摘要
为了提高汽车焊接结构的可靠性,首先建立了T型板的有限元模型,提出了两种边界条件的工艺方案,然后通过SYSWELD有限元软件分析比较了这两种方案的应力和变形。结果表明,焊缝热影响区出现最大残余拉应力,两种方案的最大残余拉应力值约相同,但方案一焊缝两边出现最大残余拉应力的区域要大于方案二,方案二焊缝两端附近的残余拉应力值高于方案一;两种方案焊后的最大整体变形都发生在腹板的顶部,靠近焊接结束端那一侧,但方案一的变形值小于方案二。在仅考虑残余应力和整体变形的前提下,选择方案一中的边界条件能够提高T型板的可靠性。
In order to improve the reliability of automobile welding structure, firstly, we established a finite element model of T plate and put forward two kinds of boundary conditions. Then, the stress and deformation of two schemes were analyzed using finite element software SYSWELD. The results have shown that the maximum residual tensile stress occurs in the heat affected zone and two schemes of maximum residual tensile stress value are approxi- mately the same, but the region of the maximum residual pull stress of both sides of the welding of the first scheme is greater than the second scheme. The value of residual pull stress of the two welding terminals of the scheme two is higher than the value of the scheme one. The maximum total deformation of the two schemes is at the top of the web, which is close to the side of the end of the welding. The maximum value of the solution of the scheme one is lower than the scheme two. Under the premise of considering only the residual stress and the whole deformation, the boundary condition of the scheme one is selected.
作者
李青
王岩松
赵礼辉
刘宁宁
LI Qing WANG Yan- song ZHAO Li -hui LIU Ning- ning(School of Automotive Engineering, Shanghai University of Engineering Science, Shanghai 201620, China School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China)
出处
《计算机仿真》
北大核心
2017年第4期200-203,355,共5页
Computer Simulation
基金
国家自然科学基金资助项目(51575335)
关键词
边界条件
残余应力
变形
Boundary condition
Residual stress
Deformation
