Abstract
To increase the strength of CFRP bolted joints, we have tried to gain ffiction force between CFRP members by increasing a friction coefficient and a bolt-fastening force. In this study, the joint strength and the failure behavior of conventional and proposed joint were examined by finite element method analyses with degradation rules of material properties. The results show that the joint strength of the proposed joint was higher than that of conventional joint and the failure behavior was different from that of the conventional joint. To investigate the strength and the failure behavior of the actual proposed joint, the single-lap joint tensile tests with AE monitoring were conducted. The failure strengths of CFRP bolted joints with high-friction sheets and cone washers were higher than those of conventional CFRP bolted joints, and the failure behavior of the proposed joint was different from that of the conventional joint just like the finite element method analyses.
