Abstract
AbstractResults are presented from two‐dimensional computations simulating the development of detonation for various configurations of shaped charges containing inert elements. These calculations were performed using the nonlinear explicit finite‐difference computer code PISCES 2D ELK. The numerical model employed represented the high explosives by a finely zoned Lagrangian mesh and used JWL (Jones‐Wilkins‐Lee) equation of state with C‐J (Chapman‐Jouguet) burn model. The inert elements were modeled by Lagrangian grids and used Mie‐Grueneisen equations of state with a linear relationship between the shock velocity (Us) and particle velocity (Up) fitting the Hugoniot data of the inert materials. The development of detonation waves all around the wave‐shaper are shown in contour plots of pressure at various time steps during the calculations. Mesh plots of the different configurations are also reported. Our simulations are compared with previous radiographic and numerical results for a slab of explosive with an aluminium confinement and with recent not yet published streak‐camera tests on a particular shaped charge configuration with hemispherical wave‐shaper. Our numerical results appear to be in good agreement with the experimental data.
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