Limite de fatigue des métaux

ISBN-10: 1784050156
ISBN-13: 9781784050153
Category: Metals
Pages: 148
Language: French
Published: 2015-01-01
Publisher: ISTE Group
Authors: Claude Bathias, Rubén Pérez Mora

Description

S’il est démontré que la rupture par fatigue peut se produire au-delà de 10^10 cycles, la question de la crédibilité de la notion de limite de fatigue normalisée se pose tant du point de vue pratique que fondamental. Après un état de l'art sur la fatigue gigacyclique des alliages industriels, cet ouvrage compile les résultats les plus récents sur cette même fatigue, incluant les phénomènes liés au champ de contraintes autour des défauts, la microplasticité, les transformations de phases, la dissipation thermique à haute fréquence, l'effet de la température et de la fréquence sur la courbe SN. Plus fondamentalement, le cas du fer Armco, bien connu pour sa courbe SN normalisée quasi-hyperbolique, est discuté dans le régime gigacyclique. Sur le plan pratique, la nonexistence du concept de durée de vie infinie est démontrée.

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