MEASUREMENTS OF MOMENTUM TRANSFER FROM PLASTIC PROJECTILES TO MASSIVE ALUMINUM TARGETS AT SPEEDS UP TO 25,600 FEET PER SECOND
Abstract
Momentum transfer during impact at speeds from essentially 0 to 25, 600 fps was measured by a simple ballistic pendulum. The impacting projectile was made of linear high-density polyethylene and its shape and mass were maintained constant throughout the experiment. The impacted target was made of 2024-T4 Al alloy. The resulting ratio of pendulum momentum to projectile momentum varied in an orderly fashion throughout the entire velocity range, reaching a minimum of 1.0 at about 3000 fps and increasing to 1.9 at the highest velocity of 25,600 fps. The change in mass of the target was also obtained, as were penetration data for this combination of materials. It was observed that the volume of the crater as measured directly was twice the volume of the crater as computed from the target mass loss at speeds above 10,000 fps. Below 10,000 fps, this ratio increased rapidly with decreasing velocity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1962
- Accession Number
- AD0273315
Entities
People
- B. P. Denardo
Organizations
- National Aeronautics and Space Administration