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About this Abstract
Meeting	2025 TMS Annual Meeting & Exhibition
Symposium	Verification, Calibration, and Validation Approaches in Modeling the Mechanical Performance of Metallic Materials
Presentation Title	Uncertainty Quantification of Crystal Plasticity Parameters Using ExaConstit
Author(s)	Venkata Sai Harshit Gaddam, Robert Carson, Leonidas Zisis, James F. Belak, Michael D. Sangid
On-Site Speaker (Planned)	Venkata Sai Harshit Gaddam
Abstract Scope	Uncertainty Quantification (UQ) performed on crystal plasticity finite element (CPFE) simulations enables researchers to place confidence bounds on the output and understand the source of variability in the results. Due to the time-consuming nature of the CPFE simulations, UQ analysis has traditionally been performed using surrogate models. Surrogate models exhibit inherent uncertainty in the form of modeling errors which may interfere with the results of the UQ analysis. Utilizing Oak Ridge National Laboratory’s exascale system, Frontier, and ExaConstit, an open-source CPFE code capable of running on GPUs, we propose an analysis that conducts UQ analysis using direct CPFE simulations. The results of this method are compared with the First Order Second Moment (FOSM) approach as an established method in literature for UQ on CPFE simulations. Additionally, the effect of simulation size (including single crystal vs polycrystalline sensitivity analysis) will be examined as part of the UQ study.
Proceedings Inclusion?	Planned:

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