円板状き裂を有する傾斜機能圧電厚板の電気熱弾性応答

概要

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In this paper, the mixed-mode thermoelectromechanical fracture problem for a functionally graded piezoelectric material (FGPM) strip with a penny-shaped crack 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 thermoelectric loadings. The crack faces are supposed to be insulated thermally and electrically. By using the Hankel transform, the thermal and electromechanical problems are reduced to a singular integral equation and a system of singular integral equations, respectively. Numerical calculations are carried out, and detailed results are presented to illustrate the influence of the crack size, the crack location and the material nonhomogeneity on the stress and electric displacement intensity factors. It can be found that the normalized intensity factors are under the great influence of the geometric parameters and the effect of the material nonhomogeneity on the intensity factors depends on the geometric parameters.
2007-04-25