轻工机械2024，Vol.42Issue(3)：46-53,8.DOI:10.3969/j.issn.1005-2895.2024.03.007
基于内聚力模型的气波机振荡管304对接钎焊接头拉伸强度研究
Research on Tensile Strength of 304 Butt Brazed Joint of Oscillating Tube of Gas-Wave Machine Based on Cohesive Zone Model
摘要
Abstract
The core components of the oscillating tube are brazed,and the tensile property of the brazed joint has an important influence on the structural strength of the gas-wave machine.In order to investidate the process of interfacial crack propagation of brazed joint,according to the brazed structure of the oscillating tube of the gas-wave machine,the tensile test of 304 butt brazed joint sample prepared was carried out,and the fracture showed ductile fracture by analyzing the tensile fracture morphology.Based on the cohesion model,the VUMAT subroutine was developed and finite element analysis was carried out.The simulated fracture load was 5 039 N,the test value was 5 242 N,and the error of both was 3.9%,which verified the accuracy of the simulation.The results show that the cohesion model can well simulate the crack initiation and propagation process of the brazed joint of the oscillating tube of the gas-wave machine.On this basis,the effect of weld defects on the fracture load of brazed joint is studied,and it is found that the damage rate of cohesive force unit at the defect is accelerated,which results in a significant decrease in the fracture load.关键词
气波机/振荡管/对接钎焊接头/内聚力模型/VUMAT子程序/焊缝缺陷Key words
gas-wave machine/oscillating tube/butt brazed joint/cohesive zone model/VUMAT subroutine/weld defect分类
机械制造引用本文复制引用
邢爱冬,张永乐,李庆生..基于内聚力模型的气波机振荡管304对接钎焊接头拉伸强度研究[J].轻工机械,2024,42(3):46-53,8.基金项目
国家重点研发计划项目(2018YFA0704604). （2018YFA0704604）
