抄録
In this paper, a growth rate law of a small fatigue crack is proposed for an arbitrary metal. Moreover, another method is proposed for considering a size distribution of spheroidal defects cut by the specimen surface. Both methods are used to predict the high-cycle fatigue life reliability with a large scatter due to the defects. Rotating bending fatigue tests are carried out concretely on a kind of Aluminum Cast Alloy with entectic Si, Fe compounds and porosities. Comparing with experimental data, the validity of the present method predicting for fatigue life reliability from a defect is examined and confirmed.
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