Abstract
This study developed a hydrocode to numerically simulate both conical and linear-shaped charges using an Eulerian multi-material and multi-phase flow model. Elasto-plastic solids and the detonation of a high explosive charge were modeled using a Johnson–Cook material model and the programmed burn model, respectively. Further, the plasticity of the solids was calculated using a radial return mapping algorithm. The model was solved using a high-resolution computational fluid dynamics (CFD) technique on Cartesian grids. Material interfaces were tracked using the level-set method, and the boundary conditions were imposed using the ghost fluid method. The developed hydrocode was validated using high-speed impact problems. Consequently, the developed hydrocode was used to successfully simulate the evolution and penetration of metal jets in shaped charges after a detonation.
Highlights
Linear-Shaped Charges Using anA shaped charge is a highly explosive charge for focusing explosive energy in one direction using the Monroe effect [1]
A shaped charge consists of a high explosive with a hollow cavity, a thin metal liner, a detonator, and a metal casing
When an explosive is ignited, a high-pressure and high-temperature explosive gas, whose pressure is concentrated in the center of the metal liner, is generated, which results in large deformation
Summary
Linear-Shaped Charges Using anA shaped charge is a highly explosive charge for focusing explosive energy in one direction using the Monroe effect (or the Neumann effect) [1]. Shaped charges are used in numerous military and industrial applications, such as high-explosive anti-tank warheads [2], emergency escape devices for aircraft pilots, stage and fairing separation devices for space rockets [3], and for the removal and destruction of engineering facilities. Depending on their shape, shaped charges are mainly divided into conical- and linear-shaped charges, wherein the conical-shaped charge is used for penetration-related applications, and the linear-shaped charge is used for cutting objects
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