|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Ceramic Materials for Nuclear Energy Research and Applications
||A Thermo-mechanical Coupled Phase Field Dynamic Fracture Model and Its Application in UO2
||Shuaifang Zhang, Wen Jiang, Michael R. Tonks
|On-Site Speaker (Planned)
Fuel fragmentation has been paid a lot of attention in recent years, because fragmentation significantly impacts reactor safety during an accident. The phase field method has been developed as a powerful tool to capture fracture. In this talk, we present a thermo-mechanical phase field model of dynamic fracture that has been developed for fuel fragmentation. The model includes the impact of elastic anisotropy and has been validated using several benchmark simulations compared with other simulation and experimental results. After the verification and validation of this model, we then apply this model to simulate the crack behaviors of UO2, where we use the anisotropic elastic constants and adjust the fracture parameters to match the crack stress of UO2. Finally, we simulate fuel fragmentation with the impact of bubbles and grain boundaries.
||Ceramics, Computational Materials Science & Engineering, Modeling and Simulation