Abstract The double vertical explosive welding process produces two composites in one explosion and improves the energy utilization efficiency. However, the interface morphology at different positions shows obvious unevenness. 2D and 3D models of double vertical explosive welding were established by SPH. The interface morphology and process parameters were analysed. The relationship between the interface morphology and process parameters was discussed, and the pressure condition was the most suitable wave-forming condition in this paper. The interface morphology of the whole plate was predicted by combining the pressure condition with the contours of the flyer plate of the 3D model. A relevant experiment was carried out, and samples at different locations were observed under an OM. The results indicated that the wave interface and jetting were reproduced well in the 2D models. The distribution of the wave interface presented a butterfly shape. A straight interface existed at the detonation point and the boundary areas. The distribution of interface morphology in the experimental results was basically the same as those predicted by the numerical simulations. In addition, a discontinuous convex block was observed in the straight interface. Evidence of a vortex, jetting and an island region existed in the large wave interface.

中文翻译：

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SPH 2D/3D数值模拟与实验双立式爆炸焊接爆轰过程分析及界面形貌分布

摘要 双立式爆炸焊接工艺一次爆炸产生两种复合材料，提高了能量利用效率。然而，不同位置的界面形态表现出明显的不均匀性。SPH建立了双立式爆炸焊接的2D和3D模型。分析了界面形貌和工艺参数。讨论了界面形貌与工艺参数之间的关系，压力条件是本文最适合的波形形成条件。通过将压力条件与 3D 模型飞板的轮廓相结合，预测了整个板的界面形态。进行了相关实验，在OM下观察了不同位置的样品。结果表明，在二维模型中可以很好地再现波浪界面和喷射。波界面的分布呈蝴蝶状。引爆点和边界区域存在直线界面。实验结果中界面形貌的分布与数值模拟预测的基本一致。此外，在直线界面中观察到不连续的凸块。大波界面中存在涡旋、喷射和岛区的证据。实验结果中界面形貌的分布与数值模拟预测的基本一致。此外，在直线界面中观察到不连续的凸块。大波界面中存在涡旋、喷射和岛区的证据。实验结果中界面形貌的分布与数值模拟预测的基本一致。此外，在直线界面中观察到不连续的凸块。大波界面中存在涡旋、喷射和岛区的证据。