A STUDY OF SUBCRITICAL CRACK GROWTH IN SHIP STEELS

The report presents an evaluation of the potential problems associated with crack initiation and subcritical crack growth in high strength, low alloy steels used in welded ship structure. An interpretive review of the state-of-the-art is given, emphasizing design tools that are available and their potential for use in fail safe or safe crack growth ship design philosophy. A crack initiation and crack growth criterion is presented, which permits welded ship structure to be designed with confidence that serious failures can be avoided, while at the same time full use of the attractive static properties of HSLA steels can be exploited. The report also includes a list of problem areas in need of further clarification in order to enhance confidence in the proposed criterion.

• Corporate Authors:

  Southwest Research Institute

  6220 Culebra Road, P.O. Drawer 28510
  San Antonio, TX  United States  78228-0510

  Ship Structure Committee

  National Academy of Science, 2101 Constitution Avenue, NW
  Washington, DC  United States  20418

  Naval Ship Engineering Center

  3700 East-West Highway
  Hyattsville, MD  United States  20782
• Authors:
  • Francis, P H
  • Lankford Jr, J
  • Lyle Jr, F F
• Publication Date: 1974-6

Media Info

• Pagination: 176 p.

Subject/Index Terms

• TRT Terms: Alloy steel; Cracking; Design; Failure; Fatigue cracking; Fracture mechanics; High strength steel; Joints; Low alloy steel; Mechanical fatigue; Ship structural components; Weldments; Welds
• Identifier Terms: Ship Structure Committee
• Uncontrolled Terms: Crack initiation; Crack propagation; Design criteria; Welded joints
• Old TRIS Terms: High strength alloys
• Subject Areas: Design; Marine Transportation; Materials;

Filing Info

• Accession Number: 00092194
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: SSC-251 Final Rpt.
• Contract Numbers: N00024-73-C-5199
• Files: NTIS, TRIS
• Created Date: Oct 18 1976 12:00AM