Accession Number:

AD0628865

Title:

THE MECHANICAL PROPERTIES OF COPPER AT HIGH STRAIN RATES. VOLUME 1. THE EFFECT OF STRAIN RATE ON THE FLOW STRESS OF COPPER

Descriptive Note:

Technical rept., 1 May 1963-28 Feb 1965

Corporate Author:

COLORADO SCHOOL OF MINES RESEARCH FOUNDATION INC GOLDEN

Report Date:

1966-02-01

Pagination or Media Count:

52.0

Abstract:

An experimental method of determining dynamic flow stress where the stress is homogeneous is developed using a pendulum bar suspension system. A small specimen is mounted on the end of one of the bars and the other bar is impacted on the free and of the specimen. For copper, the dynamic stress is 29 larger than the static stress for a strain rate of about 100sec or an increase in strain rate of about 5 orders of magnitude. For various tests, the increase in dynamic stress over the static value varied from 17 to 45. This variation is comparable with the expected scatter for a typical test plus or minus 10 predicted from the uncertainties in measurement.

Subject Categories:

  • Metallurgy and Metallography
  • Test Facilities, Equipment and Methods
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE