摘要
为了研究低温环境对栓钉焊接残余应力分布规律的影响,通过ABAQUS建立栓钉模型进行数值模拟,考虑了5个不同的温度进行有限元热-固耦合分析。结果表明:Mises应力、径向残余应力最大值均位于焊缝附近10 mm处,随着距离的增加迅速衰减;环向残余应力在焊缝附近为残余拉应力,远离焊缝处为残余压应力,最大值位于焊缝中心;低温会提高焊接残余应力,Mises应力集中表现在焊缝中心,环向残余应力集中表现在焊缝附近,径向残余应力在焊缝中心及焊缝附近均有所增加。低温对提高焊接残余拉应力影响明显,对残余压应力影响不大。
In order to study the influence of low temperature environment on the distribution law of welding residual stress,a stud model through ABAQUS for numerical simulation was established,and 5 different temperatures for finite element thermal-solid coupling analysis were considered.The results show that the maximum values of mises stress and radial residual stress are both located at 10 mm near the weld,and decay rapidly with the increase of distance;the hoop residual stress is residual tensile stress near the weld,and is compressive stress away from the weld,and the maximum value is located in the center of the weld;low temperature will increase the residual stress of the weld,the mises stress is concentrated in the center of the weld,the hoop residual stress is concentrated near the weld,and the radial residual stress increases both in the center of the weld and near the weld.The low temperature has a significant effect on increasing the residual tensile stress of welding,but has little effect on the residual compressive stress.
作者
卫星
高亚杰
康志锐
刘宇辰
赵骏铭
肖林
WEI Xing;GAO Ya-jie;KANG Zhi-rui;LIU Yu-chen;ZHAO Jun-ming;XIAO Lin(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)
出处
《吉林大学学报(工学版)》
EI
CAS
CSCD
北大核心
2024年第1期198-208,共11页
Journal of Jilin University:Engineering and Technology Edition
基金
国家自然科学基金项目(52078424,52178170)
蜀道投资集团科技计划项目(SRIG2020GG0001)
中铁第五勘察设计院集团有限公司科技研究计划项目(T5Y2020-B03)。
关键词
桥梁工程
栓钉
低温
温度场
残余应力
数值模拟
bridge engineering
stud
low temperature
temperature field
residual stress
numerical simulation