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2. Choosing a safety factor
To calculate the fatigue life of a part, a safety factor must be chosen. This coefficient is often determined by company practice. We won't go into the various types of endurance diagrams that can be used to calculate safety coefficients. We will only present the Haigh and Goodman diagrams for uniaxial calculations, or for multiaxial calculations using the equivalent stress approach. Next, the definition in the case of a multiaxial fatigue criterion will be presented.
2.1 Case of the Haigh diagram
The two most commonly used methods for determining the safety factor s from the Haigh diagram are shown in the graphs in figure 1 .
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Choosing a safety factor
Calculation of permissible limit stress under uniaxial loading
Bibliography
References
- (1) - LU (J.), FLAVENOT (J.F.), DIBOINE (A.), LASSERRE (S.), FROUSTEY (C.), BENNEBACH (M.), PALIN-LUC (T.) - Development of a General Multiaxial Fatigue Criterion for High Cycles of Fatigue Behaviour Prediction. - Multiaxial Fatigue and Design, ESIS 21, Edit. by A. Pineau, G. Cailletaud, T.C. Lindley, Mechanical Engineering Publications,...
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