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 authors used a nylon projectile and measured the fundamental quantities of the vapor, that is, the expansion velocity, the shape of vapor cloud, the temperature, and the light energy, by observing the light radiating from the vapor.
Abstract: Observations of the expanding vapor cloud generated by the hypervelocity impact have been carried out. Under usual laboratory conditions, rock or ice materials cannot be vaporized completely. In order to investigate the expansion of a large amount of the vapor by complete vaporization caused by hypervelocity impact, we used a nylon projectile and measured the fundamental quantities of the vapor, that is, the expansion velocity, the shape of the vapor cloud, the temperature, and the light energy, by observing the light radiating from the vapor. The expansion velocity of the leading edge of the vapor is almost constant with time and is about twice that of the isothermal sound velocity, which is defined from the pressure and the density of the nylon projectile after passing of the shock wave. The shape of the cloud is not always hemispherical but depends on the combination of the material of the projectile and target, and impact velocity and angle. Inside the vapor cloud are not only the vapor but also the solid ejecta, which travel with the same velocity as the leading edge of the cloud. The temperature of the cloud in the case of nylon impacting on nylon decreases with the power law exponent of time of −0.04 to −0.2. The light energy radiating from the cloud is about 10−4 to 10−5 times the initial projectile kinetic energy.
37 citations
TL;DR: A technical overview of experimental methods using high explosive techniques for conducting hypervelocity impact studies is presented in this paper, where the authors use the explosive detonation fronts as means of accelerating the projectile, or as a means of compressing a light gas which is then used to launch the projectile.
37 citations
TL;DR: In this paper, the authors measured the ballistic performance of five ceramic materials (alumina, silicon carbide, boron carbide and titanium diboride) and Pyrex, when they are backed by thick steel plates.
37 citations
TL;DR: In this article, the interaction of 6Li, 9Be and 12C projectiles with a 28Si target was investigated by measuring the angular distributions of the elastically scattered projectiles and of the emitted protons, deuterons and α-particles.
37 citations
TL;DR: In this article, a numerical study on the perforation of sheet steel by a projectile under high impact velocity was performed to predict the ballistic behavior and, in particular, the ballistic limit.
37 citations