About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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AI/Data Informatics: Computational Model Development, Verification, Validation, and Uncertainty Quantification
|
Presentation Title |
Mapping Anisotropic Yield Surface Models to Surrogate Isotropic Models Using Strongly Typed Interpretable Machine Learning |
Author(s) |
David L. Randall, Karl Garbrecht, Brian Phung, Joshua Robbins, Jacob D. Hochhalter |
On-Site Speaker (Planned) |
Brian Phung |
Abstract Scope |
Interpretable machine learning (IML) has been used to train continuum plasticity models in a range of applications. While interpretable, these models must still be implemented for material- or structure-scale simulations, e.g., within a finite element (FE) solver. To automate this process, an alternative approach is developed that requires implementation of only one isotropic surrogate model. Instead, an IML-based anisotropic surface and mapping are provided as input to the implemented isotropic surrogate. The approach is based on the work of Oller et al. (CMAME 2003), who used the transformed-tensor method (TTM) to map an anisotropic yield criterion to a “fictitious” isotropic yield criterion. That method is extended here to determine the requisite transformation-tensors as a function of evolving state variables (e.g., plastic strain) using strongly typed genetic programming-based symbolic regression. |
Proceedings Inclusion? |
Planned: |
Keywords |
Machine Learning, Computational Materials Science & Engineering, |