Scattering problems in cracked piezoelectric plane are studied. The solution is based on boundary integral equation (BIE) representation of the scattered field in the frequency domain. The asymptotic of the fundamental solution and its derivatives in the far field are derived using the stationary phase method. Stress intensity factors (SIF) near the crack edge are determined uniquely by far field data. Numerical examples show the comparison between the identified and actual SIF. , where U is the density. The boundary conditions are: 3 0, * t 4 in sc J J J u u u and V V V in sc J J J . Here in J u and V in J are the displacement and stress of the incident wave field and sc J u and V sc J are the displacement and stress of the scattered by the crack wave field.We will solve the boundary value problem (3), (4), (5) using the boundary integral equation method (BIEM). Following Wang and Zhang [10] for the piezoelectric case we obtain the BIE:
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