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Analysis of piezoelectric fracture under combined mechanical and electrical loading based on meshless method

机译：基于无网格法的机电联合载荷下的压电断裂分析

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摘要

In this paper, the moving least-square (MLS) method, one of the most promising meshless methods, is modified to construct whole field meshless approximation for coupled electromechanical problems. Based on this method, the crack propagation behavior and the elasto-electric fields near a crack tip in a PZT-5H piezoelectric ceramic under mechanical, electrical and mechanical-electrical mixed loads are investigated. The numerical results show that for a negative applied electric field, the hoop stress will be maximum at a certain angle other than 0~0 when the ratio of the electric field to tensile stress is relatively high, which makes the crack turn away from its original growth path.
机译：在本文中，移动最小二乘（MLS）方法是最有前途的无网格方法之一，经过修改后，它可以构造用于耦合机电问题的全场无网格近似。基于这种方法，研究了在机械，电气和机械-电气混合载荷下PZT-5H压电陶瓷的裂纹扩展行为和裂纹尖端附近的弹性电场。数值结果表明，在电场为负的情况下，当电场与拉应力之比较高时，环向应力在0°至0°以外的某个角度处最大。成长之路。

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