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Strength and Fatigue Analysis of Tube-Sheet Subjected to Thermal Shock

[+] Author Affiliations
Jun Shen, Yanfang Tang, Juncheng Xu

Wison Engineering Co., Ltd., Shanghai, China

Yinghua Liu

Tsinghua University, Beijing, China

Paper No. PVP2016-63110, pp. V003T03A001; 8 pages
doi:10.1115/PVP2016-63110
From:
  • ASME 2016 Pressure Vessels and Piping Conference
  • Volume 3: Design and Analysis
  • Vancouver, British Columbia, Canada, July 17–21, 2016
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5039-8
  • Copyright © 2016 by ASME

abstract

A calculation model for a tube-sheet under thermal shock loading with the finite element code ANSYS is established in this paper. A three-dimensional finite element model is established to simulate thermal shock process in order to obtain temperature and stress distributions of the structure. The duration time of the thermal shock is taken as about ten seconds and thermal cycling numbers are more than 1000 times for the whole service life of the structure. In order to capture accurate temperature and stress profile of this structure, thermo-mechanical coupling approach and transient thermal analysis is used. Temperature and stress distribution are obtained under the given thermal boundary conditions at different time points and it is also easy to get the stress amplitude of the other points in this structure between any two time points. According to the numerical results, the stress induced by thermal shock changes with time and its magnitude and amplitude cannot be ignored. Strength and fatigue evaluations are also performed according to ASME VIII-2 to ensure its safety.

Copyright © 2016 by ASME

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