Fig. 4.
From: Simulations of P-SV wave scattering due to cracks by the 2-D finite difference method
Displacement discontinuity along an isolated crack due to a parallel incidence of harmonic P or SV waves: (a) normal displacement discontinuity due to P waves, and (b) shear displacement discontinuity due to SV waves. The abscissas represent the positions relative to the center of the crack. The rightward arrows indicate the direction of wave propagation relative to the crack plane. The curve parameters denote ka. The solid and dashed lines indicate the calculations based on the present FDM and the BIEM of Kawahara and Yamashita (1992), respectively.