On the Possibility of Heating Metallic Cumulative Jets in Free Flight by Thermal Radiation
S. V. Fedorov, A. V. Attetkov, I. A. Bolotina
Bauman Moscow State Technical University, Moscow, Russia
Keywords: cumulative charge, cumulative jet, ultimate elongation, penetrating action, thermal softening, radiant heating, thermal radiation, thermal conductivity
Abstract
Experiments show that preheating the shaped charge liner improves its penetrating power. This increase is due to the increased ultimate elongation of the formed shaped charge jet due to thermal softening of its material. The possibility of heating the jet itself in free flight by thermal radiation from a tube located in front of the shaped charge, with heat generation within it caused by a chemical reaction of self-propagating high-temperature fusion, is considered. The characteristics of shaped charge jet heating by thermal radiation are investigated using an analytical solution to a one-dimensional axisymmetric problem of unsteady heat conduction for a uniformly elongating cylindrical rod. It is shown that before plastic breakdown of copper shaped charge jets occurs, they can be radiantly heated in free flight to a temperature that allows for a slight increase in the jet's penetrating power.
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