Creep-fatigue endurance of a superheater tube plate under non-isothermal loading and multi-dwell condition

Cho, Nak-Kyun and Wang, Run-Zi and Ma, Zhiyuan and Chen, Haofeng and Xuan, Fu-Zhen (2019) Creep-fatigue endurance of a superheater tube plate under non-isothermal loading and multi-dwell condition. International Journal of Mechanical Science, 161-162. 105048. ISSN 0020-7403 (https://doi.org/10.1016/j.ijmecsci.2019.105048)

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Abstract

Raising the operating temperature to increase electricity production in the nuclear power industry is a practical solution in the aspect of efficiency and emissions reduction. However, regarding structural integrity, such high temperature has a significant impact on the life of nuclear power plant components. The superheater tube plate is one of the most critical parts under exposures of very high temperature in the boiler system of the power plant. This study investigates creep-cyclic plasticity behaviour of a superheater outlet tube plate under extremely sophisticated thermo-mechanical loading and evaluates creep-fatigue damage endurance, using the modified LMM eDSCA. Temperature-dependent material properties are employed to calculate more practicable structural behaviour and lifetime prediction. The results clearly present the criticality of the effects of non-isothermal loading and multiple dwells on the structural integrity of the tube plate. Also, this study clarifies critical factors that cause dominant damage to the tube plate by providing total damages using various damage assessment models, of which results show the trend of the conservativeness of each damage assessment model, compared to experiment result.

ORCID iDs

Chen, Haofeng ORCID: https://orcid.org/0000-0001-6864-4927

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  Item type:	Article
  ID code:	69099
  Dates:	Date Event 31 October 2019 Published 28 July 2019 Published Online 28 July 2019 Accepted
  Subjects:	Technology > Mechanical engineering and machinery
  Department:	Faculty of Engineering > Mechanical and Aerospace Engineering Strategic Research Themes > Ocean, Air and Space
  Depositing user:	Pure Administrator
  Date deposited:	29 Jul 2019 13:22
  Last modified:	12 Dec 2024 08:24
  URI:	https://strathprints.strath.ac.uk/id/eprint/69099