文献类型：期刊文献

英文题名：Shakedown and creep rupture analysis of printed circuit heat exchangers based on the linear matching method framework

作者：Ma, Zhiyuan[1];Fu, Zhuojia[1,2];Chen, Haofeng[3,4];Wang, Xiaoxiao[3]

机构：[1]Hohai Univ, Coll Mech & Mat, Ctr Numer Simulat Software Engn & Sci, Nanjing 211100, Peoples R China;[2]Leibniz Univ Hannover, Inst Continuum Mech, D-30167 Hannover, Germany;[3]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety DOE, Shanghai 200237, Peoples R China;[4]Univ Strathclyde, Dept Mech & Aerosp Engn, Glasgow G1 1XJ, Scotland

年份：2024

卷号：233

外文期刊名：FINITE ELEMENTS IN ANALYSIS AND DESIGN

收录：;EI(收录号：20240615521398);WOS:【SCI-EXPANDED(收录号:WOS:001179206400001)】；

基金：The authors gratefully acknowledge the supports from Eoin Reilly of University of Strathclyde, the National Natural Science Foundation of China (52150710540, 52375145) , Hohai University, East China University of Science and Technology and University of Strathclyde during the course of this work.

语种：英文

外文关键词：Creep rupture; Direct methods; Finite element analysis; PCHE; Cyclic loading

摘要：In the field of nuclear engineering, Printed Circuit Heat Exchangers (PCHEs) have become increasingly popular and the structural integrity assessment of these key power plant components is crucial. As part of the structural integrity assessment, creep rupture analysis considers the interaction of cyclic plasticity and creep behaviour, which is vital for components subjected to cyclic thermal-mechanical loads. The Linear Matching Method (LMM) framework has included a creep rupture module based on an extended shakedown algorithm, which has been adopted by several researchers. However, the current LMM framework mainly relies on linear extrapolation and requires users to provide a large amount of data points to estimate the rupture stress. This paper introduces a Unified Creep Rupture Equation (UCRE) for characterizing the creep rupture curves of diverse steel types. The UCRE is implemented in an extended shakedown algorithm and integrated into the LMM framework. The numerical method is validated through a comparative analysis, wherein the estimated rupture curves are compared with those provided in the ECCC data sheet, as well as against alternative numerical models. Shakedown and creep rupture analyses are then performed on a PCHE core. The proposed method facilitates the parametric study of changing materials and the process of material selection. Various geometric configurations are also considered and the proposed unitary cell model is verified by comparing the results with ones from full FE models. The UCRE has been proved to be an accurate engineering tool for the prediction of rupture strengths while the LMM framework has gained improved usability and versatility for engineering applications.