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Article Dans Une Revue Fatigue and Fracture of Engineering Materials and Structures Année : 1999

Micromechanical simulations of microstructure-sensitive Stage I fatigue crack growth

Véronique Doquet

Résumé

Simulations of dislocation dynamics at the tip of a Stage I crack are performed, taking into account the influence of the normal stress on the friction of the crack flanks and on the condition for dislocation emission at the crack tip. The interactions of the emitted dislocations with microstructural obstacles are analysed. The repeated decelerations and sometimes arrests that characterize Stage I crack growth are properly described by the model, and the differences in Stage I kinetics observed in reversed torsion and push–pull are analysed in terms of crack tip–grain boundary interactions.
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hal-00111622 , version 1 (15-02-2023)

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Paternité - Pas d'utilisation commerciale

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Véronique Doquet. Micromechanical simulations of microstructure-sensitive Stage I fatigue crack growth. Fatigue and Fracture of Engineering Materials and Structures, 1999, 22 (3), pp.215-223. ⟨10.1046/j.1460-2695.1999.00157.x⟩. ⟨hal-00111622⟩
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