基于内聚力模型的气波机振荡管T型钎焊接头峰值载荷分析  

Peak Load Analysis of T-typed Brazed Joint of Oscillating Tube in Gas Wave Machine Based on Cohesive Zone Model

作　　者：陈其中 邬岳伟 邢爱冬 李庆生[1] CHEN Qi-zhong;WU Yue-wei;XING Ai-dong;LI Qing-sheng(School of Mechanical and Power Engineering,Nanjing Tech University)

机构地区：[1]南京工业大学机械与动力工程学院

出　　处：《化工机械》2023年第2期226-231,共6页Chemical Engineering & Machinery

基　　金：国家重点研发计划项目(2018YFA0704604)。

摘　　要：基于内聚力模型开发VUMAT子程序,用于气波机钎焊接头界面峰值载荷分析。根据拉伸剥离试验确定T型钎焊接头试样的临界内聚能,分析焊缝缺陷对峰值载荷的影响。结果表明:T型钎焊接头试样的临界内聚能为25 mJ/mm2。通过对焊缝缺陷模型的分析,发现峰值载荷随着焊缝缺陷长度的增加而减小,随焊缝缺陷沿x轴正方向位置[0 mm→5 mm→10 mm]逐渐增大。故为保证钎焊质量,焊缝缺陷不宜出现在T型钎焊接头试样前端部位。In the paper,having the cohesive zone model based to develop VUMAT subroutine was implemented to analyze the interface peak load of gas wave brazed joints,including having tensile peel test based to determine specimen’s cohesive energy of T-typed brazed joints and to analyze influence of weld defects on the peak load.The results show that,the cohesive energy of T-typed brazed joints is 25 mJ/mm2.Analyzing three weld defect models shows that,the peak load decreases with the increase of weld defect’s length and increases with the change of the position of the weld defect along X-axis’positive direction[0 mm→5 mm→10 mm]gradually,for purpose of ensuring brazing quality,the weld defect appeared at the front end of the T-typed brazed joint specimen have to be prevented.

关 键 词：T型钎焊接头试样 内聚力模型 VUMAT 峰值载荷 焊缝缺陷 

分 类 号：TH131.2[机械工程—机械制造及自动化]