About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Deformation-induced Microstructural Evolution during Solid Phase Processing: Experimental and Computational Studies
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Presentation Title |
Meshfree Simulation of Solid Phase Processing and Microstructure Analysis Using a Dislocation Density-based Constitutive Model |
Author(s) |
Lei Li, Glenn Grant, Ayoub Soulami |
On-Site Speaker (Planned) |
Lei Li |
Abstract Scope |
Simulating solid phase processing (SPP) processes such as Friction Stir Processing (FSP), Friction Extrusion (FE), and Shear Assisted Processing and Extrusion (ShAPE) necessitates the use of high-fidelity constitutive models to accurately capture the dynamic temperature-dependent material flow after severe plastic deformation. The commonly used empirical models such as Johnson-Cook (J-C) and Ramberg-Osgood (R-O) are predictive only within the strain, strain rate, and temperature ranges where the model parameters are calibrated. They are also incapable of accounting for microstructural features such as crystal structure, grain size, and dislocation density. Two-variable hybrid dislocation informed viscoplastic constitutive model is developed and incorporated into a meshfree smoothed particle hydrodynamics (SPH) framework for simulating SPP and microstructure evolution in a strongly coupled manner. It is shown that the calibrated physics-based model leads to improved predictions by accurately capturing plastic stress dependence on a wide range of strains, strain rates, and temperatures. |
Proceedings Inclusion? |
Planned: |
Keywords |
Aluminum, Computational Materials Science & Engineering, Modeling and Simulation |