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Passive Electric Potential CT Method Using Piezoelectric Material for Identification of Plural Cracks

Daiki Shiozawa1, Shiro Kubo2, Takahide Sakagami2, Masaaki Takagi2
Department of Mechanical Engineering, Kobe University, 1-1, Rokkodai, Nada, Kobe 657-8501, Japan
Department of Mechanical Engineering, Graduate School of Engineering, Osaka University, 2-1, Yamadaoka, Suita, Osaka, 565-0871, Japan

Computer Modeling in Engineering & Sciences 2006, 11(1), 27-36. https://doi.org/10.3970/cmes.2006.011.027

Abstract

The passive electric potential CT (computed tomography) method using piezoelectric film was applied to the identification of plural through cracks. The use of piezoelectric material made it possible to obtain electric potential field without applying electric current. For identification of cracks an inverse analysis scheme based on the least residual method was applied, in which square sum of residuals is evaluated between the measured electric potential distributions and those computed by using the finite element method. Akaike information criterion (AIC) was used to estimate the number of cracks. Numerical simulations were carried out on the identification of plural cracks and a single crack. The location and size of these cracks were quantitatively estimated by the present method. The number of cracks was correctly estimated, even when the plural cracks were closely located and the measured electric potential distribution was similar to that for a single crack.

Keywords

Nondestructive evaluation, Crack identification, Electric potential CT method, Passive nondestructive method, Piezoelectric film, Damage monitoring, Plural cracks, Inverse analysis, Akaike information criterion

Cite This Article

Shiozawa, D., Kubo, S., Sakagami, T., Takagi, M. (2006). Passive Electric Potential CT Method Using Piezoelectric Material for Identification of Plural Cracks. CMES-Computer Modeling in Engineering & Sciences, 11(1), 27–36.



This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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