複合材中のはく離欠陥の検出に対する受動型電気ポテンシャルCT法の適用
An Application of the Passive Electric Potential CT Method to Detection of Delamination in Composite Materials
著者:
中谷 健作 Kensaku NAKATANI 久保 司郎 Shiro KUBO 阪上 隆英 Takahide SAKAGAMI
発刊日:
公開日:
概要
When a piezoelectric film is glued on the surface of a structure member subjected to mechanical load, a distribution of electric potential is induced. In the existence of defects in the member, a characteristic variation of electri c potential is observed. Based on this phenomenon, the passive electric potential CT method is developed for detection and identification of defects in a structure. In this study, the applicability of the passive electric potential CT method to the detection and identification of a delamination in a CFRP laminate was investigated. The effect of the delaination on the electric potential distribution are investigated both numerically and experimentally. Identi fication of delamination by inverse analyses follows. The location and seize of the delamination were estimated accurately. For the estimation of the depth of delamination, the accuracy was deteriorated with increase in the depth.
