文献类型：期刊文献

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

作者：Cho, Nak-Kyun[1,3];Wang, Run-Zi[2];Ma, Zhiyuan[1];Chen, Haofeng[1,2];Xuan, Fu-Zhen[2]

机构：[1]Univ Strathclyde, Dept Mech & Aerosp Engn, Glasgow G1 1XJ, Lanark, Scotland;[2]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[3]Engn Anal Serv Ltd, Altrincham WA14 5GL, WA, England

年份：2019

卷号：161

外文期刊名：INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES

收录：;EI(收录号：20193107259488);WOS:【SCI-EXPANDED(收录号:WOS:000496863500037)】；

基金：The authors gratefully acknowledge the supports from the National Natural Science Foundation of China (51828501), the Higher Education Discipline Innovation Project (111 Project) under the funding code B13020, University of Strathclyde and East China University of Science and Technology during the course of this work. The authors also express deep gratitude to Engineering Analysis Service Limited who provides a technical report regarding the creep-fatigue crack initiation assessment of the tube plate. Finally many thanks go to Mr Michael William Spindler of EDF energy for his advices on the creep damage models in this work.

语种：英文

外文关键词：Superheater; Non-isothermal; Multi-dwell; Creep-cyclic plasticity; Creep-fatigue damage

摘要：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.