CLEAVAGE FRACTURE OF SHIP PLATE HATCH CORNER TESTS

Six full scale specimens, similar in design to a hatch corner of a ship, were constructed from a low carbon, ship quality, semi-killed steel and tested to failure. One tested at 120 deg F gave a shear type fracture. All others tested at room temperature failed with cleavage type fractures. Two which were welded with preheat at 400 deg F showed superior performance, both in strength and energy absorption. Two which were fabricated by riveting gave inferior performance. An investigation was conducted to determine the effects of preheat and a comparison made with the effects of 1000 deg F postheat treatment for 8 hours. Studies were made of quarter scale symmetrical and asymmetrical hatch corner models to determine which type of specimen would best duplicate the stress condition existing in actual ships.

• Corporate Authors:

  University of California, Berkeley

  College of Engineering
  Berkeley, CA  United States  94720

  Ship Structure Committee

  National Academy of Science, 2101 Constitution Avenue, NW
  Washington, DC  United States  20418
• Authors:
  • DeGarmo, E P
  • Meriam, J L
  • Grassi, R C
  • Harman, J W
  • O'Brien, M P
• Publication Date: 1946-7-24

Media Info

• Features: References;
• Pagination: 71 p.

Subject/Index Terms

• TRT Terms: Cleavage fracture; Fracture mechanics; Fracture tests; Hatch covers; Prototype tests
• Identifier Terms: Ship Structure Committee
• Old TRIS Terms: Hatch corners; Hatch stress; Ship plates
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00330974
• Record Type: Publication
• Source Agency: Ship Structure Committee
• Report/Paper Numbers: SSC- 1 Prog Rpt.
• Contract Numbers: NObs-31222
• Files: TRIS
• Created Date: May 21 1981 12:00AM