Accession Number:

AD0731674

Title:

Crack Propagation and Arrest in Ship and Other Steels.

Descriptive Note:

Final rept.,

Corporate Author:

BATTELLE MEMORIAL INST COLUMBUS OHIO

Report Date:

1971-08-01

Pagination or Media Count:

63.0

Abstract:

The program was undertaken to explore the possibility of measuring and analyzing crack propagation and arrest. These processes depend on a number of factors 1 the mechanics of the flawed structure or test specimen, 2 the plastically deformed zone at the crack tip, 3 the metals resistance to plastic flow and its rate dependence, and 4 the processes of cleavage and ductile rupture on the microstructural scale. The work sought numerical descriptions of the individual factors with the aim of assembling these into a comprehensive, systems-type analysis of propagation and arrest. The studies employed the DCB double-cantilever-beam test specimen because this configuration offers the possibility of initiating, propagating, and arresting a fast fracture, under controlled conditions, within the confines of a single specimen. Analyses of the stress fields of stationary cracks in DCB specimens are reported. Author

Subject Categories:

  • Metallurgy and Metallography
  • Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE