Article Dans Une Revue International Journal of Fatigue Année : 2025

An elastoplastic analysis of fretting crack nucleation: Correlation between critical distance and grain size

Résumé

This study investigates the influence of microstructural size and stress gradients on crack nucleation in ferrite-pearlite steel under cylinder/plane fretting conditions. An experimental and numerical approach establishes a critical distance that correlates with grain size, revealing a significant distinction between elastic and elastoplastic behaviour. The results indicate that the optimal critical distance l approximates the grain size, highlighting that an internal stress exceeding the fatigue limit σ_(d,-1) is needed to nucleate. The findings emphasize the necessity of elastoplastic modelling for accurately describing the mechanisms of crack nucleation under high stress gradients, as previous elastic-only analyses may yield misleading interpretations.

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Dates et versions

hal-05378031 , version 1 (22-11-2025)

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Hugo Lannay, Siegfried Fouvry, Bruno Berthel, Camille Gandiolle, Pierre Arnaud. An elastoplastic analysis of fretting crack nucleation: Correlation between critical distance and grain size. International Journal of Fatigue, 2025, 195, pp.108854. ⟨10.1016/j.ijfatigue.2025.108854⟩. ⟨hal-05378031⟩
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