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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Verification, Calibration, and Validation Approaches in Modeling the Mechanical Performance of Metallic Materials
Presentation Title A Critical Discussion of Stress-Based and Stress Increment-Based Elasto-Visco-Plastic Self-Consistent (EVPSC) Models
Author(s) Youngung Jeong, Bohye Jeon, Carlos Tome
On-Site Speaker (Planned) Youngung Jeong
Abstract Scope Crystallographic elasto-visco-plastic self-consistent (EVPSC) constitutive models provide a physically reliable mechanism-based tool for simulating mechanical response of polycrystal aggregates. Two different EVPSC formulations, based on solving either stress or stress increment, are critically discussed here and their advantages and shortcomings are demonstrated by comparing the model-predicted results with the experimental data obtained for an FCC stainless steel. In addition to the average polycrystal stress and strain responses, intergranular dispersions in stress and strain rates are investigated. The results demonstrate that the unwanted dependence of intergranular responses on the time increment used scales with the strain increment. Two numerical methods are suggested to mitigate this dependence, and their validity is discussed through finite element analyses of bending and springback of a steel strip.
Proceedings Inclusion? Planned:
Keywords Mechanical Properties, Modeling and Simulation,

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