Gravity Effects on Low Velocity Penetration of a Projectile Into a Cohesionless Medium
Abstract
The effects of gravity on the low velocity penetration of a projectile into Ottawa Sand are investigated in this study. A cylindrical aluminum projectile weighing 64.1 gm is fired at velocities in the range 800- 1500 cm/sec into a bed of Ottawa Sand at gravity levels of 0.17, 0.38, 1.00, and 2.00 g. Maximum penetrations are compared at these levels. An inverse relationship is found between maximum penetration and gravity. Terrestrial soil penetration equations are discussed and compared with the data from the experiment. A method to transform a terrestrial equation into an equation valid at gravity levels in the range of the experiment is suggested. Deceleration traces are produced by computer from penetration-time data that is fit with a least-squares polynomial and mathematically differentiated. Double-peaked curves result at all gravity levels.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1969
- Accession Number
- AD0859717
Entities
People
- Anthony P. Pyrz
Organizations
- Air Force Institute of Technology