Abstract
The electrically pcrmeable slit crack within a piezoelectric body is treated as a bonded interface in electrostatics. The electric boundary conditions along the interface should be the continuity of the tangent component of the electric field strength and the normal component of thc electric displacement. Using such boundary conditions, the problems of antiplane strain of collinear cracks between bonded dissimilar piezoelectric materiala are exactly analyzed. Solutions of the complex potentials in a closed form are given for a single and two interface cracks. It is shown from the solutions that the stress, strain, electric field strength and electric displacement have (1/2) type of singularity at the crack tip, and the energy release rate for crack propagation depends only on both stress intensity factor and strain intensity factor.
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