Abstract
Since a delamination of laminated composites is usually invisible or difficult to detect visually. The delamination causes low reliability for primary structures. To improve the low reliability, automatic systems for delamination identifications in-service are desired. The present study employs and electric resistance change method for detections of the delaminations. Since the method adopts reinforcement carbon fiber itself as sensors for the delamination detections, this method doesn't cause reduction of static strength or fatigue strength, and the method is applicable to existing structures. Authors have revealed that the electric resistance change method with response surfaces is very effective experimentally and analytically. For the estimations of delamination locations, this method reveals excellent high performance of estimations of delamination location. Multiple electrodes are mounted on the specimen surface in this method. The spaces between the electrodes mounted on the specimen surface cause the difference for the performance of estimations of delamination. We change the spaces between the electrodes on the specimen surface and investigated the influence of the spaces for the delamination monitoring.
