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