747 電気抵抗変化法による CFRP のはく離モニタリングに及ぼす電極間隔の影響  [in Japanese] Electric Resistance Change Method to Monitor Delaminations of CFRP Laminates : Effect of Spacing between Electrodes  [in Japanese]

The present study employs an electric resistance change method for delamination detection. Authors have found that the electric resistance change method with response surfaces is very effective to identify delaminations in CFRP laminates experimentally and analytically. In the present study, effect of spacing between electrodes on the method is investigated with FEM analyses. Five types of spacing are analyzed here, and the two types of fiber volume fractions are also calculated. Cross-ply beam type specimens are adopted for the analyses. As a result, it was revealed that effect of the spacing depends on the fiber volume fraction. For laminates of high fiber volume fraction, short spacing is required to obtain high estimation performance of delamination location and length.