Project scattering of elastic waves

Solutions of a number of crack diffraction problems which have potential applications in the ultrasonic nondestructive evaluation of structural elements were generated. Only simplified prototype problems were considered so that their solutions could be obtained without recourse to highly elaborate numerical schemes. The emphasis was on obtaining accurate results for idealized geometries which could serve as standards for evaluating numerical or other approximate solutions of more realistic and complex models. Problems considered were: diffraction of normally incident P waves by circular cracks, diffraction of elastic waves by a finite crack within or on a half space, diffraction of body and surface waves at high frequencies by an edge crack in a plate, and the surface response of a layered half space to dislocation sources.