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A Nonlinear Constitutive Theory for Ferroelectrics

机译:铁电非线性本构理论

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摘要

There have been reported many phenomenological theories on the polarization switching of ferroelectric materials, but the achievements have not yet been widely applied to the field of constitutive behaviors of ferroelectrics. In this paper, we develop a constitutive model that is based on the phenomenological theory similar to the work of Y. Ishibashi et al (1997). The constitutive relations are derived from micromechanics theories, and the evolution of volume fraction of domains are determined by the phenomenological theory. By using these equations, we can predict the nonlinear constitutive behavior of ferroelectric ceramics in an easy way. The numerical calculation agree well with the experiment data.
机译:关于铁电材料的极化转换的许多现象学理论已有报道,但这些成果尚未广泛地应用于铁电材料的本构行为领域。在本文中,我们开发了一个基于现象学理论的本构模型,类似于Y. Ishibashi等人(1997)的工作。本构关系是从微观力学理论推导而来的,畴的体积分数的演化是由现象学理论确定的。通过使用这些方程式,我们可以轻松地预测铁电陶瓷的非线性本构行为。数值计算与实验数据吻合良好。

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