In a welded joint, mechanical properties of weld metal and heat-affected zone are different from those of the base metal. Brittle fracture initiation behavior of the weldments will be different from that of the homogeneous and isotropic material. In the present paper, attention in focussed on brittle fracture initiation behavior of the weldments having heteorgeneity under tension parallel to the weld line. Deep notch tests of model specimens having mechanical heterogeneity near the crack tip were carried out. Effects of mechanical heterogeneity on deformation behavior of crack tip and brittle fracture strength were clarified. Expanding Dugdal's idea, the relationship between the applied stress and crack opening displacement of notched specimens having mechanical heterogeneity can be calculated, and those calculated results agree well with the experimental values. The estimation of fracture stress for this heterogeneous material can be made by COD-criterion.

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    Society of Naval Architects of Japan

    23 Shiba-kotohiracho, Minato-ku
    Tokyo 135,   Japan 

    Society of Naval Architects of Japan

    15-16, Toranomon, 1-chome, Minato-ku
    Tokyo,   Japan 
  • Authors:
    • Satoh, K
    • Toyoda, M
    • Arimochi, K
  • Publication Date: 1973-12


  • Japanese

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Filing Info

  • Accession Number: 00072631
  • Record Type: Publication
  • Source Agency: Society of Naval Architects of Japan
  • Files: TRIS
  • Created Date: Dec 19 1974 12:00AM