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

The results of a study of the flow and fracture strengths of the project steels 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 were 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)

• Supplemental Notes:
  • See also AD-635 794.
• Corporate Authors:

  Pennsylvania State University, University Park

  School of Mineral Industries, Experiment Station
  University Park, PA  United States  16802
• Authors:
  • Klier, E P
  • Mack, J O
  • Wagner, F C
  • GENSAMER, M
• Publication Date: 1950-6-21

Media Info

• Pagination: 65 p.

Subject/Index Terms

• TRT Terms: Deformation curve; Fracture mechanics; Fracture tests; Hulls; Materials tests; Rheology; Steel; Steel plates; Strain (Mechanics); Stresses; Structural analysis; Tensile properties; Transition point
• Identifier Terms: Ship Structure Committee
• Uncontrolled Terms: Ship hulls
• Old TRIS Terms: Ship plates; Steel testing
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00327700
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: SSC- 19 Prog Rpt.
• Contract Numbers: NOBS-31217, NOBS-50148
• Files: TRIS
• Created Date: Feb 18 1981 12:00AM