The penetration of porous projectiles in aluminum and plastic targets
Penetration of porous projectiles in aluminium and plastic targets
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Penetration of porous projectiles in aluminium and plastic targets
Target pressure and damage data from impacts by explosively propelled aluminum projectile
Plate-gap model of porous solid and application to reduced density projectile impact
Experimental measurement of rates of energy release in solid propellants subjected to strong shock waves from projectile impact
Shock wave pressure decay in polycarbonate targets impacted by hypervelocity cylindrical projectile
Projectile shape effects on hypervelocity impact craters in aluminum
Crater characteristics of 11 metal alloys under hypervelocity impact including effects of projectile density and target temperature
Simulation of meteoroid-velocity impact using dense projectiles
Mathematical model of shock wave propagation in target subjected to hypervelocity projectile impact
Rate of energy release in solid rocket propellants determined by square shock waves produced by projectile impact
Holographic technique to record hypervelocity projectile with front light resolution, discussing image blurring
Polished metals exposed to hypervelocity impact by micrometer size projectiles to determine bombardment effect on spectral reflectance
High velocity impact tests conducted with polyethylene terephthalate projectiles and flexible composite wall panels
Hypervelocity projectile material impact on ultimate reflectance of bombarded polished metals from shock tube tests
The effect of nose shape and tail length on the static stability of a fin-stabilized projectile has been investigated in the Langley Unitary Plan with tunnel at angles of attack to about 12 deg for a Mach number range from 1.5 to 2.5. The tests were made at a constant Reynolds number of 6.56 x 1,000,000 per meter. The results of the investigation showed that nose shape had no effect on the static stability. Increasing the tail length resulted in a progressively stabilizing tendency. However, only the 1.5-caliber-tail-length configuration was stable over the test angle-of-attack range at Mach number 1.5. This configuration was marginally stable or unstable at the higher Mach numbers, and the shorter configurations were unstable at all Mach numbers for either part of or the entire test angle-of-attack range.
Apparatus uses optoelectric detector to measure station-to-station time-of-flight of small spherical aluminum projectile down steel barrel. Instrument has been used to study impact resistance of composite materials used in aircraft structural research program.
A semiconductor projectile impact detector is described for use in determining micrometeorite presence, as well as its flux and energy comprising a photovoltaic cell which generates a voltage according to the light and heat emitted by the micrometeorites upon impact. A counter and peak amplitude measuring device were used to indicate the number of particules which strike the surface of the cell as well as the kinetic energy of each of the particles.
Static and dynamic stability tests were made of a finned projectile configuration with the aft-mounted fins arranged in a cruciform pattern. The tests were made at free stream Mach numbers of 0.7, 0.9, 1.1, and 1.2 in the Langley 8-foot transonic pressure tunnel. Some of the parameters measured during the tests were lift, drag, pitching moment, pitch damping, and roll damping. Configurations tested included the body with undeflected fins, the body with various fin deflections for control, and the body with fins removed. Theoretical estimates of the stability derivatives were made for the fins on configuration.