摘要
采用数值模拟方法在有限元软件SYSWELD中建立了焊接三维有限元模型,利用非线性材料热物性参数和双椭球移动热源作为热传递方程的边界条件,得到了在不同预热温度条件下能熔透母材的最低焊接线能量。采用材料为API X65钢进行实验验证,表明模拟结果和实验结果基本吻合,为预热条件下采用合适的焊接工艺提供了科学的指导依据。
A 3-D finite element model for the welding was established in SYSWELD software by numerical simulation. Nonlinear material thermal parameters and translate double ellipsoid heat source were used as boundary conditions in the heat transfer equation. The minimal welding line energy which can penetrate the base material under different preheat-temperatures can be obtained. Using API X65 steel material for experimental verification, it demonstrates that the simulation result is in agree with the experimental one. So this method can be a scientific guidance to provide a suitable welding process for the welding under preheat-temperature.
出处
《热加工工艺》
CSCD
北大核心
2014年第15期164-166,共3页
Hot Working Technology
基金
国家自然基金项目(51109005)
国家青年科学基金项目(51305037)
北京市自然科学基金项目
北京市教育委员会科技计划重点项目(KZ201210017017)
北京市教委项目(KM201310017007)
关键词
数值模拟
预热温度
焊接线能量
边界条件
numerical simulation
pre-heating temperature
welding line energy
boundary conditions
