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Comparative evaluation of fatigue life estimation under variable amplitude loading through damage models based on entropy.
  • +3
  • Arturo Abúndez-Pliego,
  • Víctor Rodríguez-Reyes,
  • Kevin E. Petatan-Bahena,
  • Kevin R. Miranda Acatitla,
  • Jorge Colín-Ocampo,
  • Andrés Blanco-Ortega
Arturo Abúndez-Pliego
Tecnologico Nacional de Mexico

Corresponding Author:[email protected]

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Víctor Rodríguez-Reyes
Tecnologico Nacional de Mexico
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Kevin E. Petatan-Bahena
Tecnologico Nacional de Mexico
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Kevin R. Miranda Acatitla
Tecnologico Nacional de Mexico
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Jorge Colín-Ocampo
Tecnologico Nacional de Mexico
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Andrés Blanco-Ortega
Tecnologico Nacional de Mexico
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Abstract

Three fatigue damage models based on entropy, originally developed for constant amplitude loading, were assessed and compared each other in order to state whether its applicability can be extended towards variable amplitude loading conditions. A variable amplitude loading history, applied on a 2024-T3 aluminum alloy reported in the literature, was processed using both rainflow cycle counting and spectral techniques to transform it into a distribution of simple processes with constant amplitudes, then the damage models were assessed under the new loading conditions. The results showed that the model by Khonsari, combined with the rainflow technique, exhibited the highest accuracy with respect to the referenced experimental results with -0.67 standard deviation from the average data and 16% error from the median. Therefore, it is possible to assess the fatigue damage accumulation in metallic materials under variable amplitude loading through a thermodynamic approach with models developed for constant amplitude loading.
07 Sep 2023Submitted to Fatigue & Fracture of Engineering Materials & Structures
08 Sep 2023Submission Checks Completed
08 Sep 2023Assigned to Editor
19 Sep 2023Reviewer(s) Assigned
15 Oct 2023Review(s) Completed, Editorial Evaluation Pending
16 Oct 2023Editorial Decision: Revise Major