2042 異種接合半無限体中の三次元界面き裂の応力拡大係数について(G03-6 応力拡大係数,G03 材料力学)

概要

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In this paper, stress intensity factor for a three dimensional planar interfacial crack is considered on the idea of the body force method The formulation leads to a system of singular integral equation, whose unknowns are three types of crack opening displacements. The unknown body force densities are approximated by the products of the fundamental density functions and power series; here, the fundamental density functions are chosen to express singular behavior at the interface crack front exactly. The calculation shows that the present method gives rapidly converging numerical solutions. It is found that the stress intensity factors K_I and K_<II> are determined by bimaterials constant ε alone, independent of elastic modulus ratio and Poisson's ratio.
2007-09-07