ASSESSING FRACTURE TOUGHNESS FOR SHIPBUILDING

Fracture toughness of welded joints is an important factor in the design and fabrication of welded structures, and several criteria may be applied in its evaluation. The Authors, of Mitsui's Chiba Laboratory, discuss stress intensity factor (K), crack opening displacement (delta), and the J-integral as fracture-toughness criteria, together with the correlation of the three in relation to hull structures. It is found that the delta fracture criterion is more suitable than the other two for use in the design of welded hull structures. This criterion has the merits of simplicity in testing, ease of adoption, and availability of a large store of experimental data. Studies by the Shipbuilding Research Association of Japan have shown that welding-heat input and the welding process significantly influence the fracture toughness values of K5D steel, but their effect of KAS steel is negligible (both are C--Mn steels). Welding residual stress and thermal strain have a significant influence on the fracture toughness of welded joints in hull structural steels.

  • Corporate Authors:

    IPC Science and Technology Press Limited

    IPC House, 32 High Street
    Guildford, Surrey  England 
  • Authors:
    • Kishimoto, K
    • Indow, H
    • Matsushita, H
  • Publication Date: 1979-12

Media Info

  • Features: References;
  • Pagination: p. 725
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00310899
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: May 7 1980 12:00AM