Article Dans Une Revue Journal of Theoretical, Computational and Applied Mechanics Année : 2024

Non-local fatigue criterion based on standard deviation for notches and defects in Ti-6Al-4V

Résumé

The aim of this study is to propose a non local multiaxial fatigue criterion in order to assess the fatigue limit of stress concentrator such as notches or defects in Ti-6Al-4V. This criterion is based on the standard deviation of the stresses integrated over a given volume around the hot spot point. Up to now, the standard deviation has never been tested as an indicator of stress heterogeneity to assess fatigue life of notch components. Four parameters are necessary to identify the criterion. The criterion is first validated on notched samples based on literature results and shows very good results. A set of experimental tests is conducted on natural and artificial defects including clustering defects and demonstrates the flexibility and accuracy of the criterion.

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Dates et versions

hal-04254054 , version 1 (23-10-2023)
hal-04254054 , version 2 (23-09-2024)

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Natan Bodlet, Rémi Amargier, Yves Nadot. Non-local fatigue criterion based on standard deviation for notches and defects in Ti-6Al-4V. Journal of Theoretical, Computational and Applied Mechanics, 2024, pp.1-18. ⟨10.46298/jtcam.12473⟩. ⟨hal-04254054v2⟩
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