抄録
Fracture control design is able to predict and to manage fracture by means of estimation of damage. It requires fatigue crack propagation behavior of structural materials. I investigated the effect of the environment and of the frequency on the fatigue crack propagation behavior of 5083-O and 7075-T651 aluminum alloys. Moisture accelerated crack growth among any other environment. Gas element has no effect on the crack growth either under a dry or a wet condition. The crack growth in the higher ΔK region was faster at a lower frequency under a dry condition. While the parameter "C" in Paris Law was related with environmental and mechanical factors, the parameter "m" was rather related with materials itself.
