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The coupled elastic and electric fields for anisotropic piezoelectric materials with electri-cally permeable cracks are analyzed by using Stroh formula in anisotropic elasticity.It is shown fromthe solution that the tangent component of the electric field strength and the normal component of theelectric displacement along the faces of cracks are aU constants,and the electric field intensity and elec-tric displacement have the singularity of type(1/2)at the crack tip.The energy release rate for crackpropagation depends on both the stress intensity factor and material constants.The electric field inten-sity and electric displacement inside electrically permeable cracks are all constants.
The coupled elastic and electric fields for anisotropic piezoelectric materials with electri-cally permeable cracks are used by using Stroh formula in anisotropic elasticity. It is shown from the solution that the tangent component of the electric field strength and the normal component of the electric displacement of cracks are a constants, and the electric field intensity and elec-tric displacement have the singularity of type (1/2) at the crack tip. the energy release rate for crack propagation depends on both the stress intensity factor and material constants. the electric field inten-sity and electric displacement inside electrically permeable cracks are all constants.