SYMPOSIA PAPER Published: 01 January 1994

Fatigue Life Prediction Under Periodical or Random Multiaxial Stress States


A fatigue life prediction method suitable for multiaxial stress states and constant amplitude or random loading is developed. In the case of random loading, a suitable counting variable is proposed so that the rainflow counting method can be applied in order to extract cycles. A multiaxial fatigue life criterion is used to define the damage corresponding to each cycle. This criterion is based on the quadratic mean value of a damage indicator over all the planes through the point where the fatigue life calculation is made. The validation of this criterion is made with periodical multiaxial fatigue test results. Miner's rule is used for the cumulation of the damage. The whole fatigue life of the component is evaluated in terms of the number of repetitions of the loading block.

Author Information

Robert, J-L
Laboratoire de Mécanique des Solides, INSA-LYON, Villeurbanne, France
Fogue, M
Ecole Polytechnique de Yaoundé, Cameroun
Bahuaud, J
Laboratoire de Mécanique des Solides, INSA-LYON, Villeurbanne, France
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Developed by Committee: E08
Pages: 369–387
DOI: 10.1520/STP13959S
ISBN-EB: 978-0-8031-5283-0
ISBN-13: 978-0-8031-1985-7