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EFFECT OF MECHANICAL HETEROGENEITY ON BRITTLE FRACTURE BEHAVIOR

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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Corporate Authors:
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

Language

Japanese

Media Info

Features: References;
Pagination: p. 395-403
Serial:
- Journal of the Society of Naval Architects of Japan
- Volume: 134
- ISSN: 0514-8499

Subject/Index Terms

TRT Terms: Cracking; Fracture mechanics; Heat affected zone (Metals); Joints; Measurement; Welds
Uncontrolled Terms: Welded joints
Old TRIS Terms: Crack opening measurement
Subject Areas: Marine Transportation; Materials;

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