|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||Probabilistic Analysis of the Fatigue Incubation Life Distribution in an A713 Cast Aluminum Alloy Based on a Multi-sized Pore-sensitive Numerical Model
||Lin Yang, Yan Jin, Zhiqiang Xu, Tongguang Zhai
|On-Site Speaker (Planned)
A fatigue incubation life prediction methodology was based on a multi-sized 3-D pore-sensitive numerical model that took into account of the 3-D effect of microstructure (pore), pore size, pore position, number density and applied cyclic stress in quantification of the fatigue reliability of an A713 cast aluminum alloy. The fatigue weaklink density and strength distribution were first calculated using the multi-sized pore model, showing that the rate of crack initiation at pores in surface by the numerical model was consistent with the experimental data. It followed a Weibull function of the applied cyclic stress. The calculated probability of fatigue incubation at each stress level indicated that the non-crack initiation rate (survival rate for crack initiation) increased from ~0.2% to ~2% when the stress level decreased from 110% yield strength to 50% yield strength.
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