Accession Number : AD0635766

Title :   CORRELATION OF LABORATORY TESTS WITH FULL SCALE SHIP PLATE FRACTURE TESTS: ANALYSIS OF TRUE-STRESS TRUE-STRAIN DATA ON PROJECT STEELS.

Descriptive Note : Progress rept.

Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK MINERAL INDUSTRIES EXPERIMENT STATION

Personal Author(s) : Klier, E. P. ; Mack,J. O. ; Wagner,F. C. ; Gensamer,M.

Report Date : 21 JUN 1950

Pagination or Media Count : 193

Abstract : The results of a study of the flow and fracture strengths of the project steels was are considered. It appears that the flow- and fracture- strength concept of failure proposed by Ludwik is not adequate to account for the results obtained. The flow properties of the steels was studied as a function of temperature and prestrain. The test results were found to be adequately described by the expression, sigma = sigma sub o delta to the n power, in which sigma and delta are respectively true stress and natural strain, while sigma sub o and n are constants. Sigma sub o has been found to vary regularly with temperature while n has been found to undergo a transition for most of the steels at sufficiently low temperatures. Both sigma sub o and n appear to have fundamental significance and should ultimately be correlated in some manner with the engineering properties of the steels. (Author)

Descriptors :   (*SHIP PLATES, STEEL), (*STEEL, FRACTURE(MECHANICS)), SHIP HULLS, RHEOLOGY, STRAIN(MECHANICS), STRESSES, TRANSITION TEMPERATURE, TENSILE PROPERTIES

Subject Categories : Metallurgy and Metallography
      Marine Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE