Study on contact performance of coating based on meshless method

A contact mechanics model for surface textured coating was developed, which was numerically solved based on the combination of meshless theory and linear programming method. The influences of coating material, thickness and surface texture on the contact pressure and the stress state of coating-substrate system were investigated. The results demonstrate that the stress gradient at the interface of coating and substrate along symmetry axis increases with the increasing of the elastic modulus ratio of coating and substrate. As the coating thickness increases, the stress gradient at the interface increases first and then decreases. Elastic modulus ratio and coating thickness also have great influences on the shear stress and the Mises stress at the interface. Moreover, the maximum Mises stress within coating and substrate can be reduced by decreasing the distance between each surface texture.