About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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AI/Data Informatics: Applications and Uncertainty Quantification at Atomistics and Mesoscales
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Presentation Title |
Simultaneous Development and Robust Optimization of a Microstructure Dependent Material Model: Leveraging Sequential Monte-Carlo Methods to Enhance Symbolic Regression Analysis |
Author(s) |
Karl Garbrecht, Nolan Strauss, Geoffrey Bomarito, Patrick Leser, Jacob Hochhalter |
On-Site Speaker (Planned) |
Karl Garbrecht |
Abstract Scope |
Recent microstructure characterization techniques combined with Symbolic Regression (SR) analysis has been proven to generate white box plasticity models well suited for incorporation into FEA software. The current work builds upon those efforts and demonstrates the applicability of Sequential Monte-Carlo (SMC) methods within SR analysis to condense model development and robust optimization into a single, co-dependent process. In this project, SMC methods provide a mechanism through which the observed microstructure features and associated variability can be incorporated into the discovery phase of model development and simultaneously recover approximate parameter distributions. The demonstration utilized a data set of tensile test results from sample specimens with corresponding EBSD data. Synthetic volume elements with statistically equivalent microstructure to the sample specimens combined with simulated tensile test data for each volume element was used as training data for a SMC-SR algorithm. The resulting model was validated with data from the original empirical data. |
Proceedings Inclusion? |
Planned: |
Keywords |
Machine Learning, |