Coupled solution for anisotropic piezoelectric materials with cracks |
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Authors: | Hou Mishan |
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Institution: | (1) Department of Mechanical Engineering, University of Petroleum, 257062 Dongying, China |
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Abstract: | The coupled elastic and electric fields for anisotropic piezoelectric materials with electrically permeable cracks are analyzed
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 along the faces of cracks are all constants, and the
electric field intensity and electric 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 intensity
and electric displacement inside electrically permeable cracks are all constants. |
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Keywords: | piezoelectric material crack stress intensity factor energy release rate |
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