The axisymmetric torsional contact problem of a functionally graded piezoelectric coated half-space |
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Authors: | Jie Su Liao-Liang Ke Yue-Sheng Wang Yang Xiang |
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Institution: | 1. Institute of Engineering Mechanics, Beijing Jiaotong University, Beijing 100044, China;2. School of Computing, Engineering and Mathematics, Western Sydney University, Penrith South, NSW 2751, Australia;Centre for Infrastructure Engineering, Western Sydney University, Penrith South, NSW 2751, Australia |
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Abstract: | In this article, we study the axisymmetric tor-sional contact problem of a half-space coated with func-tionally graded piezoelectric material (FGPM) and subjected to a rigid circular punch. It is found that, along the thick-ness direction, the electromechanical properties of FGPMs change exponentially. We apply the Hankel integral trans-form technique and reduce the problem to a singular integral equation, and then numerically determine the unknown con-tact stress and electric displacement at the contact surface. The results show that the surface contact stress, surface azimuthal displacement, surface electric displacement, and inner electromechanical field are obviously dependent on the gradient index of the FGPM coating. It is found that we can adjust the gradient index of the FGPM coating to modify the distributions of the electric displacement and contact stress. |
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Keywords: | Axisymmetric torsional contact Singular integral equation Functionally graded piezoelectric materials (FGPMs) |
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