文献类型：期刊文献

英文题名：On the elastic-plastic behaviors of centrifugal steam compressor impeller under cyclic thermomechanical loading

作者：Li, Jianxun[1];Wang, Xiaoxiao[2];Ma, Zhiyuan[3];Lu, Kai[4];Chen, Haofeng[2];Wang, Weiqiang[1,5]

机构：[1]Shandong Univ, Natl Demonstrat Ctr Expt Mech Engn Educ, Engn & Technol Res Ctr Special Equipment Safety Sh, Sch Mech Engn, Jinan, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China;[3]Hohai Univ, Coll Mech & Mat, Ctr Numer Simulat Software Engn & Sci, Nanjing, Peoples R China;[4]Fuzhou Univ, Coll Chem Engn, Fuzhou, Peoples R China;[5]Qingdao Univ Sci & Technol, Coll Electromech Engn, Qingdao, Peoples R China

年份：2024

卷号：47

期号：8

起止页码：2888

外文期刊名：FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES

收录：;EI(收录号：20242116125332);WOS:【SCI-EXPANDED(收录号:WOS:001227480400001)】；

基金：This work is supported by the National Natural Science Foundation of China (52275154 and 52375145) and the National Key R&D Program of China (Grant No. 2023YFF0614903). The authors gratefully acknowledge the support provided by East China University of Science and Technology and Shandong University Testing and Manufacturing Center for Advanced Materials.

语种：英文

外文关键词：impeller; linear matching method; low cycle fatigue; ratchet limit; shakedown limit

摘要：In this paper, the cyclic elastic-plastic behaviors of the centrifugal steam compressor impeller (CSCI) structure under practical operating conditions are discussed employing the linear matching method (LMM). The three-stage strategy of the LMM is employed to determine the shakedown and ratchet boundaries by conducting a series of iterative direct steady cyclic analysis, and based on this, the load regions corresponding to different types of damage behavior that may occur during the operation are identified. Computational results reveal slight contraction in the structural response diagram when considering actual material constitutive relationships, compared to ideal elastic-plastic models. Meanwhile, by integrating the unified ratchet and fatigue program with fatigue experimental data, a series of constant low-cycle fatigue life curves has been presented for different service conditions. Furthermore, a comparison with detailed step-by-step inelastic analyses confirms the applicability and great efficiency of the LMM in practical engineering problems. The cyclic elastic-plastic behavior of impeller were investigated using the three-stage procedure. The effect of temperature-dependent and strain hardening on structural response of impeller were evaluated. The constant low-cycle life fatigue curves of the impeller structure were generated. The applicability and great efficiency of linear matching method have been confirmed.