Three-dimensional exact solutions of elastic transversely isotropic coated structures under conical contact

Abstract

Abstract Due to the strong reduction of the coating thickness and to the large stress gradient that may occur in coated structures, it is hard to guarantee the calculation accuracy in the design of coated structures by the commercial software. In this case, an accurate and efficient calculation method for researching the coated structure is valuable. It will contribute to the accurate design and quality promotion of coated structures. In this paper, the 3D solutions of elastic transversely isotropic coated structure under conical contact are derived based on the general solutions of the elastic transversely isotropic material. The solutions are derived in two cases including the normal contact load and the tangential contact load. The numerical results present that this method presents good convergence, high efficiency and stability. Based on this method, the optimal thickness of the coating and the interfacial stress can be obtained accurately. Because the interfacial stress can lead to the debonding failure of coated structures, a method for predicting interface security state with evaluation criterion for interfacial failure is proposed. The corresponding analysis will contribute to the strengthening design of the coated structure.