Abstract
In recent years, a large number of CFRP members are used in aircrafts for weight saving. One of the major fastening methods for the CFRP members is bolted joint. CFRP bolted joints, although, have a problem that the cracks or plastic deformation are occurred at the bearing surface of CFRP members even by the tightening with low fastening force. As a result, CFRP failures around bolt holes occur by stress concentration, and strength of a CFRP joint becomes decreased. In order to improve this problem, configurations of the washers are changed in this study to relax stress concentration, and thin sheet with high friction coefficient is sandwiched between CFRP members to improve the friction force. In the validation testing, the failure strength of the proposal CFRP bolted joint become higher than normal CFRP bolted joints.
