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题名: Micromechanics models for the effective nonlinear electro-mechanical responses of piezoelectric composites
作者: Chien-Hong Lin;Anastasia Muliana
贡献者: 國立臺灣海洋大學:機械與機電工學系
日期: 2013-07
上传时间: 2017-02-14T06:56:25Z
出版者: Acta Mechanica
摘要: Abstract:The nonlinear behavior of piezoelectric composites becomes prominent when the composites are subjected to high electric fields, which is often the case in actuator applications. Understanding the nonlinear behavior of piezoelectric composites is crucial in designing structures comprising of these materials. This study presents micromechanics models for predicting nonlinear electro-mechanical responses of polarized piezoelectric composites, comprising of a linear non-piezoelectric homogeneous medium (matrix) reinforced by either nonlinear piezoelectric fibers or particles, subjected to high electric fields. The maximum electric field applied is within the coercive electric field limit. The constitutive relations for the polarized piezoelectric inclusions consist of the third- and fourth-order electro-mechanical coupling tensors and the second- and third-order electric permeability tensors. The Mori–Tanaka micromechanics and simplified unit-cell micromechanics models are formulated to predict the effective nonlinear electro-mechanical responses of piezoelectric fiber reinforced and particle reinforced composites, respectively. Linearized micromechanical relations are first used to provide trial solutions followed by iterative schemes in order to correct errors from linearizing the nonlinear responses. Numerical results are presented to illustrate the performance of each micromechanics model.
關聯: 224(7),pp.1471-1492
显示于类别:[機械與機電工程學系] 期刊論文


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