Numerical simulation on interfacial wave formation in explosive welding using material point method
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摘要: 基于冲击动力学和爆炸焊接理论，采用物质点法对爆炸焊接界面波的形成进行三维数值模拟。通过数值模拟结果与爆炸焊接实验结果的对比，对复合界面材料的塑性流动变形以及界面波形成的机理进行探讨。结果表明：界面波是因为在碰撞点处的金属材料发生熔化并产生涡旋流动形成的；同时也说明采用物质点法模拟爆炸焊接界面波的形成是可行的。Abstract: Based on the impact dynamics and the basic theory of explosive welding, the material point method was applied to study the wave formation at the compounded interface by explosive welding, and the corresponding three－dimensional numerical simulations were presented.The interfacial wave formation and plasticity flowing deformation were explored, and the simulated results by the material point method were compared with the explosive welding experiments.The above investigations display that the formation of the interfacial wave in explosive welding result from melting of the metal material and flowing of the eddy at the impact point.Furthermore, the material point method presents an outstanding advantage in the numerical simulation for the interfacial wave formation in explosive welding.
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Key words:
- mechanics of explosion /
- interfacial wave /
- material point method /
- explosive welding
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图 6 爆炸焊接复合界面波x－y中间剖面
Figure 6. Interfacial wave formation of explosive welding at x－ysection
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