Low velocity, Intermediate veloctiy, High velocity impact and High Strain Rate Impact
Instrumented drop tower impact with 0.5 and 0.75 inch tup for low velocity (up to 10 m/s) large mass, low velocity impact. This test provides load-deflection, force-time-energy impact data. It represents events such as tool drops and other events that cause incipient damage and significant target deflection.
Intermediate Velocity Impact Gas Gun (100 to 1200 ft/second): These events typically represent hail impact, rock debris hitting a windshield, golf ball impacts and low speed bullets,
20 - 225 m/s with a 150 g projectile (30 - 3797 J)
80 - 350 mm/s with a 15 g projectile (48 - 918 J)
100 - 410 m/s with a 3 g projectile (15 - 252 J)
Two firing configurations:
Single projectile with a 38 mm bore x 4.6 m length barrel
Tri-fire with three 25 mm bore x 4.6 m length barrels
Fires three projectiles simultaneously to simulate warhead fragmentation damage
Sequential impact with controlled impact location
Sample sizes & boundary conditions:
100 mm x 100 mm to 280 mm x 280 mm
Simply-supported & fully-clamped
±0.15 m s-1 for velocities less than 120 m s-1
±0.31 m s-1 for 120 m s-1 to 400 m s-1 velocities
Rosemount pressure transducer
Dell PC data logger
Two CED Millennium photoelectric chronographs Four magnetic induction velocity sensors
Ballistic Impact - Levels II, III, IIIA, IV and 0.50 caliber AP. These events represent projectile threats such as from fragments and live ammunition. A universal receiver with interchangeable barrels is used for these special tests.
High Strain Rate Impact- Split Hopkinson Pressure Bar to evaluate strain rate sensitiivity of materials in the strain rate range of 100 to 1500 per second. Circular or square specimens are subjected to 1D stress waves. A dynamic stress-strain curve is extracted from measuring strain on the incident and transmission bars.