Influence of Ductility of Resin Matrix on Fatigue Crack Propagation for Recycled FRTP

The fatigue reliability of recycled advanced fiber-reinforced thermoplastic resin (FRTP) was examined, with particular attention to the effects of mesoscopic factors on the fatigue crack propagation. The main results obtained were as follows. (1) The recycled PPS materials were inferior in fatigue reliability to recycled PA·66 materials. The'm'values of Paris's law for recycled PPS materials were considerably higher than that of PA·66. FCP properties of recycled PPS materials were unstable. (2) From fractography using SEM, it was found in recycled PPS materials that the reinforced fibers were separated from the brittle resin matrix. Therefore it was understood that the effect of the ductility of resin matrix on the fatigue crack propagation for recycled FRTP was considerable.