Crack tip energy release rate for a piezoelectric compact tension specimen
Crack tip energy release rate for a piezoelectric compact tension specimen
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DOI：
10.1016/s0013-7944(99)00068-5
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发表时间：
1999-09
影响因子：
5.4
通讯作者：
R. McMeeking
中科院分区：
文献类型：
--
作者：
R. McMeeking
根据压电材料的弹性和介电特性，总结了脆性压电材料的理论断裂力学。在这种方法中考虑了电场和机械载荷的影响，并使用Griffith能量平衡来建立相关的能量释放率。有限元结果给出了一个紧凑的拉伸试样具有一致的压电材料PZT-4的属性。考虑了裂纹张开位移对裂纹附近电场的影响。由Park和Sun获得的由PZT-4组成的紧凑拉伸试样中的断裂行为的观察结果（J.Amer.Ceram. 1995;78：1475-1480）被用于评估理论结果的相关性。
A theoretical fracture mechanics for brittle piezoelectric materials is summarized consistent with standard features of elasticity and dielectricity. The influence of electric field and mechanical loading is considered in this approach and a Griffith style energy balance is used to establish the relevant energy release rates. Finite element results are given for a compact tension specimen having properties consistent with the piezoelectric material PZT-4. The influence of the crack opening displacement on the electric field adjacent to the crack is considered. Observations of fracture behavior in a compact tension specimen composed of PZT-4 obtained by Park and Sun (J. Amer. Ceram. Soc. 1995;78:1475–1480) are used to assess the relevance of the theoretical results.