Cyclic fatigue crack growth in three-point bending PZT ceramics under electromechanical loading
Cyclic fatigue crack growth in three-point bending PZT ceramics under electromechanical loading
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DOI：
10.1111/j.1551-2916.2007.01774.x
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发表时间：
2007-08-01
影响因子：
3.9
通讯作者：
Saito, Fumitoshi
中科院分区：
文献类型：
--
作者：
Narita, Fumio;Shindo, Yasuhide;Saito, Fumitoshi
本文对压电陶瓷在机电载荷作用下的循环疲劳裂纹扩展进行了实验研究和理论分析。对锆钛酸铅（PZT）陶瓷在去电场作用下进行了循环裂纹扩展试验，并采用有限元分析方法计算了渗透裂纹模型的最大能量释放率。基于单边预裂纹梁试样的弯曲实验，发现循环疲劳裂纹扩展速率对最大能量释放速率和外加直流电场敏感。裂纹扩展的可能机制进行了讨论，通过扫描电子显微镜检查的PZT陶瓷的断裂表面。
This paper investigates experimentally and analytically the cyclic fatigue crack growth in piezoelectric ceramics under electromechanical loading. Cyclic crack growth tests were conducted on lead zirconate titanate (PZT) ceramics subjected to de electric fields, and a finite element analysis was used to calculate the maximum energy release rate for the permeable crack model. Based on bending experiments using single-edge precracked-beam specimens, cyclic fatigue crack growth rates are found to be sensitive to the maximum energy release rate and applied dc electric fields. Possible mechanisms for crack growth were discussed by scanning electron microscope examination of the fracture surface of the PZT ceramics.