Abstract In this study, a three-dimensional bi-directional fluid-solid coupling method FLUENT-ABAQUS-MpCCI was used to analyze the behavior of the fuel plate. ABAQUS was used to simulate the solid domain, including the heat conduction, mechanical behavior and irradiation effects. Several subroutines were developed and validated, including CREEP, UHARD, USDFLD and UEXPAN. FLUENT was used to simulate the fluid domain, including pressure and temperature. FLUENT and ABAQUS were coupled by MpCCI to consider the interaction between fluid domain and solid domain. Many parameters were obtained, including fluid temperature distribution, Mises stress distribution and strain distribution. The influences of the fluid domain, particle volume fraction, creep behavior and burnup were analyzed. The results showed that the zero-dimensional model or one-dimensional model on fluid could not accurately simulate the mechanical behavior of the fuel plate. The results also showed that the creep behavior could reduce the Mises stress on the cladding.

中文翻译：

---

基于流固耦合法的分散板式燃料行为分析

摘要 本研究采用三维双向流固耦合方法FLUENT-ABAQUS-MpCCI对燃料板的行为进行分析。ABAQUS 用于模拟固体域，包括热传导、机械行为和辐射效应。开发并验证了几个子程序，包括 CREEP、UHARD、USDFLD 和 UEXPAN。FLUENT 用于模拟流体域，包括压力和温度。FLUENT 和 ABAQUS 通过 MpCCI 耦合来考虑流体域和固体域之间的相互作用。获得了许多参数，包括流体温度分布、Mises 应力分布和应变分布。分析了流体域、颗粒体积分数、蠕变行为和燃耗的影响。结果表明，流体的零维模型或一维模型不能准确模拟燃料板的力学行为。结果还表明，蠕变行为可以降低包层上的米塞斯应力。