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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.


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Journal ArticleDOI
TL;DR: In this paper, the UCA stopping power model has proven its strength for the determination of nonequilibrium effects for light as well as heavy projectiles at intermediate to high projectile velocities.
Abstract: Recent developments in the theoretical treatment of electronic energy losses of bare and screened ions in gases are presented. Specifically, the unitary-convolution-approximation (UCA) stopping-power model has proven its strengths for the determination of nonequilibrium effects for light as well as heavy projectiles at intermediate to high projectile velocities. The focus of this contribution will be on the UCA and its extension to specific projectile energies far below 100 keV/u, by considering electron-capture contributions at charge-equilibrium conditions.

40 citations

Journal ArticleDOI
TL;DR: In this article, the authors compare piecewise Cubic Hermite Interpolating Polynomial (PCHIP), cubic splines, and piecewise linear functions to approximate the aerodynamic coefficients of a generic small arms projectile.

40 citations

Journal ArticleDOI
F.Y. Xu1, Qingbo Yu1, Yuanfeng Zheng1, Mo-ang Lei1, Haifu Wang1 
TL;DR: In this article, the double-spaced aluminum plates, impacted by the cold isostatically pressed and sintered PTFE/Al/W reactive material, were investigated by the ballistic impact experiments and the theoretical analyses.

40 citations

01 Dec 1991
TL;DR: In this paper, the authors compared five single plate penetration equations for accuracy and effectiveness with test results from test results with velocities ranging up to 8 km/s, and the results were plotted on diameter versus velocity graphs for ballistic and spallation limits.
Abstract: Five single plate penetration equations are compared for accuracy and effectiveness. These five equations are two well-known equations (Fish-Summers and Schmidt-Holsapple), two equations developed by the Apollo project (Rockwell and Johnson Space Center (JSC), and one recently revised from JSC (Cour-Palais). They were derived from test results, with velocities ranging up to 8 km/s. Microsoft Excel software was used to construct a spreadsheet to calculate the diameters and masses of projectiles for various velocities, varying the material properties of both projectile and target for the five single plate penetration equations. The results were plotted on diameter versus velocity graphs for ballistic and spallation limits using Cricket Graph software, for velocities ranging from 2 to 15 km/s defined for the orbital debris. First, these equations were compared to each other, then each equation was compared with various aluminum projectile densities. Finally, these equations were compared with test results performed at JSC for the Marshall Space Flight Center. These equations predict a wide variety of projectile diameters at a given velocity. Thus, it is very difficult to choose the 'right' prediction equation. The thickness of a single plate could have a large variation by choosing a different penetration equation. Even though all five equations are empirically developed with various materials, especially for aluminum alloys, one cannot be confident in the shield design with the predictions obtained by the penetration equations without verifying by tests.

40 citations

Journal ArticleDOI
TL;DR: In this article, the process of L and M-shell ionization of atoms by heavy, charged particles is analyzed in detail by a semiclassical, time-dependent perturbation method.
Abstract: The process ofL- andM-shell ionization of atoms by heavy, charged particles is analysed in detail by a semiclassical, time-dependent perturbation method. The target electrons are described by non-relativistic hydrogenic wave functions. For the projectile is assumed a well-defined straight-line path. The Coulomb deflection and the screening is partially taken into account.

40 citations


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