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Basic solution of two parallel mode-I permeable cracks in functionally graded piezoelectric materials

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Abstract

The basic solution of two parallel mode-I permeable cracks in functionally graded piezoelectric materials was studied in this paper using the generalized Almansi’s theorem. To make the analysis tractable, it was assumed that the shear modulus varies exponentially along the horizontal axis parallel to the crack. The problem was formulated through a Fourier transform into two pairs of dual integral equations, in which unknown variables are jumps of displacements across the crack surface. To solve the dual integral equations, the jumps of displacements across the crack surfaces were directly expanded as a series of Jacobi polynomials. The solution of the present paper shows that the singular stresses and the singular electric displacements at the crack tips in functionally graded piezoelectric materials carry the same forms as those in homogeneous piezoelectric materials; however, the magnitudes of intensity factors depend on the gradient of functionally graded piezoelectric material properties. It was also revealed that the crack shielding effect is also present in functionally graded piezoelectric materials.

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Authors and Affiliations

  1. Center for Composite Materials and Structures, Harbin Institute of Technology, P. O. Box 3010, No.2, Yikuang Street, Harbin, 150080, People’s Republic of China

    Pei-Wei Zhang & Zhen-Gong Zhou

  2. Department of Mechanical Engineering, University of New Brunswick Fredericton, New Brunswick, Canada, E3B 5A3

    Zeng-Tao Chen

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  1. Pei-Wei Zhang
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  2. Zhen-Gong Zhou
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Correspondence to Zhen-Gong Zhou.

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Zhang, PW., Zhou, ZG. & Chen, ZT. Basic solution of two parallel mode-I permeable cracks in functionally graded piezoelectric materials. Arch Appl Mech 78, 411–430 (2008). https://doi.org/10.1007/s00419-007-0170-9

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