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Creep Analysis for Pressurized Components Under Creep Conditions Based on Isochronous Stress-Strain Curve and Elastic-Perfectly Plastic Material Model

[+] Author Affiliations
Qi-Wei Xia, Jian-Guo Gong, Fu-Zhen Xuan

East China University of Science and Technology, Shanghai, China

Paper No. PVP2018-84265, pp. V01BT01A026; 6 pages
doi:10.1115/PVP2018-84265
From:
  • ASME 2018 Pressure Vessels and Piping Conference
  • Volume 1B: Codes and Standards
  • Prague, Czech Republic, July 15–20, 2018
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5159-3
  • Copyright © 2018 by ASME

abstract

This work is to address the creep analysis for components at elevated temperatures based on isochronous stress-strain curve and the elastic-perfectly plastic material model through numerical analyses. Numerical results presented that the creep deformation is very sensitive to the target inelastic strain chosen for analysis. A small inelastic strain, corresponding to a small yield stress, can cause very conservative result for the case studied. Moreover, the target inelastic strain, corresponding to the minimum inelastic strain along with the given path, is different from each other for various internal pressures.

Copyright © 2018 by ASME

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