Penetration of projectiles was measured for hemispherical and conical nose shapes penetrating granular media. Targets were beds of Ottawa sand and Eglin sand. Projectiles were rigid metals. Experimental parameters that were varied included velocity (from 300 to 600 m/s), nose shape, sand density, and scale (from 5 mm to 20 mm). Strong evidence for scale effects is found: 5 mm diameter projectiles are less effective penetrators than 12.5, 15, or ...
The objective of this research was to elucidate the response of geological media such as sand and soil to high-speed and high-pressure loading of projectiles. Particularly, penetration mechanics of high-speed projectiles into granular materials and response of granular media to shock waves were our substantial concern. One of unique the approaches we proposed was to collect numerical data and imaging data in laboratory scale experiments on high-speed projectile impacts using ...
This is the final report of a project to grasp various phenomena induced by the high-speed impact of projectiles on sand. These were the behavior of ejecta and the projectile, the penetration depth and speed of the projectile, and fractured grains and pressure distribution.
Reports by Author
