高分子材料の疲労特性に及ぼす環境効果

概要

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The effects of environments of kerosene and water on the fatigue crack initiation and fatigue life in polycarbonate were investigated. The fatigue tests were carried out on circularly notched specimens under axial loading conditions. The environment of kerosene significantly affected the fatigue crack initiation, propagation and fatigue life. Namely, the fatigue crack initiation was promoted by kerosene, but the fatigue crack propagation was markedly restrained under kerosene, which resulted in longer fatigue life than that in air. The appearances of the specimen surface and the fracture surface suggest that the mechanisms of the fatigue crack initiation and propagation under kerosene are different from those in air. On the other hand, the fatigue crack initiation and fatigue life were not appreciably affected by the environment of water, which may be due to the low capacity for absorbing water in this material.
愛媛大学の論文