Abstract
Elastic anisotropy has a great influence on high-cycle fatigue but is rarely taken into account in the micro-macro fatigue criteria. The aim of this paper is to overcome this deficiency by developing a new fatigue limit criterion suitable for non-proportional loads and taking into account anisotropic cubic crystals. Attention is focused upon the Papadopoulos’s integral criterion. This criterion supposes that the elastic properties of the representative elementary volume of the material and its constituent grains were the same. In general, this assumption is not hold true. To describe the meso-macro transition, the author uses the Lin-Taylor scheme. In this work we propose the extension of this integral criterion, using the self-consistent scheme of Bui. This makes it possible to take into account the cubic anisotropy of the ferrite inclusions. The application of the new criterion on 42CrMo4, 34Cr4, CK45 and 25CrMo4 steels gives very satisfactory results.
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Acknowledgements
The authors gratefully acknowledge Ioannis Papadopoulos for very valuable advice on his fatigue integral criterion, Jan Papuga for fruitful discussion of the effect of normal stress. This work is part of the certification in virtual railway (CERVIFER) project and was supported by ADEME though the program “Véhicule du futur des investissements d’avenir”.
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Amouzou, K., Charkaluk, E. (2018). A New High-Cycle Fatigue Criterion Based on a Self-consistent Scheme for Hard Metals Under Non-proportional Loading. In: Ambriz, R., Jaramillo, D., Plascencia, G., Nait Abdelaziz, M. (eds) Proceedings of the 17th International Conference on New Trends in Fatigue and Fracture. NT2F 2017. Springer, Cham. https://doi.org/10.1007/978-3-319-70365-7_4
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DOI: https://doi.org/10.1007/978-3-319-70365-7_4
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