Peridynamics modelling of the interface behaviour of TRISO coated particle fuel

利用ABAQUS实现的基于键的动力学模型，本项目的目的是更深入地了解Triso涂层颗粒燃料的失效机理，特别是关于通过颗粒三层保护层界面的裂纹扩展。项目首先对Triso的制造过程进行有限元分析，以揭示可能影响其在反应堆中行为的残余应力。其次，对双材料陶瓷试件进行三点弯曲试验的简化情况下，对PeridyDynamics界面模型进行了验证。最后，研究将集中在真实环境中对Triso颗粒的模拟。有可能与实验数据进行比较

Using an ABAQUS-implemented bond-based Peridynamics model, the goal of this project is to provide a deeper understanding of the failure mechanisms of TRISO coated particle fuel, especially regarding the crack propagation through the interfaces of the 3 layers of protection of the particle.The project started with an introductory Finite Elements analysis of the fabrication process of TRISO to unveil possible residual stresses that could affect its behaviour in the reactor.Secondly, a validation of the Peridynamics interface model has been performed on a simplified case of a bi-material ceramic specimen undergoing a 3-point-bend test.Finally the research will focus on the simulation of TRISO particles in real settings, with a possible comparison to experimental data