接触应力分布对工作表面破坏情况有着重要的影响。为分析磨损表面破坏情况，文中利用有限元法分析了三维滑块摩擦模型的面接触应力从静态到滑动的演化过程，并对平面应力的光弹实验进行比较研究。仿真得到了主应力差分布、表面接触压力
分布和摩擦应力分布，分析结果表明: 随着接触状态的改变，接触应力从集中在滑块边缘周围变成集中在运动方向前缘; 载荷及摩擦系数对接触应力的影响较显著。平面应力场的光弹实验结果表明，接触应力集中在运动前方，与仿真结果一致。表面磨损实验结果表明: 开始接触磨损时，滑块前缘出现最大损伤，对应的接触应力最大; 随着磨损距离的增加，接触表面损伤由运动前方向后扩展，最后覆盖整个接触面; 接触面所受的载荷越大，磨损程度越高。

The contact stress distribution significantly influences the working surface damage． In order to analyze the wear surface damage，the finite element method was used to analyze the evolution process of surface contact stress of three-dimensional slider friction model from static state to sliding state，and comparative study on the plane stress photoelasticity experiments were carried out． By simulation analysis，the distribution of principal stress diffe-rence，contact pressure and frictional stress were obtained． Simulation results show that along with the contact state changes，the contact stresses firstly concentrate on the edges of slider and then concentrate on the front edge of the motion; the influences of load and friction coefficient on contact stresses are significant． The photoelasticity experi-mental results of plane stress field show that the contact stresses is concentrated in front of the movement，which is consistent with the simulation results． The results of abrasion experiment show that when the wear begins，the front edge of the slider shows the biggest damage and the maximum contact stress; as the wear distance increases，the damage of contact surface expands from the front to the back，and finally covers the whole contact surface; the lar-ger load on the contact surface，the higher wear degree．