Accession Number:

AD0775801

Title:

Gas Gun Launch of Free Flying Thin Plate,

Descriptive Note:

Corporate Author:

HARRY DIAMOND LABS WASHINGTON D C

Personal Author(s):

Report Date:

1973-08-01

Pagination or Media Count:

32.0

Abstract:

The report describes a method used for propelling a thin disk flyer plate against a target to produce pulse-form shocks. A projectile is accelerated in a rupturing-diaphragm type gas gun, strikes a fixed metal plate, and is stopped. The impact-generated shock wave travels through the metal plate and spalls off a thin aluminum disk attached to its opposite surface. The method of bonding the thin disk to thee plate is critical for good shock transfer low-viscosity Eastman 910 adhesive is most satisfactory. Disks 0.8 mm or 0.3 mm thick and 8.5 cm in diameter are propelled at velocities up to 280 msec, impacting a target flat within 0.1 mm. The expected flyer-to-projectile velocity ratio and wave profiles is computed with the PUFF 66 code. The predicted velocity ratio is 0.78 and the experimental value is 0.61 this is a reasonable discrepancy considering the simplifying assumptions. In relatively low-velocity thick flyers this method appears comparable to the best available. Author

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Armor

Distribution Statement:

APPROVED FOR PUBLIC RELEASE