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总览 评价 刘铁军 ， 汪越胜 * （ 北京交通大学工程力学研究所； ） 摘要： 研究了功能梯度涂层半空间在球形刚性压头作用下的微动接触问题，其中涂层的材料参数假设以指数形式变化，压头承受单调递增的压力和循环变化的扭矩。利用积分变换将问题归结为一组奇
刘铁军， 汪越胜*
（
北京交通大学工程力学研究所； ）
摘要：
研究了功能梯度涂层半空间在球形刚性压头作用下的微动接触问题，其中涂层的材料参数假设以指数形式变化，压头承受单调递增的压力和循环变化的扭矩。利用积分变换将问题归结为一组奇异积分方程，通过叠代获得数值解。讨论了接触应力的变化，以及涂层梯度对接触力分布的影响。
关键词：
微动接触；功能梯度材料；涂层
Liu Tiejun， Wang Yuesheng*
（
Institute of Engineering Mechanics, Beijing Jiaotong University； ）
Abstract：
This paper is concerned with the fretting problem of a functionally graded coated half-space indented by a rigid sphere under a normal load and a cyclic torque. The shear modulus of the graded coating is assumed to be an exponential function and the Poisson’s ratio is constant. By using Hankel integral transform technique, the contact problem is reduced to a Cauchy singular integral equation. The contact pressures are calculated by solving the equations numerically. The results show that the stick region and angel of rigid rotation depend on the gradient of the functionally graded coating as well as the torque couple. The results also show that the appropriate gradual variation of the shear modulus can significantly alter the contact traction. This may modify the contact damage.
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