Topic
Projectile
About: Projectile is a research topic. Over the lifetime, 13047 publications have been published within this topic receiving 115563 citations.
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TL;DR: In this article, the authors describe the normal penetration of a deformable projectile into an elastic-plastic target, where the force imposed on the projectile by the target is generally a complex function of the strength of the target material, the projectile velocity, its diameter and shape, as well as the instantaneous penetration depth.
28 citations
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TL;DR: This work presents a fully ab initio, nonperturbative, time-dependent approach to describe single and double ionization of helium by proton and antiproton impact using a flexible finite-element discrete-variable representation on the radial grid.
Abstract: We present a fully ab initio, nonperturbative, time-dependent approach to describe single and double ionization of helium by proton and antiproton impact. The problem is discretized by a flexible finite-element discrete-variable representation on the radial grid. Good agreement with the most recent experimental data for absolute angle-integrated cross sections is obtained for projectile energies between 3 keV and 6 MeV. Also, angle-differential cross sections for two-electron ejection are predicted for a proton impact energy of 6 MeV. The time evaluation of the ionization process is portrayed by displaying the electron density as a function of the projectile location.
28 citations
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TL;DR: In this paper, a series of experiments were performed to study the deformation and failure of fluid-filled vessel subjected to high speed impact loading, and the results indicated that the hydrodynamic ram effect in the water-filled tank increased the damage of the target panels.
28 citations
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19 Dec 1980
TL;DR: In this article, a gun-launched ramjet is used to follow a classical vacuum ballistic trajectory by maintaining a thrust-drag balance, which is varied by an air door which bleeds air from the duct that leads from the supersonic diffuser at the front of the projectile to the combustion chamber.
Abstract: A gun-launched ramjet projectile follows a classical vacuum ballistic trajectory by maintaining a thrust-drag balance. The thrust of the ramjet is varied by an air door which bleeds air from the duct that leads from the supersonic diffuser at the front of the projectile to the combustion chamber. The control system for the air door includes an actuator and a pair of accelerometers, the output of which is integrated to provide an indication of velocity. The first accelerometer operates during the launching of the projectile in the gun to measure the launch velocity. A second, and more sensitive, accelerometer measures in-flight velocity changes due to atmospheric conditions. Both of the measured velocities are compared with prerecorded standards and error signals are derived representing any velocity deviations. These error signals are combined and then used to drive the air doors which varies the thrust of the ramjet so that it follows the classical vacuum ballistic trajectory.
28 citations
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TL;DR: In this article, flat-ended cylindrical projectiles were projected at high speed against a thin mild steel plate to examine the impact conditions relevant to their containment, and a diagram of the equipment used, a photograph and photomicrographs of typical perforated plates are provided.
28 citations