Demolition effect of reactive material liner shaped charge against concrete target

Demolition effect of reactive material liner shaped charge against concrete targets was studied with a method combining numerical simulation and ground-based experiment. In the Autodyn simulation, both the formation of reactive material jet and its penetration process were simulated by Euler-2D solver, whereas SPH-3D solver was used for the demolition effect of reactive material jet. The Powder Burn model was employed to describe the deflagration behavior of reactive materials. The whole numerical simulation process was implemented by an Euler to SPH solver transition. The simulation results show that, the influence of stand-off on terminal effect of reactive material jet is greater than that of metal jet. The dramatic demolition effect produced by a combination of penetration and deflagration was achieved at one charge diameter stand-off, corresponding to an effective demolition depth approximate to 6.5 charge diameter. When increasing stand-off beyond two charge diameter, however, the demolition effect of reactive material jet drops off significantly. Moreover, the ground-based experiments are also conducted, and the results show a good fit with numerical simulations.