Tracking method for multi-material interfaces and its application in shaped charge

This paper proposes and develops a new interface-tracking algorithm to address multi-material interfaces tracking problem in Eulerian method, by using markers on grid line. Based on this, the hydro-elastoplastic model for two-dimension is established, which embraces equation of state (EOS) and thermal softening effect of materials. Furthermore, the corresponding numerical method is presented. By implementing our newly developed interface tracking algorithm in a two-dimensional hydro-elastoplastic code, numerical tests have been conducted on the process of motion of different-shaped objects in translational, rotational and shear fluid fields, based on which the interface tracking method proposed in the paper is verified. Finally, the simulation of the formation process of shaped charge jet is performed by the code. The numerical results are in good agreement with the experimental data. This proves that the code cannot only deal with large deformation problems, but can also clearly track the variations of material interfaces. Hence, it is especially suitable for simulating the formation process of shaped charge jet.