平板对接焊温度场与残余应力数值模拟

Numerical Simulation of Temperature Field and Residual Stress in Flat Plate Butt Welding

为分析焊接工艺参数对平板对接焊焊后的温度及应力的分布,在热弹塑性有限元法的基础上,利用ANSYS函数加载功能实现高斯热源的移动加载,并借助ANSYS有限元软件分析了焊接电流、电弧有效加热半径、焊接速度等焊接参数对平板对接焊温度场和残余应力场的影响。研究结果表明:温度场峰值随焊接速度增加而减小,随电弧有效加热半径、焊接电流增加而加大;沿焊缝残余应力峰值随焊接速度、电弧有效加热半径、焊接电流增加而增加。

In order to analyze the influence of welding process parameters on the distribution of temperature and stress after butt welding of flat plate,the moving loading of Gaussian heat source was realized by using the function loading function of ANSYS on the basis of thermoelastic-plastic finite element method.Furthermore,the influence of welding parameters such as welding current,effective arc heating radius and welding speed on the temperature field and residual stress field of flat plate butt welding was analyzed by ANSYS finite element software.The research results show that the peak value of temperature field decreases with the increase of welding speed and increases with the increase of effective arc heating radius and welding current.The peak value of residual stress along the weld joint increases with the increase of welding speed,effective arc heating radius and welding current.