Thermopiezoelectric interaction of macro- and micro-cracks in piezoelectric medium

摘要

Considered is the interaction of macro- and micro-cracks in an anisotropic piezoelectric solid. The Green's function and principle of superposition are used to formulate a system of singular integral equations for solving the unknown temperature discontinuity and elastic displacement-electric potential. The residual heat flux, stress and electric displacement on the microcrack are evaluated directly from the near-tip field of main crack. Numerical results for stress and electric displacement intensity factors in a three-crack system are obtained to illustrate the application of the method.