Crack path selection in piezoelectric bimaterials
نویسندگان
چکیده
The problem of crack path selection in piezoelectric bimaterials is considered in this paper. Based on the Stroh formulation for anisotropic material and GreenÕs functions for piezoelectric bimaterials, the crack problem is expressed in terms of coupled singular integral equations at ®rst, and then the equations are used to solve for stress and electric displacement ®elds numerically. A crack impinging an interface joining two dissimilar materials may arrest or may advance by either penetrating the interface or de ̄ecting into it. The competition between de ̄ection and penetration is investigated using the maximum energy release rate criterion. Numerical results are presented to study the role of remote electroelastic loads on the path selection of crack extension. Ó 2000 Elsevier Science Ltd. All rights reserved.
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