Dislocation inside a piezoelectric media with an elliptic inhomogeneity

In this paper. Green functions for an infinite piezoelectric media with an elliptic piezoelectric inhomogeneity are given for a generalized electro-me chanical force and a generalized electro-mechanical line dislocation that m ay be located outside, inside or on the interface of elliptic boundary of i nhomogeneity. Expressions of Green functions are identical when the general ized force and the generalized dislocation approach to the elliptic boundar y from points outside or inside the inhomogeneity. The interaction electric enthalpy between the inhomogeneity and the dislocation is given, which can be used to find the interaction force on the dislocation owing to the exis tence of the inhomogeneity. Numerical illustrations for the interaction for ces are also given and some discussions on the effects of the material mism atches on the interaction forces are made. (C) 2001 Elsevier Science Ltd. A ll rights reserved.