Accession Number : AD0731674

Title :   Crack Propagation and Arrest in Ship and Other Steels.

Descriptive Note : Final rept.,

Corporate Author : BATTELLE MEMORIAL INST COLUMBUS OHIO

Personal Author(s) : Hahn,G. T. ; Hoagland,R. G. ; Mincer,P. N. ; Rosenfield,A. R. ; Sarrate,M.

Report Date : AUG 1971

Pagination or Media Count : 63

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 metal's 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)

Descriptors :   (*STEEL, CRACK PROPAGATION), (*SHIP PLATES, STEEL), FRACTURE(MECHANICS), INHIBITION, SHIP STRUCTURAL COMPONENTS

Subject Categories : Metallurgy and Metallography
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE