2212 自由表面に平行なき裂を有する傾斜機能圧電セラミックス厚板の電気熱弾性応答(S14-3 材料の傾斜機能性と圧電特性への取り組み,S14 先進材料の材料特性における弾性数理解析の新たな取り組み)

概要

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In this paper, the mixed-mode thermoelectromechanical fracture problem for a functionally graded piezoelectric material (FGPM) strip is considered. It is assumed that the thermoelectroelastic properties of the strip vary continuously along the thickness of the strip, and that the strip is under the thermal load. The crack faces are supposed to be insulated thermally and electrically. By using the Fourier transform, the thermal and electromechanical problems are reduced to a singular integral equation and a system of singular integral equations, respectively, which are solved numericaly. Numerical calculations are carried out, and detailed results are presented to illustrate the influence of the crack length, the crack location and the material nonhomogeneity on the stress and electric displacement intensiy factors. The temperature-stress distributions are also presented. The normalized intensity factors are under the great influence of the geometric parameters. The effect of the material nonhomogeneity on the intensity factors depends on the geometric parameters.
2007-09-07