DYNAMIC ANTIPLANE SHEAR OF A CRACKED PIEZOELECTRIC CERAMIC

The dynamic theory of antiplane piezoelectricity is applied to solve t he problem of a line crack subjected to horizontally polarized shear w aves in an arbitrary direction. The problem is formulated by means of integral transforms and reduced to the solution of a Fredholm integral equation of the second kind. The path-independent integral G is exten ded here to include piezoelectric effects, and is evaluated at the cra ck tip to obtain the dynamic energy release rate. Numerical calculatio ns are carried out for the dynamic stress intensity factor and energy release rate. The material is piezoelectric ceramic. (C) 1998 Elsevier Science Ltd. All rights reserved.