Elastic-plastic contact modeling of rough surfaces considering material plastic flow
To solve the elastic-plastic contact problem of rough surface,considering the plastic flow of the materials caused by contact de-formation at the top of micro-convex body,starting from the criterion of plastic deformation volume conservation,the adjacent contact ele-ments were divided into different types of contact segments.The plastic flow modes and algorithms of the materials for different contact segments were proposed,respectively,and an elastoplastic contact model with cyclic updating of surface micro-morphology was estab-lished.The effectiveness of the proposed model was verified by comparison with Hertz solution and finite element solution.The elastic-plastic contact analysis of rough surfaces was carried out by the proposed model,and the surface morphology and contact pressure evolution process were obtained.The results show that the proposed model is basically consistent with Hertz solution and finite element solution,and the maximum error is less than 10％.The plastic flow of the materials causes the materials to gradually transfer from the peak to the peak valley,resulting in a larger contact range and a smaller average contact pressure,but the transition speed gradually slows down.
NETL
NSTL
万方数据
维普
