About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
A Crystal Plasticity Model with Intragranular Heterogeneity – Application to Steel Forming |
Author(s) |
Carlos N. Tome, Anirban Patra |
On-Site Speaker (Planned) |
Carlos N. Tome |
Abstract Scope |
A dislocation-density-based crystal plasticity constitutive model for glide kinetics and hardening is implemented in the effective medium Visco-Plastic Self Consistent (VPSC) framework. A distribution of intragranular stresses is introduced in the VPSC code, instead of the conventionally used mean value of grain stress. In order to obtain the parameters describing the distribution of intragranular stresses within grains the model is calibrated for a bcc ferritic steel with an initial rolled texture using a finite element crystal plasticity (CP-FE) framework. Simulations are performed for initially textured and random aggregates. The novelty of the work is that when the same constitutive model and associated parameters are implemented in VPSC and CP-FE both approaches predict the same aggregate stress-strain response and total dislocation densities. The resulting tool has the computational efficiency of the VPSC formulation while accounting for intragranular microstructure through the information provided by the more computationally intensive CP-FE approach. |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, |