文献类型：期刊文献

英文题名：Creep rupture limit analysis for engineering structures under high-temperature conditions

作者：Wang, Xiaoxiao[1];Ma, Zhiyuan[1];Chen, Haofeng[1,2];Liu, Yinghua[3];Shi, Duoqi[4];Yang, Jie[5]

机构：[1]Univ Strathclyde, Dept Mech & Aerosp Engn, James Weir Bldg,75 Montrose St, Glasgow G1 1XJ, Scotland;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[3]Tsinghua Univ, Dept Engn Mech, Beijing 100084, Peoples R China;[4]Beihang Univ, Sch Energy & Power Engn, Beijing 100191, Peoples R China;[5]Univ Shanghai Sci & Technol, Sch Energy & Power Engn, Shanghai 200093, Peoples R China

年份：2022

卷号：199

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

收录：;EI(收录号：20223312577182);WOS:【SCI-EXPANDED(收录号:WOS:000855531700002)】；

基金：The authors gratefully acknowledge the support from the Royal Society, the National Natural Science Foundation of China (51828501, 52150710540 and 51911530201) , the East China University of Science and Technology and the University of Strathclyde during the course of this work.

语种：英文

外文关键词：Creep rupture; LMM; Damage model; Isochronous stress -strain curve

摘要：The efficient and accurate prediction of creep rupture limit poses a huge challenge for high-temperature engi-neering such as aerospace, nuclear and chemical industries. It is important to investigate the applicability of mainstream assessment approaches and related creep rupture failure mechanisms through theoretical and nu-merical views. In this study, major creep rupture assessment techniques are comparatively investigated for the first time, including the isochronous stress-strain (ISS) curve-based creep rupture limit analysis, the Omega creep damage model-based creep analysis and the direct method-based creep rupture assessment by an extended Linear Matching Method (LMM). New virtual creep test curves are generated from the Omega creep model and chosen as the unified creep source data to derive the key material parameters used for different methods. For proposing a reasonable strategy for evaluating high-temperature structures in terms of creep rupture, the balance between computational efficiency and accuracy is comprehensively analyzed. Through a practical engineering application of a high-temperature pressure vessel component, a profound insight into the techniques of creep rupture evaluation is delivered from different views. Moreover, several assessment curves are built based on a new understanding of creep rupture failure mechanism, with an effective numerical plan to validate the creep rupture boundary illustrated. It is demonstrated that the LMM direct creep rupture analysis is more suitable for calcu-lating the structural creep rupture limit, with both monotonic and cyclic load conditions considered.