文献类型：期刊文献

英文题名：A direct approach to the evaluation of structural shakedown limit considering limited kinematic hardening and non-isothermal effect

作者：Ma, Zhiyuan[1];Chen, Haofeng[1,2];Liu, Yinghua[3];Xuan, Fu-Zhen[2]

机构：[1]Univ Strathclyde, Dept Mech & Aerosp Engn, James Weir Bldg,75 Montrose St, Glasgow G1 1XJ, Lanark, Scotland;[2]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[3]Tsinghua Univ, Dept Engn Mech, Beijing 100084, Peoples R China

年份：2020

卷号：79

外文期刊名：EUROPEAN JOURNAL OF MECHANICS A-SOLIDS

收录：;EI(收录号：20194307578563);WOS:【SCI-EXPANDED(收录号:WOS:000501415600010)】；

基金：The authors gratefully acknowledge the supports from Professor A.R. S Ponter of University of Leicester, 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.

语种：英文

外文关键词：Direct method; Shakedown analysis; Limited kinematic hardening; Temperature dependence; Linear matching method

摘要：This paper presents a novel direct method for the structural shakedown analysis considering limited kinematic hardening and non-isothermal effect. The Melan's static shakedown theorem is extended to consider limited kinematic hardening material and implemented into the Linear Matching Method (LMM) shakedown module. Instead of using a specific kinematic hardening rule and an explicit back stress field, the general nonlinear hardening laws are considered by using a two-surface hardening model. A two-stage procedure is developed in the extended LMM algorithm, which can generate the limited hardening shakedown envelope and the unlimited hardening curve efficiently and accurately. Also, the material non-isothermal effect is considered during the computation process of the shakedown limit by proposing a temperature-dependent hardening factor, in place of a constant and fictitious one. To validate the extended LMM method, a numerical test on a thin cylinder pipe with temperature-independent material properties is performed, and the results match well with ones from literature. Then, a numerical study on a typical aero-engine turbine disk is conducted to investigate the influence of temperature-dependent material properties and operating conditions. Several shakedown curves considering kinematic hardening effect are derived and adequately discussed. As a result, the extended LMM shakedown module is proven to be a robust, efficient and versatile tool for practical industrial problems.