整した恒温室に2時間放置して湿潤氷面とした。同条件では視覚及び指の触覚的に水分は十分に感知された。また，氷表面温度は0度付近であった。比較材料として、市販の氷用耐滑サイプ形状ゴムブロックのオーバーシューを用いた。その結果、室温氷点下以下の乾燥氷面では、市販オーバーシューが最も静摩擦係数・動摩擦係数ともに高い値を示した。室温がプラス温度の湿潤氷面では、硬質繊維試験片が市販オーバーシューに比べ高い静摩擦係数・動摩擦係数の値を示した。また、静摩擦係数・動摩擦係数ともに、乾燥氷面ではゴムドットの面積率の増加に伴い摩擦係数は増加し、湿潤氷面ではゴムドットの面積率の増加に伴い減少した。

  4. 摩擦に起因するすべり・つまずき転倒機構の解明に基づく転倒予防靴底・床材料の開発

    山口 健, 柴田 圭

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(B)

    Institution: 東北大学

    2020/04/01 - 2023/03/31

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    歩行路中央に設置したフォースプレート上にあらかじめ摩擦係数の異なる2種類の床材を並べ，その上を5名の健常成人男性に歩行させた際の床反力と被験者に取り付けた赤外線反射マーカーの位置を3次元動作解析装置を用いて計測した．被験者には，それぞれ屋内歩行と屋外歩行を模擬した靴下，ウォーキングシューズを履いた条件で歩行するよう指示した．床材は，高摩擦から低摩擦へ，低摩擦から高摩擦へ変化する2種類の条件を設定した．被験者には，身長の40%の歩幅，歩行率110歩/分の通常歩行，身長の20%の歩幅，歩行率100歩/分の高齢者を模擬したすり足歩行の２条件で歩行するよう指示した．その結果，高摩擦から低摩擦に変化する条件では，通常歩行，すり足歩行ともに2枚目の床材への接地後に前方へのすべりが生じたが，転倒は生じなかった．一方，低摩擦から高摩擦に変化する条件では，高齢者を模擬したすり足歩行では，2枚目の床材への接地後に身体が前方に倒れる方向に重心周りのモーメントが増加し，前方へのつまずき転倒危険性が増加することが示唆された．このことから，高齢者に見られるすり足歩行では，足底と床面間の摩擦係数が高い場合には，つまずき転倒が生じやすいことが示された．しかし，通常歩行では，摩擦係数が増加しても前方への重心周りのモーメントは変化しなかった．以上の結果から，いずれの歩行条件においても転倒は生じなかったが，令和2年度の歩行シミュレーションで得られた転倒危険性と足底-床面摩擦の関係を支持する結果が得られた．また，令和2年度に作成した二足歩行の神経筋骨格モデルを足部及び上体を有するモデルに改良し，上記の実験と同様の歩行条件（通常歩行，すり足歩行）で床面の摩擦パラメータを変化させて，シミュレーションを行ったところ，すべり転倒，つまずき転倒が生じない好適な摩擦係数の範囲は0.4～1.1であることが明らかとなった．

  5. Development of polymer composite materials having 10 times higher wear resistacne than steel materials and those applications to tribo-system

    Hokkirigawa Kazuo

    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: Tohoku University

    2019/04/01 - 2022/03/31

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    In this study, polymer composites filled with RB ceramic (RBC) particles were developed and those mechanical properties and tribological properites under water lubrication were experimentally investigated. The hardness and strength of the composites increased with decreasing RBC particle diameter. The results of sliding friction tests under water lubrication indicated that PEEK and POM composites filled with 20 vol% RBC particles with a dimater less than 5 micro-meters exhibited low friction and low specific wear rate less than 10-9 mm2/N. The value of the specific wear rate is 1/10 of that for steel/steel contact under oil lubrication (10-8 mm2/N).The results indicated that the developed composite materials have 10 times higher wear resistance than steel materials under water lubrication.

  6. Development of high slip resistant shoes on the basis of sysytematic investigation of slip-induced fal mechanism during walking

    Yamaguchi Takeshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2016/04/01 - 2019/03/31

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    In this study, the measurement of the traction coefficient between shoe sole and floor during walking indicated that the static and kinetic friction coefficients greater than 0.4 are needed at the shoe-floor interface in order to prevent slip-induced falls. It was also indicated that the gait with a small body lean angle resulted in low traction coefficient, which leads to less slip risk. The shape of shoe tread block which provides the static and kinetic friction coefficients greater than 0.4 over oil-lubricated floor surfaces was found experimentally. In addition, a shoe mounted with miniature tri-axial force sensors was developed and the distribution of required friction coefficient and application direction of friction force in the shoe-floor contact area during walking was investigated. These results will aid in the development of slip-resistant shoe sole over floor surface contaminated with oils.

  7. Development of advanced rubber composite materials used in water utilizing RB ceramics particles as friction modifier

    Hokkirigawa Kazuo

    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: Tohoku University

    2015/04/01 - 2018/03/31

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    In this study, ethylene propylene diene monomer (EPDM) rubber composites filled with rice bran (RB) ceramics particles were developed. The friction and wear properties of the composite materials were investigated under a wide range of sliding velocity and normal load conditions in water. The composite materials exhibited low friction and wear compared to monolithic EPDM rubber under a wide range of sliding velocities and normal loads. Sliding bearing using the composite materials was developed, and satisfactory friction, wear, and seal property were confirmed.

  8. Development of footwear for preventing falls due to induced slip based on tribology and biomechanics analysis

    Yamaguchi Takeshi, HOKKIRIGAWA Kazuo, SHIBATA Kei

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2013/04/01 - 2016/03/31

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    In this study, we developed footwear that is effective in preventing falls due to induced slip in the lateral direction during turning. Turning gait trial on a slippery floor was conducted with healthy young adult participants wearing normal footwear and BOS (base of support) widened footwear. The results indicated that the BOS widened footwear, in which the BOS was widened more than 15 mm in the lateral direction, reduced the frequency of fall by more than 50% compared with the normal footwear. The kinematic analysis revealed that the BOS widened footwear shortened a length of compensatory stepping to prevent falling after slipping, which resulted in the reduced frequency of fall.

  9. Development of low-frictional, high-wear-resistant elastomer and high-frictional, high-wear-resistant resin composites

    HOKKIRIGAWA Kazuo, YAMAGUCHI Takeshi, SHIBATA Kei

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2013/04/01 - 2015/03/31

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    In the present study, a low-frictional elastomer and high-frictional resin composites were developed using low-density particles, which are plant-derived materials, as a friction conditioner. According to the friction tests under a wide range of conditions, the carbon particles which are made from rice bran can contribute to extremely low friction under dry and water lubrication, which the pure elastomer cannot achieve. In addition, the bamboo particles can contribute to higher friction under water and oil lubrication, compared with the pure resin. The elastomer composite filled with the carbon particles was expected to use as bearing, mechanical seal used in water. The resin composite filled with bamboo particles was expected to use as a chopsticks material.

  10. Development of advanced tribomaterials using RB ceramics particles as filler for low friction and low wear

    HOKKIRIGAWA kazuo, YAMAGUCHI Takeshi, SHIBATA Kei

    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: Tohoku University

    2012/04/01 - 2015/03/31

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    In the present study, we developed new composite mateirals using Rice bran ceramics (RBC) particles as a filler that can provide both low friction and high wear resistance. Polyetheretherketone (PEEK) resin/RBC composite and copper (Cu) alloy/RBC composite were developed. The PEEK/RBC composite showed low friction and low wear under water lubrication. This result indicates that the PEEK/RBC composite can be used as a sliding bearing material under water lubrication. The Cu alloy/RBC composite has been succeeded in practical use as high wear-resistant pantograph slider material for current collector of railway.

  11. Development of fall-prevention footwear for elderly people based on mechanism of falling caused by slip

    YAMAGUCHI Takeshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Young Scientists (B)

    Institution: Tohoku University

    2010 - 2011

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    In the present study, we designed and manufactured wide base of support (BOS)footwear, in which BOS was widened in the medial and lateral directions, and examined whether the wide BOS footwear can reduce the risk of fall caused by induced slip. It was demonstrated that more than 10 mm and 15 mm extensions of BOS in the medial and lateral directions, respectively, reduced the risk of lateral fall cause by slip during turning on a contaminated floor surface.

  12. Development of high friction and high wear resistant elastomer filled with hard porous carbon particles with nano-scale pores

    HOKKIRIGAWA Kazuo, YAMAGUCHI Takeshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2009 - 2011

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    The present study revealed optimal conditions, such as hardness of rubber, mean diameter and fraction of RB ceramics particles, in order for synthetic rubber/RB ceramics composites to show high friction under water or oil lubricated condition. Sandals using the rubber/RB ceramics composite sheets as outsole was designed and manufactured. The sandal showed high slip-resistance against wet floor surfaces, which showed the rubber/RB ceramics composites can be applied to high slip-resistant outsole materials

  13. Development of advanced composite materials using RB ceramics particles as wear-reduction filler

    HOKKIRIGAWA Kazuo, YAMAGUCHI Takeshi

    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: Tohoku University

    2009 - 2011

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    In the present study, new thermoplastic resin composite materials and copper alloy composite materials filled with RB ceramics particles, which are hard porous carbon materials RB Ceramics made from rice bran, were developed. The thermoplastic resin/RB ceramics composites and copper alloy/RB ceramics composites showed low friction and high wear resistance as well as low aggression against mating surfaces. It was demonstrated that the copper alloy/RB ceramics composites are available as new pantograph slider materials for current collector of railway.

  14. Development of low friction and high wear resistant polymercomposites filled with hard porous carbon particulate

    YAMAGUCHI Takeshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Young Scientists (B)

    Institution: Tohoku University

    2008 - 2009

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    In this study, new polymer composites filled with RB ceramics particulate (polymer/RB ceramics composites) was developed, and their friction and wear properties were experimentally investigated. The weight fraction of RB ceramics particulate was greater than 50 wt% for each resin. The polymer/RB ceramics composites showed lower friction and lower wear than neat resins (PA66, PA11, PBT, POM, PP) under dry and oil lubricated conditions. Particularly, a remarkable reduction of specific wear rate was obtained for the newly developed composites as compared with the neat resins under dry condition (67-98% reduction) or oil lubricated condition (68-99% reduction).

  15. ナノ気孔を有する硬質多孔性粒子を配合した高摩擦・耐摩耗性エラストマーの開発

    堀切川 一男, 山口 健

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 萌芽研究

    Institution: 東北大学

    2006 - 2008

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    本研究の目的は, 流体存在下においても高摩擦を示す新しいエラストマー系複合材料を開発することである. 平成19年度までの研究結果により, NBR(アクリロニトリルブタジエンゴム)にRBセラミックス粒子を配合することにより, 水潤滑下において高い摩擦が得られること, そして, そのための好適なRBセラミックス粒子の配合率, 平均粒径, ベースゴムのショア硬度などが明らかにされている. そこで, 平成20年度では, これまでの研究で高摩擦を示した平均粒径300μmのRBセラミックス粒子を5wt%配合したショア硬度58HSのNBRについて,直径4mmの高炭素クロム軸受鋼球(JIS SUJ2)を用いて摩擦試験を行い, 耐摩耗性の評価を行った. 実験は, 垂直荷重1.98N, すべり速度0.01m/s, 摩擦繰返し数1,000回, 大気中無潤滑下で行われた. その結果, 同NBR/RBセラミックス複合材料は, NBR単体に比べ, 1/5の比摩耗量を示すことが判った. 摩耗面の光学顕微鏡観察より, NBR単体では, ゴム表面の大規模な流動が観察されたのに対して, NBR/RBセラミックス複合材料では, 大規模な流動は観察されず, またRBセラミックス粒子の脱落も見られなかった. これは, 摩擦によるゴムの流動を硬質なRBセラミックスが抑制し, また, RBセラミックス粒子の気孔部分にゴムが入り込むことによるアンカー効果によって, 粒子の脱落が抑制されたためと考えられる. 以上のことから, 本研究で開発されたNBR/RBセラミックス複合材料は, 流体存在下において高い摩擦係数を示し, かつ耐摩耗性にも優れることが明らかにされた.

  16. Application of RB ceramics prepared by use of injection molding to non-oil tribo-system

    HOKKIRIGAWA Kazuo, YAMAGUCHI Takeshi

    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: Tohoku University

    2006 - 2008

  17. ナノ気孔を有するセル構造体のトライボロジー特性の解明

    山口 健

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 若手研究(B)

    Institution: 東北大学

    2005 - 2006

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    本研究の目的は,ナノ,マイクロサイズの気孔を有するセル構造体の接触機構の解明及びそれに基づくトライボロジー特性改善のためのセル構造の好適設計指針を明らかにすることである.平成18年度に得られた主な結果は以下のとおりである. (1)気孔率が6.72%である成長黒鉛鋳鉄の切削粉を用いて,気孔率がほぼ等しく(17.1%,19.1%)気孔径分布の異なる2種類の多孔質鋳鉄材料を粉末冶金技術によって作製した. (2)幅広いすべり速度,荷重条件(すべり速度:0.001〜4m/s,垂直荷重:0.49〜9.8N)において,気孔率6.72%の多孔質鋳鉄材料は,低すべり速度・高接触圧力条件下及び高すべり速度条件下において油膜破断により,0.2以上の高い摩擦係数を示すのに対して,気孔率17.7%,19.1%の多孔質鋳鉄材料は今回の試験条件の範囲では,明確な油膜破断を興さず,すべての条件において0.2以下の低い摩擦係数を示すことが判った.このことから,気孔率の増加に伴う,含油条件下での摩擦特性の向上が確認された (3)幅広いすべり速度,荷重条件において気孔率6.72%の多孔質鋳鉄材料は,1×10^<-8>mm^2/N以上の高い比摩耗量を示すのに対して,気孔率17.7%,19.1%の多孔質鋳鉄材料はすべての条件において,1×10^<-8>mm^2/N以下の低い比摩耗量を示すことが判った.このことから,気孔率の増加に伴う,含油条件下での耐摩耗性の向上が確認された. (4)気孔径分布の異なる2種類(気孔率:19.1%,17.7%)の多孔質鋳鉄において,気孔径が小さく,かつ気孔径にばらつきの少ない多孔質鋳鉄は,低接触圧力,低すべり速度条件において1×10^<-10>mm^2/N以下の極めて低い比摩耗量を示すことが判った. (5)本研究の結果より,気孔率の増加及び気孔径分布のばらっきの制御により,従来の含油軸受では使用不可能であったすべり速度1m/s1以上の高すべり速度域で使用可能な含油軸受が実現できる可能性があることが判った.

  18. Development of fabrication process of hard porous carbon materials RB ceramics using injection molding and their application to tribo-elements

    HOKKIRIGAWA Kazuo, YAMAGUCHII Takeshi

    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: Tohoku University

    2003 - 2005

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    The Purpose of this study is to develop new fabrication process of RB ceramics by using injection molding, and to apply them to tribo-elements. New RB ceramics fabricated by using injection molding have been developed, and their size reduction rate during carbonization and mechanical properties were clarified in 2003. The new fabrication process of RB ceramics were as follows ; The form of the mixture of RB ceramics and phenol resin was molded by injection molding, and then the new RB ceramics were fabricated by carbonizing the form in nitrogen gas at 900 ℃. It was clarified that the size reduction rate of the newly developed RB ceramics was less than 5% which was one-fifth of that of conventional RB ceramics (25%) made by using press molding. Then, it was also clarified that young's modulus of the newly developed RB ceramics was 15GPa, and the compressive strength was 270MPa which was about 4.5 times higher than that of the conventional RB ceramics. Tribological properties of the newly developed RB ceramics sliding against alumina, bearing steel ball and austenitic stainless steel under dry and oil lubricated conditions were clarified in 2004. As a result, it was clarified that a newly developed RB ceramics showed superior tribological properties under dry and oil lubricated conditions. Therefore, the newly developed RB ceramics fabricated by using injection molding are expected to be practically applied to the materials of sliding bearing. The effect of temperature on tribological properties of the newly developed RB ceramics was clarified in 2005. As a result, it was clarified that the newly developed RB ceramics showed superior tribological properties under dry condition at high temperature. Therefore, the newly developed RB ceramics are expected to be practically applied to the materials of the dry type clutch plates.

  19. ナノ気孔を有するセル構造体の動的接触機構に関する研究

    山口 健

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 若手研究(B)

    Institution: 東北大学

    2003 - 2004

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    本研究の目的は,ナノ気孔を有するセル構造体の静的接触特性及び摩擦・摩耗に及ぼす気孔率・気孔径の影響を明らかにすることにより,ナノ気孔を有するセル構造体の動的接触気孔を解明することである. 平成16年度では,緻密鋳鉄(FC250),成長黒鉛鋳鉄(気孔率:6.72%),成長黒鉛鋳鉄の切削粉を原料として焼結によって作製された気孔率がほぼ等しく(気孔率はそれぞれ19,1%,17.7%),気孔径分布の異なる2種類の多孔質鋳鉄,の計4種類を用いて,含油(緻密鋳鉄については,潤滑油を塗布)条件下における摩擦・摩耗特性に及ぼす気孔率,気孔径の影響を明らかにした.なお,摩擦試験及び摩耗試験は,ボールオンディスク型摩擦・摩耗試験装置により,すべり速度0.001m/s〜4m/s,ヘルツ最大接触圧力100MPa〜700MPaの広範囲な条件下で行った.相手材には高炭素クロム軸受鋼SUJ2を用いた. 本研究でこれまでに得られた主な結果は,以下のとおりである. 1.緻密鋳鉄(FC250)は,400MPa以上の高接触圧力条件下では,すべり速度によらず油膜破断により焼き付きを生じるのに対して,気孔を有する成長黒鉛鋳鉄(気孔:6.72%),多孔質鋳鉄材料(気孔率:19.1%,17.7%)はともに400MPa以上の高接触圧力条件下においても0.2以下の低摩擦を示すことが判った.このことから,多孔質化することによる含油の効果が確認された. 2.成長黒鉛鋳鉄(気孔:6.72%)は,低すべり速度・高接触圧力条件下及び高すべり速度条件下において油膜破断により,0.2以上の高い摩擦係数及び1×10^<-8>mm^2/N以上の高い比摩耗量を示すのに対して,多孔質鋳鉄材料(気孔率:19.1%,17,7%)は今回の試験条件の範囲では,明確な油膜破断を興さず,すべての条件において0.2以下の低い摩擦係数及び1×10^<-8>mm^2/N以下の低い比摩耗量を示すことが判った.このことから,気孔率の増加に伴う,含油条件下でのトライボロジー特性の向上が確認された. 3.気孔径分布の異なる2種類(気孔率:19.1%,17.7%)の多孔質鋳鉄において,気孔径が小さく,かつ気孔径にばらつきの少ない多孔質鋳鉄は,低接触圧力,低すべり速度条件において0.1以下の低い摩擦係数及び1×10^<10>mm^2/N以下の極めて低い比摩耗量を示すことが判った.このことから,気孔率だけでなく,気孔径の制御によりトライボロジー特性の向上を得られることが判った.

  20. Super-low Friction Mechanisms of Carbon Nitride Coatings with Adsorbed Nitrogen Gas

    KATO Koji, ADACHI Koshi, YAMAGUCHI Takeshi

    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: Tohoku University

    2001 - 2003

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    Our research group had found that thin lubricious hard coatings such as amorphous carbon nitride (CNx) coating gave super-low friction (0.01 order of friction coefficient) in particular when combined with adsorbed gases of nitrogen. The purpose of this research was to analyze super-low friction mechanisms of carbon nitride coatings with adsorbed nitrogen gas. In addition, necessary coating condition and operating condition for giving such super low friction was clarified. The following results were mainly obtained. 1.Sliding between CNx coating against CNx coated ball generates stable friction coefficient of about 0.01-0.02 by blowing of nitrogen gas. In such condition, wear rate of ball shows very low value of 1.13x10^<-8>mm^3/Nm. 2.Optimum value of blowing nitrogen gas to generate stable and low friction coefficient is around 2.10cc/mm^2s. 3.Low friction mechanism of the CNx coating by nitrogen gas is explained by two models ;(a)friction mechanism to shows about 0.1 and (b)friction mechanism to show between 0.01 and 0.1. 4.On all wear scars when low friction coefficient of 0.1 is generated in this research, Raman spectra show certain structural changes, indicating the increase in the size and/or number of the sp^2 microdomain that can be considered as a very small graphitic structure. Therefore, it is considered that low friction in this system is generated by the graphitic structure, which has low shearing strength. 5.Friction coefficient of CNx/CNx in particular under N_2 blow increases from 0.01 up to 0.1 by ion irradiation. Thus, it is considered that electrification on the wear surface affect on low friction mechanism of the CNx coating by nitrogen gas.

  21. Development of Tribo-Coating Lubrication Method for the Space Machines and Its Application

    KATO Koji, YAMAGUCHI Takeshi

    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: Tohoku University

    2001 - 2002

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    New technique - TRIBO-COATING of a solid lubricant - have been introduced by our group in order so provide durable low friction in ultra high vacuum. According to this method solid lubricant is evaporating during the process of sliding and depositing on the friction surfaces. The possibility of this method to decrease friction has been shown using pin-on-disk apparatus. The purpose of this research was so show its possibility so apply rolling bearing in high vacuum from the view points of low and stable friction and its endless life. In addition, optimum-coaling condition to give stable and low friction wan clarified. The following results were mainly obtained: (1) Friction coefficient of a ball bearing, which has silicon nitride balls/stainless steel rings and stainless steel retainer, is kept lower than 0.002 by the in-situ tribo-coating with indium. This value is almost same as that of conventional solid lubricant such as ion-plated Ag film. (2) In the case of hybrid bearing with stainless steel races and silicon nitride balls, stable and low friction of 0.002 could be kept until 10^7 cycles with two times tribo-coating of indium. (3) The ceramic bats/stainless steel rings bearing of no retainer shows ten times longer life than of a retainer. (4) Optimum coating speed of indium for tribo-coating was 6-20 nm/min, in which stable and low friction of 0.002 was obtained. (5) Optimum coating thickness during stable friction was 100-400 nm that was formed under contact pressure of 800-1400 MPa.

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Social Activities 17

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  3. 秋田県立横手高校 大学模擬講義

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    安全安心な生活を実現するライフサポートトライボロジー

  4. 興譲館大学講座

    2013/07/11 -

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    米沢興譲館高等学校「興譲館大学講座」において大学模擬講義を行った．

  5. 寺子屋せんだい

    2012/08/31 -

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    「安全安心な社会を実現するライフサポートトライボロジー ～転倒防止のためのバイオメカニクス研究に基づく耐滑製品の開発

  6. 東北大学イノベーションフェアに出展

    2012/03/15 -

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    東北大学イノベーションフェア，2012年3月15日，於東京国際フォーラム，東京に出展した．

  7. 東北大学イノベーションフェアでの講演

    2012/03/15 -

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    「「仙台堀切川モデル」による地域産学官連携に基づく製品開発事例の紹介 －超耐滑フットウェアの開発－」

  8. 東北大と弘進ゴム、作業靴、滑りにくさ30倍 凹凸と平ら交互に配置 油での転倒減らす

    2012/03/08 -

  9. 第52回高分子材料のトライボロジー研究会での特別講演

    2011/11/15 -

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    「RBセラミックス及びその複合材料の開発と応用」

  10. 「学都仙台宮城サイエンスデイ」への出展

    2011/07/11 -

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    「学都宮城サイエンスデイ」へ出展し，地域への科学啓蒙に貢献した

  11. イタリアナノテク企業ミッション

    2009/02/23 -

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    「Development of hard porous carbon materials RB ceramics and their practical applications」

  12. 三重県科学技術振興センター平成19年度工業研究部金属研究室研究成果発表会（共催 第6回桑名鋳物新製品開発研究会）

    2008/03/11 -

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    「歩行中のすべりを防ぐには？ ～すべりにくい歩行方法の検討と耐滑路面・靴底材料の開発～」

  13. 宮城県生活支援機器開発研究会

    2008/02/15 -

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    「産学連携による生活支援機器開発の取組とそのポイントについて

  14. フィンランド共和国オウル市訪問団の仙台市視察時講演

    2007/05/17 -

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    「Development of “Sendai-Hokkirigawa model” as an effective collaboration between Industry, academia and government，

  15. 産学連携セミナー「第10回寺子屋せんだい」

    2006/03/17 -

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    市・県・大学・企業の地域産学官連携による共同研究の事例紹介」

  16. 地域産学連携フェローセミナー

    2004/09/27 -

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    若手技術者に伝えたい新製品開発の極意 ～第１弾 実践！大学活用術～

  17. 摩擦の実験講座研究会 公開講演会「身の回りのトライボロジー」

    2004/07/23 -

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    生活に密着したトライボロジーの研究 －Life Support Tribologyのすすめ－

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  1. 世界初の水潤滑システム実現のための超低摩擦耐摩耗複合材料の開発

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    世界初の水潤滑システム実現のための超低摩擦耐摩耗複合材料の開発

  2. 油や粉体で覆われた危険床面でもすべりにくく転倒防止性に優れた超耐滑シューズの開発

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    油で濡れた床面や粉体で覆われた床面，あるいはそれら両方が混在する床面においても0.4以上の静摩擦係数，動摩擦係数を示すすべりにくく，転倒防止性に優れる超耐滑靴底意匠の開発を行う．

  3. 多機能・高機能CBN装甲タップの開発

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    CBN粒子を切削タップ表面に電着させることにより，工具の寿命向上，加工能率の向上を目指す．

  4. 世界初の「変形しやすく振動吸収性に優れる低摩擦・超耐摩耗ゴム系複合材料」の開発

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    低弾性率や衝撃・振動吸収性などゴムが本来有している性質を保ちながら， ①大気中無潤滑下における摩擦係数が0.2以下を示す ②摩擦音の原因となるスティックスリップを抑制できる ③10-8mm2/N以下の低い比摩耗量を示す の3点を同時に満たすゴム/RBセラミックス複合材料の開発を行う. 具体的には，このような特性を示すための好適なRBセラミックス粒子の平均粒径，充填率，ベースゴム材料の硬度を明らかにする．

  5. RBセラミックスを充填した低摩擦・耐摩耗ゴム材料の開発

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    米ぬかを原料とする硬質多孔性炭素材料RBセラミックスをゴムに配合することにより，通常高摩擦材料として用いられているゴムの低摩擦化を図るとともに，耐摩耗性の向上を目指した基礎的研究を行う．

  6. RBセラミックス使用機器の耐放射線特性調査

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    RBセラミックスの放射線照射後の摺動性の評価試験

  7. ＲＢセラミックスを用いたすり板材料の基礎的研究

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    RBセラミックスを用いたすり板材料の開発を行うに当たり，銅に配合するRBセラミックス粉末の最適粒径，最適配合率を明らかにする．

  8. 地域産学連携における機械システム活用による新事業創出促進に関する調査研究

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    床反力計測装置及び3次元動作解析装置を用いて人間の歩行におけるすべり現象を明らかにし，靴底と床面の間に必要な摩擦係数を明らかにする．

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