A phase-field model for fracture in piezoelectric ceramics
A phase-field model for fracture in piezoelectric ceramics
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DOI：
10.1007/s10704-013-9881-9
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发表时间：
2013-10
影响因子：
2.5
通讯作者：
Zachary A. Wilson;Michael J. Borden;C. Landis
中科院分区：
文献类型：
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作者：
Zachary A. Wilson;Michael J. Borden;C. Landis
提出了一种用于模拟压电陶瓷断裂的相场模型。描述了几种不同的裂纹面边界条件的实现，包括传导、可渗透、绝缘或不渗透，以及能量一致性。后一种方法涉及到压电性的有限变形框架。此外，还提出了一种新的控制材料退化的函数，以消除在大电场附近存在的高相场值。新的功能被发现也导致了脆性材料行为的改善。结果表明，该模型能够很好地捕捉压电体断裂过程中产生的复杂现象，包括裂纹滞后、加速和转向。
A phase-field model is presented for modeling the fracture of piezoelectric ceramics. The implementation of several different crack face boundary conditions, including conducting, permeable, and insulating or impermeable, as well as energetically consistent is described. The approach to the latter involves a finite deformation framework for piezoelectricity. In addition, a new function that governs material degradation is proposed to eliminate the presence of high phase-field values in the vicinity of large electric fields. The new function is found to lead to improved brittle material behavior as well. Results are presented that demonstrate the capability of the model to capture complicated phenemona that arise in piezoelectric fracture, including crack retardation, acceleration, and turning.