Accession Number : AD0717328

Title :   Experimentally-Determined Plastic Wave Velocities in Fully-Annealed 1100F Aluminum (Striker Velocity 89 ft/sec to 788 ft/sec).

Descriptive Note : Technical rept.,

Corporate Author : NORTH CAROLINA STATE UNIV RALEIGH

Personal Author(s) : Liddell,W. L. ; Steele,R. S. ; Bingham,W. L. ; Douglas,R. A.

Report Date : DEC 1970

Pagination or Media Count : 44

Abstract : A previously-reported experimental system for determining the large strains, surface rotations, strain rates, and plastic wave velocities during free-free axial impacts is used to investigate the behavior of fully-annealed small grain 1100F aluminum rods under impact conditions. The system employs in-surface diffraction grating strain transducers illuminated by a pulsed ruby laser, with the strain-surface rotation-time-dependent diffraction pattern recorded by high-speed streak cameras. Strain-time and plastic wave velocity-strain data are presented for free-free axial impacts of aluminum rods at striker velocities ranging from 89 ft/sec to 788 ft/sec. Strains to 5.5% and strain-rates to 2000/sec are recorded. The data is compared to previously-reported data as a means of establishing the validity of the experimental technique, and as corroboration of some of the existing data. (Author)

Descriptors :   (*IMPACT TESTS, RODS), (*ALUMINUM ALLOYS, STRAIN(MECHANICS)), PLASTIC PROPERTIES, STRAIN GAGES, DIFFRACTION GRATINGS, TEST EQUIPMENT, TEST METHODS, LASERS

Subject Categories : Metallurgy and Metallography
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE