Theoretical and Numerical Investigation on Crack Identification Using Piezoelectric Material-Embedded Structures
Theoretical and Numerical Investigation on Crack Identification Using Piezoelectric Material-Embedded Structures
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使用压电材料嵌入式结构进行裂纹识别的理论和数值研究
DOI：
10.2472/jsms.49.3appendix_41
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
Zhengxing. Liu
中科院分区：
文献类型：
--
作者：
S. Li;S. Kubo;T. Sakagami;Zhengxing. Liu
本文对压电材料在结构裂纹识别中的应用进行了理论和数值研究。首先，利用压电材料设计了一个裂纹估计模型。将模型的求解过程分为断裂力学分析和压电分析两个步骤进行了简化分析。采用了两种假设，即MLTNM假设和恒定应变假设。通过这两个分析步骤，可以得到裂纹对电位分布的影响。然后利用有限元程序对理论计算结果和数值计算结果进行了比较。并利用该理论找到了裂纹参数与电位分布之间的关系。进行了裂纹识别的数值模拟。证明了压电材料用于裂纹识别的适用性。
This work presents theoretical and numerical investigation on crack identification using piezoelectric materials embedded in structures. At first, a crack estimation model was designed by using piezoelectric materials. A simplified analysis was employed by separating the solving procedure for this model to two steps: fracture mechanics analysis and piezoelectric analysis. Two hypotheses named as the MLTNM hypothesis and the constant strain hypothesis were adopted. By means of these two analysis steps, the effect of the crack on the potential distribution can be obtained. Then taking use of a finite element program, comparisons between theoretical and numerical results were examined. The theory was also used to find the relationship between the crack parameters and the potential distribution. Numerical simulations of crack identification were made. The applicability of the use of piezoelectric materials to crack identification was demonstrated.