About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
|
3rd World Congress on Artificial Intelligence in Materials & Manufacturing (AIM 2025)
|
Presentation Title |
A Thermodynamically Consistent Neural Ordinary Differential Equation for Constitutive Modeling of Polycrystalline Metals |
Author(s) |
Paul G. Christodoulou, Liam Mackin, David Najera-Flores, Rohan Patel, Bradley Davidson, Jarred Heigel, Elliot Haag, Reed Kopp |
On-Site Speaker (Planned) |
Paul G. Christodoulou |
Abstract Scope |
It is difficult to formulate a robust constitutive model for path-dependent, nonlinear, heterogeneous materials, such as additively manufactured (AM) metals. The difficulty arising from material heterogeneity is compounded by competing material behaviors at various length scales. ATA recently developed a Neural Ordinary Differential Equation (NODE) constitutive model with multiplicative Deformation Gradient Decomposition (DGD) to enable automatic discovery of these path-dependent constitutive models from stress-strain data. DGD-NODE ensures a thermodynamically consistent set of internal state variables and state variable evolution laws to describe the elastic, plastic, and thermal components of deformation. Presented work includes training and verification of the DGD-NODE constitutive model using simulations of synthesized microstructures representative of an AM metal, and subsequent application of the constitutive model in AM process modeling simulations using the Multiphysics Object Oriented Simulation Environment (MOOSE) finite element solver. |
Proceedings Inclusion? |
Undecided |