Velocity, projectile

Armor. Sihcon carbide is used as a candidate in composite armor protection systems. Its high hardness, compressive strength, and elastic modulus provide superior baUistic capabihty to defeat high velocity projectile threats. In addition, its low specific density makes it suitable for apphcations where weight requirements are critical (11). 

The present statistical study has been motivated by a desire to better understand and interpret dynamic fragmentation in mechanical systems. Applications include the blasting of rock with explosives or the fragmentation caused by the impact of a high-velocity projectile. For the reasons noted earlier it is difficult to verify the present statistical theory with experiments. Recently, however, support for the theories have emerged from rather diverse sources. 

This equation can be derived from the laws of physics, in which case the parameteers a and b can be related to such factors as the muzzle velocity, projectile mass, angle of inclination of the gun, and wind resistance. The equation may also be empirical if measured values of z versus x are related by an equation of this form, with no reference to the laws of physics. 

Velocity, Projectile. See earlier treatments in Vol 2, B5-R to B6-L, under Ballistic Measuring Methods and Ballistic Tests in Vol 3, C304-R to C310-R, under Chronoscopes, Chronometers and Other Devices Used in Measuring Velocities of Projectiles in Flight and of Detonation Velocities of Explosives and in Vol 8, M162-R to M163-L, under Muzzle Velocity ... 

Figure 8.16 Two ways a plug can rupture a pipe (at left) via momentum impact of high velocity projectile at a pipeline bend, and (at right) via a combination of plug momentum and gas compression at a pipeline obstruction.

An EFP uses the action of the explosive s detonation wave (and to a lesser extent the propulsive effect of its detonation products) to project and deform a plate or dish of ductile metal (such as copper or tantalum) into a compact, high-velocity projectile, commonly called the slug (Fig. 7.7). This slug (one projectile with homogeneous velocity) is projected towards the target at about two kilometers per second. The main advantage of the EFP over a conventional shaped charge is... 

In Fano s parameterization it is implied—differently from (14) and (IS)— that autoionizing transitions from different states do not interfere with each other. The same is true for a parameterization given by Shore. Except for this, however, the parameterizations are equivalent and the parameters are related by simple formulas. Autoionization spectra due to photoionization as well as collisional ionization with fast electrons, " ions, and atoms, " have successfully been analyzed by means of Fano s parameterization. In collisions with low-velocity projectiles, however, other effects become important that influence the relative phases of the ionization amplitudes and thus the spectral shapes. Also interferences between different autoionization amplitudes have to be taken into account. 

Ong, K. C. G., Basheerkhan, M., Paramasivam P. (1999) Resistance of fibre concrete slabs to low velocity projectile impact, Cement and Concrete Composites, 21 391-401. 

A fully compressible reactive hydrodynamic model for the process of hydrovolcanic explosion of liquid water to steam at constant volume and pressures of 30,000 atmospheres has been applied to the explosion of Krakatoa in 1883. The idealized spherical geometry exhibits the general characteristics observed including the destruction of the island and the projection of the island into high velocity projectiles that travel into the high upper atmosphere above 2 kilometers. A high wall of water is formed that is initially higher than 100 meters driven by the shocked water, basalt and air. 

Although, for school windows, where low mass high velocity projectiles are not generally the major problem (rather, the problem is high mass-low velocity projectiles - rocks) a more efficient solution would be a homogeneous plastic such as polycarbonate. 

Method Projectile Velocity Projectile Size Kinetic Energy per Nucleon... 

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