PAST STRUCTURAL STUDIES RELATED TO THE SHIP AND SHIP COMPONENTS AND FOR DETERMINING LOADS AND STRAINS ON SHIPS AT SEA

(1) Basic heart of plate stress distribution across a ship cross section complies well with simple beam theory but with local deviations sometimes evident in such locations as fore and aft stiffner attachments to plating. (2) While both riveted and welded ships experience occasional structural difficulties, they have been more numerous and severe in welded ships. In welded vessels cracks appeared both to initiate and to propagate more readily. (3) Poor welding workmanship, poor design details, inadequate material or physical and metallurgical notches do not appear to satisfactorily provide the full explanation of welded ship failures. (4) Plating panels which are unfair in the unloaded condition of the ship are more prevalent in welded construction than in riveted. When loaded, the stress sustained by such panels depart from the stress distribution predicted by the simple beam theory and cause a lack of uniformity of stress that may contribute to crack initiation and crack propagation. (5) A means of estimating ship bending moments making possible more precise evaluation of the variable dynamic nature of the loading is desirable. Shock loading design criteria are particularly necessary.

• Corporate Authors:

  Massachusetts Institute of Technology

  Department of Civil Engineering, 77 Massachusetts Avenue
  Cambridge, MA  United States  02139

  Ship Structure Committee

  National Academy of Science, 2101 Constitution Avenue, NW
  Washington, DC  United States  20418
• Authors:
  • EVANS, J H
  • Jaeger, H E
  • Verbeek, H A
  • Turnbull, J
• Publication Date: 1953-12-15

Media Info

• Pagination: 65 p.

Subject/Index Terms

• TRT Terms: Bending moments; Cracking; Deformation curve; Failure; Hulls; Plate bearing test; Structural mechanics
• Identifier Terms: Ship Structure Committee
• Uncontrolled Terms: Crack initiation; Crack propagation; Structural failures
• Old TRIS Terms: Hull bending moments
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00331006
• Record Type: Publication
• Source Agency: Ship Structure Committee
• Report/Paper Numbers: SSC- 62
• Contract Numbers: NObs-50148
• Files: TRIS
• Created Date: May 21 1981 12:00AM