Numerical study of the mechanism of wavy interface generation in explosive welding

Wavy interface generation is an interesting characteristic of explosive welding. There have been many theoretical and experimental discussions of the mechanism of wavy interface generation, but there is no consensus of opinion as yet. We report on a numerical approach to the analysis of the mechanism of wavy interface generation in explosive welding. The wavy interface generation process is calculated using a two-dimensional finite difference scheme for elastic-plastic materials. In this simulation the equations for a symmetric collision between copper plates are solved. The concept behind this study is that the wavy interface and vortex street are caused by the velocity distribution of shear flow and periodic disturbance at the interface. The calculation results show the deformation process of the wavy interface and we obtain qualitative agreements between numerical and experimental results.