中文摘要：

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．

英文摘要：

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.