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Multiaxial fatigue criterion for complex loading based on stress invariants

โœ Scribed by Q.H. Vu; D. Halm; Y. Nadot

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
490 KB
Volume
32
Category
Article
ISSN
0142-1123

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โœฆ Synopsis

A multiaxial criterion for high cycle fatigue based on invariants of macroscopic stress tensor is proposed. The presence of J 2,mean allows capturing accurately effects of phase shift and frequency on fatigue limit of material under multiaxial loading. Prediction capacity of the proposed criterion is tested on 119 isofrequency axial-torsion experiments and some other more complex loadings: biaxial loading and asynchronous loading. Results show that the criterion is in good accordance with the experimental data. Under proportional loading, the assessment of the criterion can be carried out from an analytical solution. Under others loading cases, the numerical implementation of the criterion is very simple and can be easily integrated in a damage model or in a finite element code.

๐Ÿ“œ SIMILAR VOLUMES

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## Abstract It is assumed that the plane in which the maximum variance of the equivalent stress appears is critical for a material and the fatigue fracture should be expected in this plane. The equivalent stress is calculated according to the fatigue criterion of maximum shear and normal stresses i