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Study on asymmetric nature of thumbnail strain when grasping an object

Research Project

Project/Area Number 26560301
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Rehabilitation science/Welfare engineering
Research InstitutionUtsunomiya University

Principal Investigator

Shimawaki Satoshi  宇都宮大学, 工学(系)研究科(研究院), 准教授 (10344904)

Co-Investigator(Kenkyū-buntansha) SAKAI Naotaka  宇都宮大学, 大学院工学研究科, 教授 (90235119)
Co-Investigator(Renkei-kenkyūsha) NAKABAYASHI Masataka  宇都宮大学, 大学院工学研究科, 助教 (50638799)
Research Collaborator TASHIRO Tomoya  
ITO Yasuaki  
Project Period (FY) 2014-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords母指爪ひずみ / 物体把持 / 物体操作 / 把持力 / 有限要素法 / 有限要素解析
Outline of Final Research Achievements

The purpose of this research was to measure thumbnail strain when grasping an object (cylinder, sphere, and flat plate) and to determine whether asymmetric strain distribution occurs in the radioulnar direction. In addition, we examined the effects of object size and thumb-pressing force. Biaxial strain gauges were attached at three locations on the thumbnail surface (central, radial, and ulnar parts). Each axis of the biaxial strain gauges was aligned to the axial and transverse directions, respectively. When object size was small, the distribution of strain in the axial and transverse directions was asymmetric; however, when object size became large, the asymmetric nature of the strain distribution in either one of the axes disappeared. When grasping a small object, the ulnar surface of the thumb pad is an important contact surface. This was the factor in asymmetric strain distribution occurring in the radioulnar direction.

Report

(3 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • Research Products

    (5 results)

All 2016 2015

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Acknowledgement Compliant: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Thumbnail strain during pressing and plucking of a string2015

    • Author(s)
      Satoshi Shimawaki, Atsushi Nakayama, Masataka Nakabayashi, Naotaka Sakai
    • Journal Title

      Journal of Biomechanical Science and Engineering

      Volume: 10 Issue: 3 Pages: 14-00316-14-00316

    • DOI

      10.1299/jbse.14-00316

    • NAID

      130005109063

    • ISSN
      1880-9863
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 物体把持における母指爪ひずみの非対称性-物体形状,物体サイズ,母指押し付け力の影響-2015

    • Author(s)
      嶋脇聡,中林正隆
    • Journal Title

      人間工学

      Volume: 51 Pages: 420-427

    • NAID

      130005265956

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] 円柱物体把持における母指爪ひずみの非対称性2016

    • Author(s)
      嶋脇聡
    • Organizer
      日本機械学会第28回バイオエンジニアリング講演会
    • Place of Presentation
      東京工業大学
    • Year and Date
      2016-01-09
    • Related Report
      2015 Annual Research Report
  • [Presentation] Thumbnail Strain in Grasping a Cylindrical Object; Effects of Object Size and Thumb Pressing Force2015

    • Author(s)
      Satoshi Shimawaki, Yasumasa Konno
    • Organizer
      3rd International Scientific Conference on Engineering and Applied Science
    • Place of Presentation
      Okinawa, Japan
    • Year and Date
      2015-07-29
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 物体把持における母指爪変形ひずみの計測2015

    • Author(s)
      嶋脇聡、紺野恭正、中林正隆、酒井直隆
    • Organizer
      第27回バイオエンジニアリング講演会
    • Place of Presentation
      新潟市
    • Year and Date
      2015-01-09
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2017-05-10  

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