Probabilistic Approach In High Cycle Multiaxial Fatigue: Volume And
Surface Effect
Author(s)
L. Flacelière & F. Morel
Abstract
Probabilistic approach in high cycle multiaxial
fatigue: volume and surface effect
L. Flaceliere & F. Morel
E.N S.MA.,Laboratoire de Me'canique et de Physique des Mate'riaux
(LMPW, UMR 661 7, Site du Futuroscope, Futuroscope Cedex, France
Abstract
In high cycle fatigue, it has been experimentally proved that the stress
distribution as well as the size of the loaded sample can change the fatigue
strength. The specimen free surface is also known to have an influence.
When dealing with multiaxial load conditions those effects still act. In this
paper, a multiaxial endurance criterion combined with the weakest link theory is
modified to describe the fatigue limit distribution under several load conditions
(tension, torsion, rotating bending and plane bending). With this model, all the
known effects on fatigue strength can be reflected and the probability for
endurance can be adequately predicted for any complex loading. The weakest
link theory can also account for the decrease of multiaxial fatigue
Keywords
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