Simulation of the irradiation-induced thermo-mechanical behaviors evolution in monolithic U-Mo/Zr fuel plates under a heterogeneous irradiation condition

作     者：Zhao, Yunmei Gong, Xin Ding, Shurong 

作者机构：Fudan Univ Dept Mech & Engn Sci Shanghai 200433 Peoples R China 

出 版 物：《NUCLEAR ENGINEERING AND DESIGN》 (核工程与设计)

年 卷 期：2015年第285卷

页      面：84-97页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 

基　　金：Natural Science Foundation of China [11172068, 91226101, 11272092, 11072062, 91026005, 11304324] Research Fund for the Doctoral Program of Higher Education of China Strategic Priority Research Program" of the Chinese Academy of Sciences [XDA03030100] 

主　　题：Monolithic plate Irradiation swelling and creep Irradiation growth Stress update algorithm Co-rotational coordinate system 

摘      要：For monolithic fuel plates with U-Mo foil and Zircalloy cladding, the three-dimensional large deformation incremental constitutive relations and stress update algorithms in the co-rotational coordinate framework are developed for the fuel and cladding with their respective irradiation effects involved. Three-dimensional finite element simulation of their in-pile thermo-mechanical coupling behaviors under a location-dependent irradiation condition is implemented via the validated user-defined subroutines UMATHT and UMAT in ABAQUS. Comparison of the simulation results for two cases with or without creep considered in the U-Mo foil indicates that with the irradiation creep included (1) considerable stress-relaxation appears in the U-Mo foil, and the mechanical interaction between fuel and cladding is weakened;(2) approximately identical thickness increments in the plate and fuel foil exist and become comparably larger;(3) plastic deformation in the cladding is significantly diminished. (C) 2015 Elsevier B.V. All rights reserved.