文献类型：期刊文献

英文题名：Failure mechanisms transition of hydrogenation reactor: from creep-fatigue to creep-ratcheting

作者：Bai, Xiaoxiang[1];Wang, Xaoxiao[1];Chen, Haofeng[1,2];Xuan, Fuzhen[1];Jia, Guodong[3]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety DOE, Shanghai 200237, Peoples R China;[2]Shanghai Inst Aircraft Mech & Control, Shanghai, Peoples R China;[3]China Special Equipment Inspect & Res Inst, 2 Bldg,Xiyuan,Heping Rd, Beijing 100029, Peoples R China

年份：2026

卷号：219

外文期刊名：INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING

收录：;EI(收录号：20253719128086);WOS:【SCI-EXPANDED(收录号:WOS:001582929700001)】；

基金：The authors gratefully acknowledge the supports from the National Key R & D Program of China (2023YFF0614903) , the National Natural Science Foundation of China (52375145) , the China Postdoctoral Sci-ence Foundation (2023TQ0119, 2024M760909 and GZC20240467) , and the Shanghai Pujiang Program (No. 24PJD026) .

语种：英文

外文关键词：Hydrogenation reactor; Creep-fatigue interaction; Linear matching method framework; Creep-ratcheting failure

摘要：The hydrogenation reactor is one of the crucial pressure vessels in the petroleum refining and coal chemical industry, which is exposed to the complicated combinations of' elevated temperature environments, highpressure conditions, and long creep dwell during service, resulting in the interaction between low-cycle fatigue (LCF) and creep. In this study, the extended Direct Steady Cyclic Analysis (eDSCA) procedure under the Linear Matching Method Framework (LMMF) is utilised to perform an in-depth analysis of the structural creepfatigue behaviours of the hydrogenation reactors. The results indicate that as the stress-strain hysteresis curves evolve from closed to open states, there emerges a transition in the failure mechanism of the hydrogenation reactor from creep-fatigue to creep-ratcheting. Moreover, with increasing mechanical load and prolonged creep dwell time at loading points within the cyclic plastic zone, the location of maximum creep strain shifts from the outer wall to the inner wall of the nozzle, eventually migrating toward the junction between the nozzle and the vessel. The findings of this study facilitate understanding of the creep-fatigue failure in terms of pressure vessels and, hence, improve the accuracy of life prediction for hydrogenation reactors.