About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Algorithms Development in Materials Science and Engineering
|
Presentation Title |
Microstructure-sensitive surrogate modeling of viscoplastic creep in nuclear fuel cladding: a mechanism-based, data-driven approach |
Author(s) |
Andre P. Ruybalid, Ryan Sweet, Laurent Capolungo |
On-Site Speaker (Planned) |
Andre P. Ruybalid |
Abstract Scope |
Safe operation of nuclear reactor materials requires precise mechanical simulations capturing the evolution of microstructure and deformation mechanisms. This talk discusses surrogate constitutive models for quick, microstructure-aware finite element analysis of cladding materials in light water reactors.
Applied to ferritic/martensitic steel and Zircaloy-4, polycrystal simulations with a mechanistic viscoplasticity model are used to synthesize viscoplastic response databases. These databases span various internal state variables, such as dislocation density and precipitate content, under different loading conditions, including creep, monotonic and cyclic loading, and irradiation to probe a wide range of mechanical behaviors. Response surface surrogates are then calibrated with this database to establish polynomial input/output relationships for rapid evaluation.
The surrogates are integrated into a finite element framework to simulate realistic scenarios, including integral fuel-cladding interactions, while maintaining a connection to the evolving microstructure. |
Proceedings Inclusion? |
Planned: |
Keywords |
Computational Materials Science & Engineering, Modeling and Simulation, ICME |