A fatigue model for sensitive materials to non-proportional loadings |
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| Affiliation: | 1. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, Gansu, China;2. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China;1. SNCF – Innovation and Research, 40 Avenue des Terroirs de France, 75611 Paris Cedex 12, France;2. Université de Lyon, CNRS INSA-Lyon, LaMCoS, UMR5259, 20 Avenue Albert Einstein, F69621 Villeurbanne Cedex, France;3. SNCF Réseau – Maintenance & Travaux, 18 rue de Dunkerque, 75010 Paris, France |
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| Abstract: | The present study proposes a novel fatigue model based on virtual strain energy. This model separates loading paths based on their non-proportionality where directly takes into account the loading in fatigue life prediction. The proposed fatigue model is expressed in two tension-based and shear-based equations for two tensile and shear cracking failure modes. The model was validated against several experimental datasets available in the literature. In addition, obtained results were compared to predicted lives through some well-known fatigue models comprising maximum shear strain, Smith–Watson–Topper, and Fatemi–Socie. The results were strongly correlated with the experimental data indicating accuracy of the model. |
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| Keywords: | Multiaxial fatigue Fatigue model Non-proportional loading Loading path Fatigue life prediction |
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