Open Access

ARTICLE

Interfaces Between two Dissimilar Elastic Materials

Chyanbin Hwu¹, T.L. Kuo, Y.C. Chen
1 Institute of Aeronautics and Astronautics, National Cheng Kung University, Tainan, Taiwan,R.O.C. Tel: 886-6-2757575 ext.63662; Fax: 886-6-2389940; E-mail: CHwu@mail.ncku.edu.tw

Computers, Materials & Continua 2009, 11(3), 165-184. https://doi.org/10.3970/cmc.2009.011.165

Abstract

In this paper the near tip solutions for interface corners written in terms of the stress intensity factors are presented in a unified expression. This single expression is applicable for any kinds of interface corners including corners and cracks in homogeneous materials as well as interface corners and interface cracks lying between two dissimilar materials, in which the materials can be any kinds of linear elastic anisotropic materials or piezoelectric materials. Through this unified expression of near tip solutions, the singular orders of stresses and their associated stress/electric intensity factors for different kinds of interface problems can be determined through the same formulae and solution techniques. This unified feature of solving interface problems is then implemented numerically through several different interface problems. Moreover, in order to improve the accuracy and efficiency of numerical computation, a special boundary element based upon the Green's function of bimaterials is introduced in this paper.

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Keywords

interface cracks, interface corners, singular orders of stresses, stress intensity factors, anisotropic materials, piezoelectric materials, finite element method, boundary element method

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