About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
PRISMS-Fatigue Framework: Effects of Sample Size, Grain Neighborhood, and Surface Roughness on Extreme Value Fatigue Response |
Author(s) |
Mohammadreza Yaghoobi, Krzysztof S. Stopka, John E. Allison, David L. McDowell |
On-Site Speaker (Planned) |
Mohammadreza Yaghoobi |
Abstract Scope |
PRISMS-Fatigue is a novel open-source framework that enables simulation-based comparisons of microstructures with regard to fatigue resistance for polycrystalline metals and alloys. The framework uses the crystal plasticity finite element software PRISMS-Plasticity as its microstructural analysis tool. PRISMS-Fatigue is incorporated to investigate the effect of sample length scale, grain neighborhood, and surface roughness on the extreme value fatigue response. An increase in the intensity of realistic surface roughness profiles corresponds accordingly to larger FIPs but it is difficult to precisely interpret the mechanisms and effects of this intensification. We thus parametrically investigate surface asperities that couple with microstructure and lack of constraint on slip at the free surface to describe microstructure-sensitive surface roughness knockdown effects on fatigue resistance. The depth of a single valley (i.e., notch) due to surface roughness is found to be more detrimental to fatigue resistance than the radius. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, ICME, Modeling and Simulation |