Peridynamics modelling of the interface behaviour of TRISO coated particle fuel

利用abaqus实现的基于键合的periddynamics模型，该项目的目标是更深入地了解TRISO包覆颗粒燃料的失效机制，特别是关于颗粒三层保护界面的裂纹扩展。该项目首先对TRISO的制造过程进行了介绍性的有限元分析，以揭示可能影响其在反应堆中的行为的残余应力。其次，以双材料陶瓷试样为例，进行了3点弯曲试验，验证了围动力界面模型的有效性。最后，研究将集中在TRISO粒子在真实环境中的模拟，并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