COMPRESSIVE STRENGTH OF SHIP HULL GIRDERS--PART III--THEORY AND ADDITIONAL EXPERIMENTS

A phenomenological theory has been developed for predicting the ultimate strength of rectangular structural plates loaded in uniaxial longitudinal compression, uniaxial transverse compression and biaxial compression. The effects of normal pressure also were considered. The theory was found to be in reasonable agreement with experimental data. Certain areas of the theory and some of the experiments require additional study. The longitudinal compression theory was found to agree well with corresponding theories of other investigators. However, the new theory employs the detailed stress-strain curve for a given material, which the others do not, and demonstrates that, in general, strength prediction requires a curve for each structural material. The commonly used parameter, (b/t)(sigma sub cy/e) to the 1/2 power, is shown not to be universally employable across the total material spectrum as the factor identifying ultimate strength. Other results of broad interest are the demonstration of the applicability of a biaxial plasticity law to biaxial strength theory and the delineation of a method for selecting an optimum material for compression strength. The use of stress-strain curves for strain analysis of critical and ultimate strengths is described. They were employed to construct theoretical strength curves. Theoretical relations and corresponding curves have been developed for perfect plates. The effects of strength degrading factors are discussed and the analysis of residual stress effects is included.

• Supplemental Notes:
  • Also available from NTIS, AD-A047115/1ST.
• Corporate Authors:

  Naval Ship Engineering Center

  3700 East-West Highway
  Hyattsville, MD  United States  20782
• Authors:
  • BECKER, H
  • Colao, A
• Publication Date: 1977-4

Media Info

• Features: References;
• Pagination: 66 p.

Subject/Index Terms

• TRT Terms: Compressive strength; Girders; Hulls; Plasticity; Residual stress; Strength of materials; Structural analysis
• Identifier Terms: Ship Structure Committee
• Old TRIS Terms: Hull girders; Residual stresses; Strength analysis
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00167720
• Record Type: Publication
• Source Agency: Naval Sea Systems Command
• Report/Paper Numbers: SSC-267 Final Rpt.
• Contract Numbers: N00024-72-C-5565
• Files: TRIS
• Created Date: Dec 27 1977 12:00AM