Detonation process analysis and interface morphology distribution of double vertical explosive welding by SPH 2D/3D numerical simulation and experiment. (June 2020)

• Record Type: Journal Article
• Authors: Sun, Zerui; Shi, Changgen; Xu, Fei; Feng, Ke; Zhou, Chunhua; Wu, Xiaoming
• Is Part Of: Materials & design. Volume 191(2020)
• Publication Date: 2020-06
• Subjects: Explosive welding -- Numerical simulation -- SPH method -- Interface morphology -- Interface prediction -- Parameter analysis; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2020.108630
• Languages: English
• ISSNs: 0264-1275

Abstract

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. Graphical abstract: Unlabelled Image Highlights: Comparing the left-end detonation, the mid-point detonation had the higher pressure, shorter duration, and more uneven interface morphology. The process parameters obtained in the three-dimensional model were slightly smaller than those in the two-dimensional models. Due to unstable explosive detonation and boundary effect, the straight interface appeared near the detonation point and the boundaries. The wave interface of the composite plates was butterfly-shaped after an explosion.