点击次数：

论文类型：期刊论文

发表时间：2012-08-01

发表刊物：FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES

收录刊物：SCIE、EI、Scopus

卷号：35

期号：8,SI

页面范围：742-766

ISSN号：8756-758X

关键字：boundary element method; dynamic stress intensity factors; functionally graded materials; Laplace transform; radial integration method; thermal shock

摘要：In this paper, transient thermoelastic crack analysis in two-dimensional, isotropic, continuously non-homogeneous and linear elastic functionally graded materials subjected to a thermal shock is presented. The Laplace transform technique is used to eliminate the time dependence of the governing equations of the linear coupled thermoelasticity. Fundamental solutions for isotropic, homogeneous and linear elastic solids in the Laplace-transformed domain are applied to derive boundarydomain integral equations for the mechanical and thermal fields. The radial integration method is employed to transform the domain integrals into the boundary integrals. A collocation-based boundary element method is implemented for the spatial discretization of the boundarydomain integral equations. The time-dependent numerical solutions are obtained by using Stehfest's inversion algorithm. Numerical results are presented and discussed to show the influences of the material gradation, the thermo-mechanical coupling, the crack orientation and the thermal shock loading on the dynamic stress intensity factors.