Study on the Fatigue Reliability Model Based on Probability Distribution of Fatigue Life under Spectrum Loading
Under variable amplitude load history the exact distribution of fatigue strength corresponding to a specified number of life cycles cannot be obtained exactly by test, fatigue strength distribution can be obtained from fatigue life distribution. According to statistical property analysis of Miner cumulative damage rule, probability distribution of fatigue life under variable amplitude load history is predicted based-on constant amplitude median Sa-Sm-N surface. In the end, a fatigue reliability model is established to calculate fatigue reliability according to stress distribution as well as fatigue life distribution function. The model is applicable to calculate fatigue reliability under stochastic load environments.
Y. Wu and L. Y. Xie, "Study on the Fatigue Reliability Model Based on Probability Distribution of Fatigue Life under Spectrum Loading", Applied Mechanics and Materials, Vols. 44-47, pp. 2788-2792, 2011