About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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AI/Data Informatics: Computational Model Development, Verification, Validation, and Uncertainty Quantification
|
Presentation Title |
Machine Learning-Based Constitutive Model Parameter Estimation |
Author(s) |
Abhishek Bhesania, Mark Messner |
On-Site Speaker (Planned) |
Abhishek Bhesania |
Abstract Scope |
Constitutive relations determine the material response under mechanical force. Parameters for these relations are derived from experimental results which are limited due to practical time limits. For the studies like creep and fatigue, material performance information for a longer duration is desirable. Further, if the material application is in an extreme environment, the non-linearity arises because of the inelastic effects. For such a scenario, using machine learning for parameter extrapolation from the limited experimental data is the best approach.
In this work, we perform Bayesian inference to train a statistical constitutive model against the available experimental training data for A709 structural steel. We perform the gradient descent optimization method using the pyzag and neml2 package to fit the defined statistical constitutive model to the experimental tensile and creep data for A709 material. We then employ the model to make predictions of the material performance at longer durations (~100000 hrs). |
Proceedings Inclusion? |
Planned: |
Keywords |
Other, Characterization, Other |