Lagrangian Simulation Of Linear Shaped Demolition Charge Formation
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This paper outlines the results of a combined numerical and experimental study of linear shaped demolition charge (LSC) formation . The demolition charge was composed of a mild steel liner, filled with castable Composition-B (CompB) high explosive (HE). The Lagrangian hydrocode, EPIC92, predicted a jet tip velocity of 5.2 km/s at 12 ^is. Subsequent experiments showed that jet tip velocities ranged from 3.3 to 3.52 km/s as determined from flash radiography and a special electrical makewire circuit test fixture. Thus, EPIC92 overpredicted jet tip velocities by 50% due to computational inaccuracies resulting from a highly distorted mesh in the collapsing liner. The problem was reanalyzed in 3-D using the Lagrangian hydrocode DYNA3D94, and jet tip velocites were overpredicted by only 15% at 12 |is.