213 受動型電気ポテンシャル CT 法による裏面 3 次元き裂の同定に関する実験的検討

概要

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When a piezoelectric film is glued on the surface of a cracked material subjected to load, change in distribution of electric potential is observed on the surface of piezoelectric film. Based on this phenomenon, the passive electric potential CT (computed tomography) method was developed for identifying two- and three-dimensional cracks. In this study, this method was experimentally applied to identify three-dimensional crack opening on the back surface. Electric potential distribution on the piezoelectric film mounted on the front surface was measured by non-contact voltmeter. Measured electric potential distribution agreed well with that calculated by FEM. The inverse method based on the least residual method was applied for estimating the location and size of crack from measured electric potential distribution. It was shown that the passive electric potential CT method using piezoelectric film was useful for quantitative identification for back-surface three-dimensional crack.
一般社団法人日本機械学会の論文