PS32 電気抵抗変化法のCFRP積層板への適用における銅めっき一体電極の疲労特性評価(ポスターセッション)

概要

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For Caibon Fiber Reinforced Plastic (CFRP), electrical conductivity of caibon fiber can be used as a sensor for damage detection. The change of electrical resistance of the CFRP structure has been studied as a self-sensing system for monitoring damages. Todoroki et al. reported that the electrical resistance change meihod successfully monitored various damages like matrix cracking, fiber breakage and delamination in CFRP laminates. To apply the electrical resistance change method to practical structures, reliability of the electrodes is a key issue. This paper contains the proposal of "Lead-Wire Integrated Electrodes" and the investigation of the reliability of the proposed electrodes under cyclic load. The electrodes were bonded to CFRP surface by using copper plating after polishing of the specimen surface with sandpaper to remove the surface resin. Lead-Wire was put on the plating surface and bonded to the electrode by using copper plating, so the electrode and Lead-Wire were integrated. One of advantages of this proposed electrode is no initial defect Fatigue tests were carried out using a servo-hydraulic testing system. As a result, the electrodes had a fatigue life at the same level as the conventional strain gages under cyclic load.
2009-07-24