华南理工大学学报(自然科学版) ›› 2013, Vol. 41 ›› Issue (7): 26-31.doi: 10.3969/j.issn.1000-565X.2013.07.005

• 机械工程 • 上一篇    下一篇

不同应力应变状态下弹性软体的摩擦特性

陈奕钪   

  1. 中国科学院 电工研究所,北京 100190∥中国科学院大学,北京 100049
  • 收稿日期:2012-11-23 修回日期:2013-02-27 出版日期:2013-07-25 发布日期:2013-06-01
  • 通信作者: 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
  • 作者简介: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.
  • 基金资助:

    国家自然科学基金资助项目(61163042)

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)

摘要: 为了揭示弹性软体在动态作用力下的摩擦特性,分别以45 钢模具和45 钢小球、硅橡胶模具和有机玻璃( PMMA) 小球、聚四氟乙烯模具和聚四氟乙烯小球为对偶件,对弹性软体( 兔小肠) 不同应力应变状态下的摩擦特性进行研究.以45 钢模具和45 钢小球为对偶件的摩擦试验表明: 小肠平均摩擦系数随径向应变呈类周期性变化,表现为随着径向应变的增加而变大.以柔性材料硅橡胶模具和PMMA 小球为对偶件的摩擦试验表明: 径向应变情况下,随着法向载荷的增加,平均摩擦系数呈增加趋势.以聚四氟乙烯模具和聚四氟乙烯小球为对偶件的摩擦试验表明: 轴向应变情况下,随着法向载荷的增加,平均摩擦系数呈减小趋势.

关键词: 微型机器人, 摩擦特性, 弹性软体, 应力应变状态

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