Fatigue crack growth under large scale yielding condition: The need of a characteristic length scale
| Autor: | V. Fontanet, Alain Köster, Luc Rémy, D. Missoum-Benziane, H. Wang, A. Heudt, Vincent Maurel, F. Salgado-Goncalves, Mariem Trabelsi, Matthieu Rambaudon |
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| Přispěvatelé: | Centre des Matériaux (MAT), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Safran Engineering Services (SES), SAFRAN (FRANCE) |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Scale (ratio) Characteristic length High temperature fatigue 02 engineering and technology Crack growth resistance curve Industrial and Manufacturing Engineering Strain energy Crack closure 0203 mechanical engineering mental disorders General Materials Science Strain energy method Compact tension specimen Stress concentration Non-local model business.industry Mechanical Engineering Low cycle fatigue Structural engineering Paris' law 021001 nanoscience & nanotechnology 020303 mechanical engineering & transports In situ observation Mechanics of Materials Modeling and Simulation [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci] 0210 nano-technology business |
| Zdroj: | International Journal of Fatigue International Journal of Fatigue, Elsevier, 2017, 102, pp.184-201. ⟨10.1016/j.ijfatigue.2017.03.021⟩ |
| ISSN: | 0142-1123 |
| DOI: | 10.1016/j.ijfatigue.2017.03.021 |
| Popis: | International audience; Fatigue crack growth under large scale yielding condition is studied for a commercial base Co superalloys, Haynes® 188, for single edge notch (SENT) specimen. Due to very high temperature and applied strain values, it is observed that major crack interacts with micro-cracks pattern. These micro-cracks are found to be associated to strain localization and local high triaxiality stress ratio. Detailed analysis of strain localization and stress concentration was used to define an optimal characteristic length used in a non-local modeling of strain energy involved in crack growth process. To obtain robust and low time consuming crack growth modeling, a post-processing methodology is thus proposed for fatigue crack growth under large scale yielding. This point was successfully achieved for SENT specimen test series to describe crack growth rate. Finally, test driven for another geometry has enabled to validate the proposed modeling methodology. |
| Databáze: | OpenAIRE |
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