超弹TiNi形状记忆合金滑动接触机敏摩擦学特性的有限元分析

FINITE ELEMENT ANALYSIS OFSMART TRIBOLOGICAL PROPERTYOF PSEUDOELASTIC TINI SHAPEMEMORY ALLOY UNDERSLIDING CONTACT

通过用有限元法对具有超弹性的TiNi形状记忆合金的滑动接触摩擦过程进行模拟,发现在屈服极限和载荷一定时,产生的最大Von mises应力随着弹性模量的增加而增加;产生的最大Von mises弹性应变随着弹性模量的增加而减少;产生的最大Von mises塑性应变随着弹性模量的增加而增加。并把所得结论与TiNi形状记忆合金的机敏摩擦学特性相联系,认为该合金的机敏摩擦学特性是其具有良好耐磨性的原因。

By using the finite element method to simulate the sliding contact process of TiNi shape memory alloys with pseu-doelasticity, it has been found that under the same yield limit and same load, the maximum Von Mises stresse created beyond the surface of TiNi alloys increases with the increasing Young modulus and the maximum Von Mises plastic strain has the same law, but the maximum Von Mises elastic strain behaves a converse tendency. Connecting the results with the smart tribological property of TiNi shape memory alloys, it is considered that the smart tribological property is the reason why TiNi shape memory alloys possesse high wear resistance .