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Numerical Simulation of Multi-repaired Weld Residual Stress
作者姓名:ZHUYuan-xiang  ZHAOXue-rong  ZHANGXiao-fei  HULun-ji
作者单位:[1]HuazhongUniversityofScienceandTechnology [2]WuhanUniversity
基金项目:FundedbytheNationalNaturalScienceFoundationofChi na (No .5 0 3340 5 0 )
摘    要:In order to understand the change regulation of resichual stress during muhi-repaired uelding to provide theoretical guidance for correct repaired welding procedure and improvement of joint properties.and to simulate the magnitude and distribution of residual stress using the finite element method (FEM).A model of temperature field of weld repaired using FEM,which was simplified,was established.the weld stress consists of ther mal stress and orgaization stress.models of the thermal stress and organization stress were described ANSYS, a software of finite element,was applied to calculate the stress,BHW35 steel was taken as an example,the simulated and experimental results for the 1 st ,3rd and 5th weldrepaired were analyzed,the simulated results are in good agreement with experimental results it can be concluded that the residual stress,in the weld center changes little,and the high residual stress exists in HAZ and in the same place the more repaired weld.the higher residual tress and the area of residual stress becomes wider.

关 键 词:数字模拟  焊接残余应力  温度场  有限元分析
收稿时间:28 August 2003
修稿时间:17 September 2004

Numerical simulation of multi-repaired weld residual stress
ZHUYuan-xiang ZHAOXue-rong ZHANGXiao-fei HULun-ji.Numerical Simulation of Multi-repaired Weld Residual Stress[J].Journal of Wuhan University of Technology. Materials Science Edition,2004,19(4):99-102.
Authors:Zhu Yuan-xiang  Zhao Xue-rong  Zhang Xiao-fei  Hu Lun-ji
Affiliation:ZHU Yuan-xiang 1) ZHAO Xue-rong 2) ZHANG Xiao-fei 2) HU Lun-ji 1) 1)Huazhong University of Science and Technology; 2)Wuhan University
Abstract:In order to understand the change regulation of residual stress during multi-repaired welding to provide theoretical guidance for correct repaired welding procedure and improvement of joint properties, and to simulate the magnitude and distribution of residual stress using the finite element method (FEM).A model of temperature field of weld-repaired using FEM, which was simplified, was established. The weld stress consists of thermal stress and organization stress. Models of the thermal stress and organization stress were described. ANSYS, a software of finite element, was applied to calculate the stress, BHW35 steel was taken as an example, the simulated and experimental results for the 1st, 3rd and 5th weld-repaired were analyzed, the simulated results are in good agreement with experimental results. It can be concluded that the residual stress in the weld center changes little,and the high residual stress exists in HAZ.And in the same place, the more repaired weld, the higher residual stress,and the area of residual stress becomes wider.
Keywords:weld residual stress  temperature field  simulation of values  finite element
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