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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41329

Title: Micromechanical models for the effective time-dependent and nonlinear electromechanical 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: 2013-09
Issue Date: 2017-02-14T06:45:59Z
Publisher: Journal of Intelligent Material Systems and Structures
Abstract: Abstract:This study introduces micromechanical models for analyzing the overall electromechanical responses of piezoelectric composites comprising polarized piezoelectric ceramics and polymeric constituents. The polarized piezoelectric ceramics can experience nonlinear electromechanical responses due to an application of large electric fields, while the polymer exhibits viscoelastic response. Thus, the piezoelectric composites can experience significant time-dependent and nonlinear electromechanical coupling behaviors. Two micromechanical models are considered: the Mori–Tanaka and unit-cell models. Linearized micromechanical relations are first defined for obtaining the overall responses of the piezoelectric composites followed by iterative schemes in order to correct errors from linearizing the nonlinear responses. Numerical results are presented for two composite systems, that is, piezoelectric unidirectional fiber with circular/square cross section and spherical/cubic particle inhomogeneities embedded in a polymeric matrix. The linear electromechanical responses from the two micromechanical models are compared with the experimental data available in the literature. Parametric studies are performed in order to examine the effect of inhomogeneity geometry and compositions and prescribed boundary conditions on the overall time-dependent and nonlinear electromechanical responses of the composites.
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41329
Appears in Collections:[機械與機電工程學系] 期刊論文

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