Accession Number:

AD0784670

Title:

Dynamic Fracture Toughness Measurement.

Descriptive Note:

Final technical rept. May 73-Apr 74,

Corporate Author:

NEWCASTLE-UPON-TYNE UNIV (ENGLAND) DEPT OF METALLURGY AND ENGINEERING MATERIALS

Personal Author(s):

Report Date:

1974-06-01

Pagination or Media Count:

49.0

Abstract:

Combined tensile-impact tests have been performed. It was found that a wide range of crack velocity was encompassed and the detailed crack acceleration behavior was unpre-dictable. An improved crack-velocity monitoring procedure for single-shot oscilloscope work has been devised that gives an extended record time at fast sweep rates. This was accomplished by using the signal to modulate the radius of a circular time base and the trigger to intensify a pre-blanked trace. Calibration procedures utilising the self-resistance of the cracking specimen to monitor crack growth have been completed and a recording system has been developed to monitor pretrigger and post trigger crack velocity data. Author, modified-PL

Subject Categories:

  • Ceramics, Refractories and Glass
  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE