THE MECHANICAL PROPERTIES OF COPPER AT HIGH STRAIN RATES. VOLUME II. ANALYTICAL AND EXPERIMENTAL PLASTIC STRAIN PROFILES IN HIGH VELOCITY IMPACT.

Abstract

Cold-drawn copper rods were end-impacted with projectiles having lengths of 1 to 5 inches and initial velocities of 500 to 1240 in./sec, and the resulting plastic strain profiles were measured. Also the strain profiles were calculated using a numerical method based on the method of characteristics and on material properties which are rate sensitive. The reliability of the concepts employed in these calculations was indicated by the good agreement between the measured and calculated strain profiles. Strain rate exponent, defined as the slope of the curve of log stress versus log plastic strain rate, was found by these calculations to increase with increasing strain rate, reaching a value of about 0.04 at a plastic strain rate, reaching a value of about 0.04 at a plastic strain rate of 400/sec. (Author)

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1966
Accession Number
AD0628977

Entities

People

  • J. D. Lubahn
  • R. A. Houidobre

Organizations

  • Colorado School of Mines

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Agreements
  • Materials
  • Mechanical Properties
  • Method Of Characteristics
  • Physical Properties
  • Projectiles
  • Reliability
  • Strain (Mechanics)
  • Strain Rate

Readers

  • Mechanical Engineering/Mechanics of Materials.