Electric Delayed Fracture and Localized Polarization Switching of Cracked Piezoelectric Ceramics in Three-point Bending
Electric Delayed Fracture and Localized Polarization Switching of Cracked Piezoelectric Ceramics in Three-point Bending
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DOI：
10.1177/1056789509103642
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发表时间：
2010-04
影响因子：
4.2
通讯作者：
F. Narita;Y. Shindo;Mitsuru Hirama
中科院分区：
文献类型：
--
作者：
F. Narita;Y. Shindo;Mitsuru Hirama
本文讨论了三点弯曲压电陶瓷在机电载荷作用下的延迟断裂和裂纹尖端附近的局部极化反转。本文用有限元法研究了单边预裂纹梁法的延迟断裂实验。采用非线性有限元分析方法计算了渗透性、非渗透性和开放裂缝面边界条件下的断裂力学参数，如能量释放率。最近提出的大力一致的边界条件也被认为是。然后研究了外加电场和局部极化转换对断裂力学参数的影响。
This article discusses the delayed fracture and localized polarization switching near a crack tip in three-point bending piezoceramics under electromechanical loading. We have used finite element analysis to study delayed fracture experiments with single-edge precracked-beam method. A nonlinear finite element analysis was employed to calculate the fracture mechanics parameters such as energy release rate for the permeable, impermeable, and open crack face boundary conditions. Recent proposed energetically consistent boundary conditions were also considered. The effects of applied electric field and localized polarization switching on the fracture mechanics parameters were then examined.