Mechanism of Damage Propagation in CFRP/AFRP Hybrid Laminates under Fatigue Flexural Loading

抄録

AFRP laminated plates, CFRP laminated plates and CF/AF hybrid laminated plates which were composed of epoxy resin and plane woven carbon cloth or aramid cloth or both were used as specimens. Flexural fatigue tests were carried out in a completely pulsating constant maximum load using a four-point bending method. At each stage during the testing, surface strains of the specimen, compliances, residual deflections and absorbed energies were measured and the damages were observed. It was shown that the fracture phenomena of the hybrid plates were similar to those of CFRP laminated plates and that the fracture mechanism of the hybrid plates was mainly dominated by the damage in the outermost CF layer of the compression side. Also a hybrid effect wherein the hybrid plates had a longer fatigue life than CFRP laminated plates under the same condition in the outermost CF layer of the compression side was clarified.