About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
Micromechanical Modeling of Plastic Damage in Metallic Materials |
Author(s) |
Gururaj Gopal Rao, Leslie T Mushongera |
On-Site Speaker (Planned) |
Gururaj Gopal Rao |
Abstract Scope |
The accurate prediction of fatigue life requires the need to know the governing mechanistic drivers for crack initiation at the microscale (the scale at which cracks initiate). However, identification of these mechanistic drivers in metallic materials is challenging because the microstructure in the vicinity of the crack initiation sites evolves continuously with cyclic loading. The continuous evolution of the microstructure generates complex deformation fields and interactions which makes it difficult to pinpoint the governing mechanistic drivers for crack initiation. A diffuse-interface phase-field model is integrated into a small strain plasticity model to study the role of microstructural defects on fatigue. For calculations of plastic strains, a Prandtl-Reuss-type model consisting of an associated flow rule in combination with the von Mises yield criterion and a linear isotropic hardening approximation is implemented. The governing mechanistic drivers at the microstructure level for crack initiation during fatigue damage are identified and quantified. |
Proceedings Inclusion? |
Planned: |
Keywords |
Modeling and Simulation, |