A SIMPLE CONSTITUTIVE MODEL FOR FERROELECTRIC CERAMICS UNDER ELECTRICAL/MECHANICAL LOADING

A simple phenomenological model is developed for describing the macroscopic constitutive response of ferroelectric materials based on consideration of the fact that domain switching is a progressive evolution process with loading. The volume fraction of domain switching is taken as an internal varia...

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Bibliographic Details
Published in:Acta mechanica solida Sinica 2007-03, Vol.20 (1), p.1-12
Main Authors: Li, Yu, Shouwen, Yu, Xiqiao, Feng
Format: Article
Language:English
Subjects:
constitutive laws
electromechanical coupling
ferroelectrics
gradual domain switching
力学加载
本构模型
电学加载
铁电陶瓷材料
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Summary:A simple phenomenological model is developed for describing the macroscopic constitutive response of ferroelectric materials based on consideration of the fact that domain switching is a progressive evolution process with loading. The volume fraction of domain switching is taken as an internal variable, which is derived from the domain nucleation theory. The proposed theory can simulate the dielectric hysteresis, reversed butterfly hysteresis, nonlinear strain-stress hysteresis, as well as electric displacement-stress relation of ferroelectric materials. Its compaxison with experimental results and two other theoretical models reveals that the model presented can well predict the nonlinear hysteresis of ferroelectrics under electrical or mechanical loading.
ISSN:0894-9166
1860-2134
DOI:10.1007/s10338-007-0701-5