压力容器2025，Vol.42Issue(4)：9-15,7.DOI:10.3969/j.issn.1001-4837.2025.04.002
拉伸位移作用下高温波形膨胀节疲劳裂纹扩展研究
Research on fatigue crack propagation of bellows expansion joints at high temperature under tensile displacements
摘要
Abstract
To explore the crack fatigue propagation behavior of bellows expansion joints under high temperature,this paper takes the bellows expansion joints under high temperature as an object to study its crack damage failure.Firstly,the fracture mechanics analysis and evaluation technique was introduced.Under 400℃high temperature,the fatigue crack propagation test under tension cycle displacement was carried out to simulate the crack failure process of expansion joints in engineering practice;Secondly,based on the same condition,the numerical simulation analysis of fatigue crack propagation was carried out.The results show that the relative error of cycle number obtained by simulation and experiment is within 50%,which is far less than 2 times of fatigue life error band.The reliability of simulation model is verified.This study provides an reference for fracture failure analysis of high temperature bellows expansion joints in engineering.关键词
波形膨胀节/疲劳裂纹扩展/高温Key words
bellows expansion joints/fatigue crack propagation/high temperature分类
机械制造引用本文复制引用
房勇兴,李慧芳,吴志伟,李张治,田明明,钱才富..拉伸位移作用下高温波形膨胀节疲劳裂纹扩展研究[J].压力容器,2025,42(4):9-15,7.基金项目
国家重点研发计划项目(2023YFC3010500) （2023YFC3010500）
