Impact Pulse Shaping
Abstract
The Harry Diamond Laboratories 4- and 7-in. air guns are used to slowly accelerate projectiles and components contained therein to speeds up to 900 ft/sec. The impacts of these projectiles are designed to produce pulse shapes (projectile decelerations) that simulate the interior ballistic acceleration environments occurring in a real gun. The continuity, momentum, and energy conservation equations are applied to the impact testing of projectiles, and calculations obtained therefrom are compared with experimental air gun data of projectile time-deceleration. Data refer to projectile speeds of 300 to 650 ft/sec, accelerations up to 40,000 g, with energies of 14,000 and 43,000 ft-lb (for the 4- and 7-in. guns, respectively) impacting on aluminum honeycomb mitigators having a variable crush area, uniform static crush strengths of 725, 2000, 4000, and 8000 psi, and a velocity (strain-rate) dependent dynamic crush strength.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1975
- Accession Number
- ADA022351
Entities
People
- Irvin Pollin
Organizations
- Harry Diamond Laboratories