Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (7): 26-31.doi: 10.3969/j.issn.1000-565X.2013.07.005

• Mechanical Engineering • Previous Articles     Next Articles

Friction Characteristics of Elastic Soft Tissue in Different Stress- Strain States

Chen Yi- kang   

  1. Institute of Electrical Engineering,Chinese Academic of Sciences,Beijing 100190,China∥University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2012-11-23 Revised:2013-02-27 Online:2013-07-25 Published:2013-06-01
  • Contact: 陈奕钪(1989-)，男，博士生，主要从事微型机器人系统、生物机械工程和微流体分配技术研究． E-mail:chenyikang@mail.iee.ac.cn
  • About author:陈奕钪(1989-)，男，博士生，主要从事微型机器人系统、生物机械工程和微流体分配技术研究．
  • Supported by:

    国家自然科学基金资助项目(61163042)

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Abstract:

In order to reveal the friction characteristics of elastic soft tissues under dynamic loads,the small intestine of rabbit is selected as a sample to test its friction characteristics in different stress- strain states,with steel No.45 base- ball,silastic base- polymethyl methacrylate (PMMA) ball and Teflon base- ball as the coupling parts.The re-sults obtained with steel base- ball coupling part indicate that the average friction coefficient of the small intestine in-creases with the radial strain in a period- like law,and the results obtained with the silastic base- PMMA ball cou-pling part indicate that the average friction coefficient increases with the normal load in the presence of radial strain.Moreover,it is found from the results obtained with Teflon base- ball coupling part that the average friction coefficient decreases with the increase of normal load in the presence of axial strain.

Key words: microrobot, friction characteristic, elastic soft tissue, stress- strain state