AN ANALYSIS ON APPLICABILITY OF FATIGUE DATA TO DESIGN OFFSHORE TUBULAR JOINTS

Fatigue strength of welded tubular joints is one of the most important items in the design of offshore structures. Various design formulas have been proposed both on the stress concentration factors and on the fatigue failure life. However, most of these design curves do not involve any information on the relationship between the crack initiation life N sub c and the failure life N sub f, nor on the relationship between the fatigue design curves and the detailed procedure of hot spot stress estimation. This paper presents a re-analysis of fatigue data of various welded tubular joints obtained in Japan. The relationship between the fatigue crack initiation life N sub c and the failure life N sub f was examined in wide range of fatigue life. Scatters in fatigue life estimation were also examined in relation with various procedures of hot spot stress estimation: 1) measurement, 2) finite element method, 3) Beale's formulas and 4) Kuang's formulas. Applicability to design is discussed with reference to the confidence limits of fatigue lives N sub c and N sub f.

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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:
    • IWASAKI, T
    • ASANO, K
    • KATOH, A
    • Kawahara, M
  • Publication Date: 1980-6

Language

  • Japanese

Media Info

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Filing Info

  • Accession Number: 00319526
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 8 1980 12:00AM