MOVING SEMI-INFINITE MODE-Ⅲ CRACK INSIDE THE SEMI-INFINITE ELASTIC MEDIA

摘要

The problem of a semi-infinite moving mode-III crack inside a semi-infinite isotropic half-space is considered. The crack is located between a semi-infinite elastic medium and a layer whose distance from the surface to crack depth is h. Initially, Fourier transformation and inverse Fourier transformation are applied to transfer the governing boundary value problem to the well-known Wiener-Hopf equation. The purpose of this problem is to obtain the analytical solution of Stress Intensity Factor (SIF) and Crack Opening Displacement (COD) at the neighbourhood of the crack tip. In numerical Section, I have discussed the variation of parameters (crack velocity, layer distance h from the surface to crack depth) to show the effect of these parametric values on the graphs of SW and COD where the material properties (density, shear modulus) were fixed.