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Polarization switching responses of 1-3 and 0-3 active composites

机译：1-3和0-3活性复合材料的极化转换响应

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This study presents simplified micromechanical models for estimating the overall polarization switching hysteretic responses of active composites comprising of ferroelectric ceramics (active constituent) and inactive constituent. A nonlinear rate-dependent constitutive model for describing hysteretic polarization and butterfly strain responses is used for the ferroelectric constituent, while the inactive constituent is assumed to experience elastic or viscoelastic response. Two unit-cell models with four and eight sub-cells are considered to determine the overall responses of 1-3 and 0-3 active composites, respectively. Linearized micromechanical relations are used to provide trial values of the overall electro-mechanical responses, and a fixed point iterative method is then used in order to correct errors from linearizing the nonlinear responses. The micromechanical predictions of 1-3 active composites are validated with experimental data available in literature. Parametric studies are conducted to illustrate the effects of microstructural geometries and volume contents of the ferroelectric inhomogeneity as well as loading history on the overall hysteretic responses of active composites.
机译：这项研究提出了简化的微机械模型，用于估算由铁电陶瓷（活性成分）和非活性成分组成的活性复合材料的整体极化转换滞后响应。用于描述磁滞极化和蝶形应变响应的非线性速率相关本构模型用于铁电构件，而假定非活动构件经历弹性或粘弹性响应。考虑使用具有四个和八个子电池的两个单位模型来分别确定1-3和0-3活性复合材料的总体响应。线性化的微机械关系用于提供整体机电响应的试验值，然后使用定点迭代法来校正非线性化线性响应中的误差。 1-3种活性复合材料的微机械预测已通过文献中提供的实验数据得到验证。进行了参数研究，以说明微观结构几何形状和铁电不均匀性的体积含量以及负载历史对活性复合材料整体滞后响应的影响。

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