Electrical resistance change method for monitoring delaminations of CFRP laminates: effect of spacing between electrodes

The present study employs an electrical resistance change method for monitoring delamination. The authors have found that the electrical resistance change method using response surfaces is very effective in identify delaminations in CFRP laminates both experimentally and analytically. In the present study, the effect of the spacing between electrodes on the method is investigated using 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 the effect of the spacing depends on the fiber volume fraction. For laminates of high fiber volume fraction, a short spacing is required to obtain high estimation performances of delamination location and length.