燃料棒包壳辐照蠕变与生长行为模拟研究

摘要

According to the cladding material and the behavior model,the simulation study of cladding irradiation creepand growth behavior has been conducted using the ABAQUS.In a steady state condition,the irradiation creep of the cladding has been calculated and the relationship between stress and creep has also been analyzed.We have set up collection of nodes and different paths to analyze the irradiation growth phenomenon of the cladding,indicating ABAQUS is applicable in the nuclear fuelling performance research.And using ABAQUS secondary development interface to combine custom model with commercial finite element software,the commercial finite element software is able to solve problems quickly in the analog part of the nuclear fuel.%根据建立的包壳材料和行为模型,利用ABAQUS对包壳辐照蠕变与生长行为进行相关模拟研究.在设定的稳态工况下,计算了包壳的辐照蠕变,分析了它的应力以及蠕变的关系.通过设置节点集和不同路径方式,分析了包壳的辐照生长现象,表明了ABAQUS在核燃料性能研究方面的适用性.以及利用ABAQUS的二次开发接口,可以把自定义的模型结合到商用的有限元软件中,利用商用有限元软件的优势,快速解决部分核燃料模拟中的问题.