Fatigue Life Prediction under Multiaxial Variable Amplitude Loading Using a Stress Invariant Based Criterion
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Abstract
Predicting fatigue damage for structural components subjected to variable amplitude loadings is a complex issue. In order to estimate fatigue life under those loading conditions, a multiaxial fatigue criterion must gather with a fatigue damage accumulation rule that allows capturing different damage mechanisms when they are activated. In this paper, combinations of a stress invariant based fatigue criterion with some damage accumulation rules are carried out to deal with variable amplitude loadings. An approach combining three tools, including multiaxial criterion, multiaxial S-N curves and cumulative damage rule are used in this study. Results show good correlations of fatigue life between experimental and predicted results for 1045 steel.
Keywords
Variable amplitude loading, multiaxial fatigue criterion, Damage accumulation
Article Details
References
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[2] A. Fatemi, L. Yang, Cumulative fatigue damage and life prediction theories: a survey of the state of the art for homogeneous materials, Int. J Fatigue. 20(1) (1998) 9-34.
[3] V. Papadopoulos, Long life fatigue under multiaxial loading. International Journal of Fatigue. 23 (2001) 839-849.
[4] M. A. Miner, Cumulative damage in fatigue, Journal of Applied Mechanics. 67 (1945) A159-A164.
[5] S.S. Manson, G.R. Halford, Practical implementation of the double linear damage rule and damage curve approach for treating cumulative fatigue damage, Int. Journ. of Fracture. 17 (1981) 169-192.
[6] L. Flacelière, Contribution à la modélisation du dommage en fatigue multiaxiale d'un acier C36 Confrontation à l'expérience. PhD Thesis, University of Poitiers, France (2004).