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 paper, a series of ballistic impact tests have been performed on plain weave E-glass/polypropylene composites of different thicknesses using 0.30 and 0.50 caliber right-cylinder shaped projectiles.
Abstract: High-velocity transverse impact of laminated fiber reinforced composites is of interest in military, marine and structural applications. The overall objective of this work was to investigate the behavior of laminated thermoplastic composites of varying thicknesses under high-velocity impact from an experimental and modeling viewpoint. In order to analyze this problem, a series of ballistic impact tests have been performed on plain weave E-glass/polypropylene (E-glass/PP) composites of different thicknesses using 0.30 and 0.50 caliber right-cylinder shaped projectiles. A gas gun with a sabot stripper mechanism was employed to impact the panels. In order to analyze the perforation mechanisms, ballistic limit and damage evaluation, an explicit three-dimensional finite element code LS-DYNA was used. Material model 162, a progressive failure model based on modified Hashin’s criteria, has been assigned to analyze failure of the laminate. The projectile was modeled using Material model 3 (MAT_PLASTIC_KINEMATIC). The laminates and the projectile were meshed using brick elements with single integration points. The impact velocity ranged from 187 to 332 m s−1. Good agreement between the numerical and experimental results was attained in terms of predicting ballistic limit, delamination and energy absorption of E-glass/PP laminate.
79 citations
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TL;DR: In this article, a numerical study of conical projectiles for perpendicular impact on a thin steel plate is reported, focusing on the influence of the projectile diameter on the perforation process, assuming the same projectile mass.
79 citations
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18 Jun 1986TL;DR: In this article, a method and apparatus for setting a time delay value in an electronic fuze of a projectile exiting the muzzle of a gun barrel was proposed, in which a single transmitter coil concentrically mounted to the gun muzzle is utilized both to sense the presence of the projectile at the muzzle and to inductively transmit a radio frequency signal having a duration proportional to the fuze time delay values to a receiver coil disposed on the projectile.
Abstract: A method and apparatus for setting a time delay value in an electronic fuze of a projectile exiting the muzzle of a gun barrel, in which a single transmitter coil concentrically mounted to the gun muzzle is utilized both to sense the presence of the projectile at the gun muzzle and to inductively transmit a radio frequency signal having a duration proportional to the fuze time delay value to a receiver coil disposed on the projectile. The transmitter coil is energized from a radio frequency oscillator before the projectile is fired. As the front end of the projectile begins to emerge from the gun muzzle, its presence is detected by a change in the transmitter coil impedance, and the transmitter coil is automatically deenergized. The receiver coil is spaced from the front end of the projectile so that it is not inductively coupled to the transmitter coil, the transmitter coil is reenergized from the oscillator for a time period proportional to the fuze time delay value to be set, then again deenergized until the projectile has completely emerged from the gun muzzle. The signal received by the receiver coil is processed by circuitry within the projectile to set the fuze time delay value.
79 citations
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TL;DR: The United States Navy is considering the electromagnetic (EM) railgun as a future candidate for long-range shore bombardment missions as mentioned in this paper, and a brief study evaluates the gun and the pulsed power supply for this application.
Abstract: The United States Navy is considering the electromagnetic (EM) railgun as a future candidate for long-range shore bombardment missions. This brief study evaluates the gun and the pulsed power supply for this application. Approximate parameters are derived for a notional system that includes the projectile, launch package, railgun, and pulsed power components.
79 citations
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TL;DR: In this article, an experimental method is presented for the study of one-dimensional plane waves corresponding to combined pressure and shear. The experiment involves the impact of two skewed flat plates.
Abstract: An experimental method is presented for the study of one-dimensional plane waves corresponding to combined pressure and shear. The experiment involves the impact of two skewed flat plates. A projectile plate is accelerated using a gas gun and made to impact a target plate in a vacuum chamber. The projectile and target plates are parallel, but inclined relative to the axis of the gun so that the particle velocity in the target has components both normal and parallel to the plane of impact.
79 citations