Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2020, Vol. 31 ›› Issue (5): 51 doi: 10.1007/s41365-020-00761-2

• NUCLEAR ENERGY SCIENCE AND ENGINEERING • Previous Articles     Next Articles

Numerical simulation of stress behavior of dowel-brick structures in TMSR

Hui-Qing Fan, Chao-Chao Huang, Xiao Wang, D.K.L. Tsang, Xiao-Chun Zhang, Xiao-Yan Wang, Shi-Feng Zhu   

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2019-12-25 Revised:2020-03-11 Accepted:2020-03-11
  • Contact: Xiao-Chun Zhang E-mail:zhangxiaochun@sinap.ac.cn
  • Supported by:
    This work was supported by the Strategic Priority Research Program of the Chinese Academy of Sciences (No. XDA02010000).
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Hui-Qing Fan, Chao-Chao Huang, Xiao Wang, D.K.L. Tsang, Xiao-Chun Zhang, Xiao-Yan Wang, Shi-Feng Zhu. Numerical simulation of stress behavior of dowel-brick structures in TMSR.Nuclear Science and Techniques, 2020, 31(5): 51     doi: 10.1007/s41365-020-00761-2
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Abstract: As essential elements of the graphite reflector in thorium-based molten salt reactor (TMSR), dowel-brick structures are used to withstand complex working loads in the reactor core and their failure may lead to serious damage of the graphite reactor core. It is crucial to investigate the stress behavior of dowel-brick structures for safe operation of the graphite reactor. In this study, three groups of finite element analyses (FEA) and a strain test were carried out to investigate how the geometric parameters of the dowels affect the stress behavior of the dowel-brick structure. The numerical results indicate that the stress behavior of a dowel-brick structure is significantly affected by the diameter, length, and aspect ratio of the dowels. The maximum stress in the lower and upper bricks decreases with increase of the dowel length. The location of maximum stress on both lower and upper bricks shifts from the root of the socket to the edge of that socket beside the contact region, as the length of the dowel increases. The shift of the maximum stress location occurs earlier for the upper bricks than for the lower bricks. The results of strain tests show good agreement with those of numerical analyses.

Key words: Dowel-brick structure, FEA, Stress behavior, Strain test