抄録
The correlation of mode I fracture bahavior between carbon fiber reinforced plastics and their matrix resins were investigated over a wide range of loading rate to clarify the effects of strain rate. The fracture toughness of composites was approximately equal to that of matrix resin at higher loading rate than a peculiar value of the material. The cohesive fracture of matrix resin was dominant fracture mode at lower loading rate. The debonding of fiber/matrix interface was, however, dominant fracture mode at higher loading rate. The above tendency was similar without respect to the toughness of matrix resin, conventional epoxy, toughened epoxy and polyetheretherketon.
