Study on frictional behavior of SiC_(f)/SiC composite clad tube clamping condition under nuclear irradiation  

作　　者：Chenglong XIAO Liangliang SHEN Tianqi ZHU Jianbo TANG Ximing XIE Xinyu FAN Jian XU Zhiying REN 

机构地区：[1]School of Mechanical Engineering,Zhejiang University of Technology,Hangzhou,310023,China [2]Engineering Laboratory of Advanced Energy Materials,Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences,Ningbo,315201,China [3]State Key Laboratory of Fine Chemicals,Liaoning High-Performance Polymer Engineering Research Center,School of Chemical Engineering,Dalian University of Technology,Dalian,116024,China [4]School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou,350116,China [5]School of Computer Science and Technology,Shandong University,Qingdao,266237,China [6]Aviation Industry Corporation of China,Ltd.,Beijing,100028,China

出　　处：《Friction》2024年第5期919-938,共20页摩擦（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.52075526);the“Ningbo 3315 Plan Innovation Team”(Grant No.2017A-28-C);the National Natural Science Foundation of China(Grant No.91860204);the Fundamental Research Funds for the Central Universities(Grant No.DUT22LAB605);the National Key R&D Program of China(Grant No.2018YFB1107500).

摘　　要：Silicon carbide fiber reinforced silicon carbide matrix(SiC_(f)/SiC)composite is the key cladding material of nuclear fuel,which determines the safety and reliability of nuclear fuel storage and transportation.The replacement of its storage and transportation scenario needs to be completed by the manipulator,but the application of SiC_(f)/SiC wear,fracture,and nuclear leakage in the snatching process of brittle-flexible-rigid contact in the irradiation environment has been seriously restricted due to unclear understanding of the damage mechanism.Therefore,the effects of irradiation dose and clamping load on the friction characteristics of the contact interface between SiC_(f)/SiC clad tube are studied in this paper,and the effects of irradiation parameters and clamping force on the static friction coefficient of the contact interface between the clad tube and flexible nitrile are obtained.Based on the Greenwood-Williamson tribological model,a numerical model of the shape and structure of the contact micro-convex at the micro-scale of the clamping interface is constructed by introducing the multi-surface integral,and finally verified by experiments.The research results show that there is a unique“Irradiation suppression zone”under the clamping condition of SiC_(f)/SiC cladding tube under the nuclear irradiation environment,and the growth of static friction coefficient slows down until stagnates after irradiation reaches a certain extent(600 kGy),and there will be a decline when the irradiation dose continues to increase,among which the clamping force of 15.2 N within the irradiation interval of 1,000 kGy can meet the safety of nuclear environment operation.The results of this paper can provide an important theoretical basis and application guidance for the safe operation of SiC_(f)/SiC cladding tubes in the storage and transportation clamping process.

关 键 词：SiC_(f)/SiC Clad tube nuclear irradiation conditions Greenwood-Williamson tribological model multi-surface integral 

分 类 号：TH117[机械工程—机械设计及理论]