Title: An exergetic approach for materials fatigue

Authors: Patrick Ribeiro; Diogo Queiros-Condé; Lavinia Grosu; Laurent Gallimard

Addresses: LEME, Université Paris-Ouest Nanterre La Défense, 50 rue de Sèvres, 92410 Ville d'Avray, France ' LEME, Université Paris-Ouest Nanterre La Défense, 50 rue de Sèvres, 92410 Ville d'Avray, France ' LEME, Université Paris-Ouest Nanterre La Défense, 50 rue de Sèvres, 92410 Ville d'Avray, France ' LEME, Université Paris-Ouest Nanterre La Défense, 50 rue de Sèvres, 92410 Ville d'Avray, France

Abstract: An entropy approach has been recently developed, based on the irreversible thermodynamics and entropy production. It has been observed that, for low cycle fatigue, metals undergoing cyclic load reach fracture, at a certain level of entropy production called fracture fatigue entropy (FFE) (Naderi and Khonsari, 2010), solely dependent on the material. Until now, we only used the two principles of thermodynamics separately to follow the behaviour of a solid continuum problem as low cycle fatigue. We propose here to use the two laws of thermodynamics together via the Gouy-Stodola equation and the concept of exergy to provide a new description for metals undergoing low cycle fatigue.

Keywords: materials fatigue; exergy; fracture fatigue entropy; FFE; plastic deformation; irreversibility; thermodynamics; low cycle fatigue.

DOI: 10.1504/IJEX.2017.083172

International Journal of Exergy, 2017 Vol.22 No.3, pp.235 - 249

Received: 27 Jul 2016
Accepted: 07 Nov 2016
Published online: 21 Mar 2017 *

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