| WAVE PROPAGATION IN ELECTROSTRICTIVE MATERIALS UNDER BIASED FIELDS |
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| 作者姓名： | HuYuantai YangJiashi JiangQing |
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| 作者单位： | Hu Yuantai (Department of Mechanics，Huazhong University of Science and Technology，Wuhan 430074，China) Yang Jiashi (Department of Engineering Mechanics，University of Nebraska，Lincoln，NE 68588，USA) Jiang Qing (Department of Mechanical Engineering，University of California，Riverside，CA 92521，USA) |
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| 摘 要： | I. INTRODUCTION Di?erent from piezoelectricity which is a linear coupling between mechanical and electric ?elds andcan only exist in anisotropic materials1], electrostriction refers to the quadratic dependence of strainor stress on electric ?elds2,3] …
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| 关 键 词： | 电致伸缩材料 声波 附加场 偏压场 各向异性材料 |
| 收稿时间： | 7 July 2003 |
Wave Propagation in Electrostrictive Materials under Biased Fields |
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| HuYuantai YangJiashi JiangQing.WAVE PROPAGATION IN ELECTROSTRICTIVE MATERIALS UNDER BIASED FIELDS[J].Acta Mechanica Solida Sinica,2004,17(3):209-217. |
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| Authors: | Hu Yuantai Yang Jiashi and Jiang Qing |
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| Institution: | (1) Department of Mechanics, Huazhong University of Science and Technology, 430074 Wuhan, China;(2) Department of Engineering Mechanics, University of Nebraska, 68588 Lincoln, NE, USA;(3) epartment of Mechanical Engineering, University of California, 92521 Riverside, CA, USA |
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| Abstract: | Constitutive relations for nonlinear, isotropic, electroelastic solids quadratic in the ?nite strain tensor and the referential electric ?eld are derived from the full nonlinearity theory of electroelasticity by tensor invariants, which can describe the behavior of electrostrictive ma- terials. The equations are linearized for small, dynamic ?elds superposed on ?nite, static biased ?elds. These linear equations are used to study plane waves propagating in an electroelastic body under various mechanical and/or electric biased ?elds. It is shown that the speed of the acoustic waves exhibits a strong dependence upon those material parameters in the nonlinear constitu- tive relations. Experimental determination of these material parameters using this dependence is discussed. |
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| Keywords: | electrostrictive materials biased ?elds incremental ?elds acoustic waves |
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