Continuum damage model for ferroelectric materials and its application to multilayer actuators
Continuum damage model for ferroelectric materials and its application to multilayer actuators
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DOI：
10.1088/0964-1726/25/5/055045
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发表时间：
2016-04
影响因子：
4.1
通讯作者：
R. Gellmann;A. Ricoeur
中科院分区：
文献类型：
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作者：
R. Gellmann;A. Ricoeur
本文提出了一个铁电材料的细观连续损伤模型。作为一个本构律，它被实施到有限元（FE）代码。该模型是基于微观力学的考虑域切换及其相互作用与微裂纹的生长和合并。有限元分析的多层致动器进行，显示在极化过程中的电极尖端的损伤区的启动。进一步研究了机械预应力对损伤演化和驱动性能的影响。在这项工作中提供的结果提供了有用的信息，先进的压电器件的损伤和优化。
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.