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 entire ballistic impact event considering target performance can be divided into dynamic plastic penetration, spherical bulge formation, bulge advancement, plug formation and exit and projectile exit.
34 citations
TL;DR: In this paper, the effects of thickness and stacking sequence of GLARE 5 (2024-T3 aluminum alloy-unidirectional S2-glass/epoxy) fiber laminated (FML) plates subjected to ballistic impact were examined.
Abstract: This two-part article examines the effects of thickness and stacking sequence of GLARE 5 (2024-T3 aluminum alloy-unidirectional S2-glass/epoxy) fiber–metal laminated (FML) plates subjected to ballistic impact Part I presented experimental observations of damage development in the specimens, C-scan damage contours, projectile velocity profiles and ballistic limit velocities (V50) Part II concerns with finite element (FE) modeling of the FML plates The 3D FE code, LS-DYNA, was used to model and validate the experimental results Experimentally obtained incident projectile impact velocity versus the residual velocity (Vi∼Vr), damage patterns and bullet residual length were used to validate the FE model Good agreement was achieved between experimental and numerical results It was found that for a given specimen thickness/stacking-sequence, by increasing the projectile incident velocity up to its V50 value, the maximum contact force increased By further increasing the projectile velocity above its V50, t
34 citations
TL;DR: In this article, the ensemble Kohn-Sham method with the local density approximation was used to determine self-consistently the dynamic screening cloud around an impurity moving adiabatically through a uniform electron gas with velocity below the Fermi velocity.
Abstract: We have used the ensemble Kohn-Sham method with the local-density approximation to determine self-consistently the dynamic screening cloud around an impurity moving adiabatically through a uniform electron gas with velocity below the Fermi velocity. The asymmetry of the induced field and electronic density caused by the impurity motion is fully taken into account. We discuss the forward-backward asymmetry for the case of bare positive and negative charges as well as for hydrogen atoms. We show that the stopping power of the electron gas varies linearly with the projectile velocity up to velocities close to the Fermi velocity. We study the asymmetry of the bound states, its contribution to the stopping power and the evolution of the binding energy as a function of projectile velocity. Finally, we give a complete derivation of the low energy behavior of the stopping power and the generalization of the Friedel sum rule and oscillations for the case of moving impurities.
34 citations
TL;DR: In this article, a combined analytical/numerical framework is developed for ascertaining the critical impact velocities required to initiate failure in flat, back-supported ceramic targets when impacted by spherical metal projectiles.
34 citations
Patent•
02 Oct 1990
TL;DR: In this article, a jacketed projectile for a round of ammunition is described, where the jacket is deformed at least partially elastically when the projectile is driven through the barrel of a gun, the core of the projectile remaining undeformed.
Abstract: The invention is a jacketed projectile for a round of ammunition wherein the jacket is deformed at least partially elastically when the projectile is driven through the barrel of a gun, the core of the projectile remaining undeformed.
34 citations