Research on numerical simulation of stud impact welding based on ALE
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摘要:
在原有焊接试验基础上，展开任意拉格朗日−欧拉(ALE)法下的螺柱型冲击焊数值模拟研究. 数值模拟研究结果与实际焊接试验结果高度相似，模拟结果可以真实反映实际焊接试验情况. 结合模拟数据，分析试样剖面不同位置的剪应力、压应力及对应的应变分布情况，佐证了应力波是形成波状界面的重要机理.
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关键词:
- 任意拉格朗日−欧拉法 /
- 螺柱焊 /
- 冲击焊 /
- 数值模拟
Abstract:Based on the original welding test, the numerical simulation of stud impact welding with arbitrary Lagrangian-Eulerian (ALE) method was carried out. The numerical simulation results were highly similar to the actual welding test results, so the simulation results could truly reflect the actual welding test. Combined with the simulation datas, the distribution of shear stress, compressive stress and corresponding strain at different positions of the sample section were analyzed, which proves that the stress wave was an important mechanism for the formation of wavy interface.
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图 1 螺柱型碰撞冲击焊接试验装置模型
Figure 1. Model of stud type collision impact welding experimental device
图 7 试样剖面压应力分布云图
Figure 7. Cloud map of compressive stress distribution of sample profile
表 1 纯铜子弹与钢板的Johnson-Cook模型参数
Table 1. Johnson-Cook model parameters of pure copper bullets and steel plates
材料 ρ/ (g • cm−3) G/ GPa A B n c m Tm/ ℃ Tr/ ℃ 铜 8.93 46 0.00149 0.00305 0.096 0.034 1.09 1083 288 钢板 7.83 77 0.00792 0.00510 0.260 0.014 1.03 1793 294 
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表 2 螺柱型冲击焊试验参数
Table 2. Stud type impact welding test parameters
试样编号 炸药装填量/ g 飞行速度/ (m • s−1) 碰撞角β/ (°) 1 4.5 348.9 5.93
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