FATIGUE LIFE PREDICTION OF TUBULAR NODES

Large scale specimens of x-joints were tested in fatigue, either in tension or in in-plane bending (R=0.1). Similar specimens (size ratio 1/2) were tested in order to estimate the scale effect. Gamma was chosen here from 8 to 12, at the limit of the validity of any shell theory. In each node, one brace joint was heat treated and the other was left as-welded. The specimens were instrumented by strain gauges. During monotonic static loading the measured distribution of stresses shows that the effective stress concentration factor can be defined as a product of two factors. During the fatigue test, the crack growth and the evolution of strains along the weld tow were monitored. On the basis of the obtained results an elementary theoretical model for life prediction is proposed.

Media Info

  • Pagination: p. 207
  • Serial:
    • Volume: 1
    • Issue Number: 3699

Subject/Index Terms

Filing Info

  • Accession Number: 00329772
  • Record Type: Publication
  • Source Agency: Ship Research Institute of Norway
  • Files: TRIS
  • Created Date: Mar 12 1981 12:00AM