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A non linear energy model of fatigue damage accumulation and its verification for Al-2024 Aluminium alloy

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2013
auteur(s) Djebli Abdelkader; Aïd Abdelkrim; Bendouba Mostefa; Amrouche Abdelwaheb; Benguediab Mohamed; Benseddiq Noureddine
journal (abréviation) International Journal of Non-Linear Mechanics (Int J Non Lin Mech)
volume (numéro) 51
pages 145 – 151
résumé A method of fatigue damage accumulation based upon application of energy parameters of the fatigue process is proposed in the paper. Using this model is simple, it has no parameter to be determined, it requires only the knowledge of the curve W-N (W: strain energy density N: number of cycles at failure) determined from the experimental Wöhler curve. A computing Matlab-based algorithm of the fatigue life prediction methodology was developed. The proposed damage indicator is connected cycle by cycle to the Wöhler curve. Cycles were counted with the rain-flow algorithm, and damage was accumulated with this model and with the Palmgren-Miner rule.
An experimental verification shows a satisfactory agreement between the fatigue life calculation results by the proposed model and test results.
Estimated and experimental lives are found to exhibit good agreement.
mots clés Fatigue damage accumulation; Damage model; Energy criterion; Programmed loading; Alumunium alloy
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