Abstract
This research is about FEM analysis of CFRP / Metal plate fastener especially about the mitigation effect for the internal stress of the rigidity and the site of a washer and a bolt. Carbon fiber reinforced plastic (CFRP) has the characteristics of lightweight, high tensile strength and high rigidly. therefore, it is suitable for the large structures like airplanes and space instruments. But in generally, an epoxy resin is used for CFRP, the compression strength is low. Therefore, about the fastener for the CFRP plates, axial force for the bolt /nut tightner must be set as low value compared with fastener for the Metal Plates. To avoid the loosening at the low cycle vibration increment of the allowable axial force for the tightner before failure is important. For the CFRP plate .main failure caused close to the bolt hole is matrix crack kinku and delamination caused by internal stress and sharing stress between analysis
