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Continuum damage model for ferroelectric materials and its application to multilayer actuators

机译:铁电材料的连续损伤模型及其在多层执行器中的应用

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摘要

In this paper a micromechanical continuum damage model for ferroelectric materials is presented. As a constitutive law it is implemented into a finite element (FE) code. The model is based on micromechanical considerations of domain switching and its interaction with microcrack growth and coalescence. A FE analysis of a multilayer actuator is performed, showing the initiation of damage zones at the electrode tips during the poling process. Further, the influence of mechanical pre-stressing on damage evolution and actuating properties is investigated. The results provided in this work give useful information on the damage of advanced piezoelectric devices and their optimization.
机译:本文提出了铁电材料的微机械连续损伤模型。作为本构法,它被实现为有限元(FE)代码。该模型基于域切换及其与微裂纹增长和合并的相互作用的微观力学考虑。进行了多层执行器的有限元分析,显示了极化过程中电极尖端的损坏区域的开始。此外,研究了机械预应力对损伤演变和致动性能的影响。这项工作提供的结果提供了有关先进压电设备的损坏及其优化的有用信息。

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