Abstract
The focus of this paper is centered on diffraction of P-wave by a Griffith crack in an infinite isotropic elastic medium on which impact load is applied. Suddenly applied equal but opposite normal stresses on crack faces causes the separation of the crack faces. Laplace and Fourier transforms have been employed to convert the problem to a Fredholm integral equation of second kind in the Laplace transform plane which has been solved by perturbation method. Stress intensity factor has been computed numerically by Laplace inversion using Zakian’s algorithm and plotted graphically against time for different isotropic materials.
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