A Study of the Fatigue Behavior of Fiber Reinforced Composites.

摘要

The fatigue failure of graphite fiber reinforced nylon is influenced by both the technique of fabrication of the composite and environmental conditions. Compression molded materials exhibited an isothermal brittle fatigue failure through initiation and propagation of cracks. Injection molded materials were non-linear, exhibiting ductile flow prior to ultimate failure. It is postulated that localized flow at a crack tip caused thermal melting, leading to a thermally induced fatigue failure. This study indicated that processing characteristics such as fiber breakage, overlap and orientation strongly influence the fatigue endurance of the products.