A previously-reported experimental system for determining the large axial strains, surface rotations, strain rates, and plastic wave velocities during axial impacts at striker velocities up to 2000 ft/sec has been further developed, and is used to investigate the behavior of polycarbonate (Lexan) under high-speed impact. The system employs in-surface diffraction grating strain transducers illuminated with 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 axial impacts of polycarbonate rods at striker velocities ranging from 1071 ft/sec to 1810 ft/sec. Strains in excess of 20 percent with strain-rates in excess of 16,000 per sec have been recorded, as well as wave velocities to 7500 ft/sec.

  • Corporate Authors:

    North Carolina State University, Raleigh

    Raleigh, NC  United States  27695
  • Authors:
    • Liddell, W L
    • Steele, R S
    • Bingham, W L
    • DOUGLAS, R A
  • Publication Date: 1970-12

Media Info

  • Features: References;
  • Pagination: 36 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00025599
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: 70-10
  • Contract Numbers: N00014-68-A-0187
  • Files: TRIS
  • Created Date: Feb 11 1973 12:00AM