Screw Dislocation Interacting with an Interfacial Edge Crack between Two Bonded Dissimilar Piezoelectric Wedges

Authors

Xiangfa Wu, University of Nebraska-LincolnFollow
Yuris A. Dzenis, University of Nebraska-LincolnFollow
Wen-Sheng Zou, Beijing Institute of Technology

Date of this Version

10-12-2002

Comments

Published in International Journal of Fracture 117:3 (October 2002), pp. L9–L14. Copyright © 2002 Kluwer Academic Publishers. Used by permission. http://www.springerlink.com/openurl.asp?genre=journal&issn=0376-9429

Abstract

This letter is concerned with an interface edge crack interacting with a screw dislocation under antiplane mechanical and in-plane electric loading in a piezoelectric bimaterial wedge. In addition with a discontinuous electric potential across the slip plane, the dislocation is subjected to a line-force and a line-charge at the core. The out-of-plane displacement and electric potentials are obtained in closed-form on the basis of the conformal mapping technique and the solution for a screw dislocation in an infinite piezoelectric bimaterial with a semi-infinite interface crack. The intensity factors (IFs) and energy release rate (ERR) are obtained explicitly.