PSI - Issue 38

Jinchao Zhu et al. / Procedia Structural Integrity 38 (2022) 621–630 Author name / Structural Integrity Procedia 00 (2021) 000 – 000

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• The Stochastic NS method with r ref = r actual + 1 mm and FAT 200 (Case 4), predicts a lower fatigue life compared to using deterministic (mean) values of leg length, toe angle and toe radius (Case 3). • The influence of modeling the weld shape with convexity and concavity is negligible for the toe angle in the interval of 30° and 60°. This study demonstrates that there is a substantial difference in the predicted fatigue life depending on the used NS method. The prediction accuracy of the 4 studied cases needs to be investigated further in future work by validation against experimental observations. This work paves the way for including other sources of uncertainties such as stochastic residual stress field around the notch by including stochastic spatial fields (Alzweighi et al. (2021)) or using the stochastic finite-element method (SFEM) (Stefanou (2009)). Kainuma S, Mori T. A study on fatigue crack initiation point of load-carrying fillet welded cruciform joints. 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