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Projectile

About: Projectile is a research topic. Over the lifetime, 13047 publications have been published within this topic receiving 115563 citations.


Papers
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Journal ArticleDOI
TL;DR: In this article, a model for penetration analysis of a rigid projectile into a soil target is presented, where the soil medium is represented by a set of discs of constant thickness, responding in the radial direction under a plain strain regime.
Abstract: SUMMARY A new one-dimensional model for penetration analysis of a rigid projectile into a soil target is presented. The soil medium is represented by a set of discs of constant thickness, responding in the radial direction under plain strain regime. When penetration through a typical disc occurs, the projectile displaces soil material and a radial plastic shock wave propagates in the disc. The interaction pressure between the projectile and soil material is compatible with the motion of the contact boundary between them. The instantaneous resistive force is obtained by summation of the contributions of all the discs which are in contact with the nose surface of the projectile. Soil is considered as a 'floating' ideally locking material, in which the locking volumetric strain is adjusted to the physical stress-strain properties of the soil material. Friction between projectile and soil is assumed to be negligible. Comparison is made with both twodimensional computer program results and experimental data, and very good agreement is observed. Comparison with other analytical methods reveals that the present model most closely resembles existing experimental results and permits further analysis of the problem as predictions of target response and of stress distribution on the projectile nose. The calculations require very small amounts of computer time. Analysis with the present model yields an efficient and comprehensive means to analyse penetration and perform parameter analysis.

48 citations

Patent
14 Dec 1992
TL;DR: In this article, a system and method for launching fireworks projectiles, which explode in the air into a pyrotechnic display, is described, where a shell is constructed from a binding agent and an explosive additive which explodes the shell into small particles.
Abstract: A system and method for launching projectiles, such as fireworks projectiles, which explode in the air into a pyrotechnic display. The projectile includes a shell constructed from a binding agent and an explosive additive which explodes the shell into small particles. The explosive additive, which may be nitrocellulose, causes the exploded particles to be rapidly burned and consumed to form lightweight, inert flakes that fall harmlessly to the ground. The projectile is aimed and launched by a launcher using a compressed gas to rapidly expel the projectile from a launching tube. Once in the air at a predetermined location in the sky, an electronic fuse inside the projectile operates to detonate the projectile into its intended pyrotechnic display. The fuse is extremely accurate and enables detonation of the projectile at precise altitudes. An electronic control system controls launching and detonation of the projectiles in a precise and repeatable manner.

48 citations

Patent
30 Mar 1993
TL;DR: In this article, a switching system for switching between the first and second modes of operation of a self-contained pumping mechanism was presented. But the switching system was not designed for the automatic switching of a single-shot machine.
Abstract: A gun having a first mode of operation for propelling the projectile by compressed gas contained within a cartridge and a second mode of operation for propelling the projectile by air compressed by a self contained pumping mechanism. A switching system is provided for switching between the first and second modes. The switching system includes a valve having a first position corresponding to the first mode of operation and a second position corresponding to the second mode of operation. The first position allows compressed gas from the cartridge to propel the projectile and the second position prevents compressed gas from the cartridge from propelling the projectile and allows the projectile to be propelled by compressed air from the pumping mechanism. A switch member is provided for positioning the valve in the first and second positions. The switch member is capable of being actuated by the gun operator to switch the gun between the first and second modes.

48 citations

Journal ArticleDOI
TL;DR: In this paper, a fractional calculus is used to model the trajectories of a single-arm mortar in the presence of air resistance, and it is shown that at certain conditions, the range and the maximum height of the projectile obtained by using the fractional approach give the same results of the classical calculus.

47 citations

Patent
12 Apr 1972
TL;DR: In this paper, the authors describe a system that can be dropped from an air-frame and is capable of scanning the ground for military targets, e.g., tanks and vehicles, and then directionally propelling a target when it locates one.
Abstract: The invention relates to a munition system, which can be dropped from airft and is capable of scanning the ground for military targets; eg, tanks and vehicles, and then directionally propelling a projectile at the target when it locates one The munition system includes a housing, which contains an explosive warhead capable of directionally propelling a projectile, a directional sensing fuze in alignment with the path of the projectile, and a parachute to retard the descent and induce rotation of the housing at a predetermined rate, whereby the sensing fuze has sufficient time to scan the ground along a spiral path for military targets

47 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20242
2023650
20221,196
2021290
2020458
2019452