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, a torsion-type Hopkinson bar was used to measure the torsional adhesion of a spinning projectile during target penetration, and the energy loss due to friction was computed.
Abstract: The frictional adhesion between projectile and target during a ballistic penetration has been measured with a torsion‐type Hopkinson bar. The apparatus allows measurement of the torsional adhesion of a spinning projectile during target penetration. By assuming the friction resisting rotation to be equal to that resisting axial penetration, the energy loss due to friction was computed. The results show that the torque‐time pattern during penetration of a ``mechanically'' clean projectile can be predicted with the assumption of a frictional energy loss just sufficient to keep the sliding surfaces at the melting temperature of the metal. Metallographic analysis of the target metal at the projectile interface gives a further indication of a molten interface. In these tests, sliding friction accounts for about 3% of the striking energy of the projectile; common surface contaminants, not necessarily special lubricants, reduce this loss to less than 1%.
71 citations
TL;DR: In this paper, a realistic finite element model of TWARON fabric at yarn level is generated with eight node solid elements, and the effects of several parameters including energy absorption, size of the hole made by the projectile and von-Mises stress distribution for different nose angles and time steps are investigated.
71 citations
31 Jan 1967
TL;DR: In this paper, the authors describe basic experimental and theoretical work on the interaction of projectiles and lightweight composite armor, which consists of a very hard and inflexible facing plate (ceramic) bonded to a flexible backing plate (fiber glass) focusing on the mechanism of interaction between a facing plate and a hard projectile (steel).
Abstract: : The report describes basic experimental and theoretical work on the interaction of projectiles and lightweight composite armor The armor of interest consists of a very hard and inflexible facing plate (ceramic) bonded to a flexible backing plate (fiber glass) Attention has been focused on the mechanism of interaction between a facing plate and a hard projectile (steel) Experimental results consist of high speed camera photographs of the projectile- armor interaction and observations of the final state of the projectile and armor Theoretical analyses, based on the theory of elasticity, were used to established stress fields in the facing plate during the initial stages of impact and to determine deflections and bending moments during the later stages In addition to this work on the mechanics of projectile-armor interaction, exploratory experiments were undertaken with a view toward establishing the dynamic mechanical properties of aluminum oxide, an important facing material
71 citations
TL;DR: In this paper, the impact performance of a hybrid composite made of woven fiber Kevlar-29 and Al2O3 powder/epoxy subjected to high velocity impact is presented both theoretically and experimentally.
70 citations
TL;DR: In this paper, a Doppler radar monitored the projectile pre-impact velocity history and a high-speed camera captured the projectile residual velocity for penetration and perforation of high performance concrete targets by steel projectiles.
70 citations