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．

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.