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Title: Micromechanics models for the effective nonlinear electro-mechanical responses of piezoelectric composites
Authors: Chien-Hong Lin;Anastasia Muliana
Contributors: 國立臺灣海洋大學:機械與機電工學系
Date: 2013-07
Issue Date: 2017-02-14T06:56:25Z
Publisher: Acta Mechanica
Abstract: 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.
Relation: 224(7),pp.1471-1492
Appears in Collections:[Department of Mechanical and Mechatronic Engineering] Periodical Articles

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