Three-Dimensional Finite Element Analysis of Surface Deformation and Stresses in an Elastic-Plastic Layered Medium Subjected to Indentation and Sliding Contact Loading
Three-Dimensional Finite Element Analysis of Surface Deformation and Stresses in an Elastic-Plastic Layered Medium Subjected to Indentation and Sliding Contact Loading
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DOI：
10.1115/1.2788874
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发表时间：
1996-06
期刊：
影响因子：
--
通讯作者：
E. Kral;K. Komvopoulos
中科院分区：
文献类型：
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作者：
E. Kral;K. Komvopoulos
本文对刚性球体在具有较硬刚性层的半空间上的压入和滑动进行了三维有限元模拟。球体通过接触单元建模，从而避免了对压力分布的先验假设。在100和200倍于基底材料的初始屈服载荷的法向载荷下进行压痕，随后在恒定法向载荷下进行滑动，达到大约两倍于压痕接触半径的距离。在选定的情况下进行两个完整的负载循环，以评估重复滑动对表面位移和接触应力的影响。层材料的性能，界面摩擦，和正常的负载上的滑动和残余接触应力和前向塑性流动的影响进行检查。重点是在表面的滑动和残余拉应力，以评估裂纹萌生和随后的故障作为层材料的性能，摩擦系数和正常负载的函数的后果。有限元计算结果与理论分析和实验研究结果吻合较好。
Three-dimensional finite element simulations of the indentation and sliding ofa rigid sphere on a half-space with a harder and stiffer layer are presented. The sphere is modeled by contact elements, thereby avoiding a priori assumptions for the pressure profile. Indentations are performed to normal loads of 100 and 200 times the initial yield load of the substrate material and subsequent sliding is performed at a constant normal load to distances of approximately twice the indentation contact radius. Two complete load cycles are performed in selected cases to assess the effect of repeated sliding on the surface displacements and contact stresses. The effects of layer material properties, interface friction, and normal load on the sliding and residual contact stresses and forward plastic flow are examined. Emphasis is given to the sliding and residual tensile stresses at the surface in order to assess the consequences for crack initiation and subsequent failure as a function of the layer material properties, the coefficient offriction, and normal load. The finite element results are shown to be in good agreement with the results of analytical and experimental studies.