Abstract
Fatigue fracture mechanism was investigated for polycarbonate plates with few contents of short glass fibers fabricated by an injection molding method. In this paper, fatigue fracture behavior under zero-tension cyclic loading was observed. It was found that (1) at a low stress amplitude, fracture occurred due to the initiation of surface crazes and the growth of shear cracks at their tips and (2) at a high stress amplitude, the shear cracking from glass fibers in the inside of the specimen, which were inclined at 45° to the loading axis, became a fracture nucleus.
