FATIGUE ANALYSIS OF A TUBULAR JOINT BROKEN UNDER WAVES AND CURRENTS LOADINGS

A fatigue test set up was designed which was based on waves and currents for breaking tubular specimens. The tubular T-joint was fabricated from circular hollow sections of API standard 5LX steel, and diameters of the chord and brace were 406 and 227 mm respectively. They were welded together by manual arc method according to normal practice for the fabrication of offshore structures. The first tubular joint was broken in 400 days. Nominal stresses were recorded on magnetic tapes. The true stress spectrum at the hot spot was obtained from the records and was used to calculate damage using the various approaches suggested in the literature. Calculation was based on S.N. curves and Miner's rule (fatigue analysis), and (fracture mechanics analysis) by the DnV and the Tomkins and Scott method. Simulation of the crack growth process by Monte Carlo techniques is discussed.

• Supplemental Notes:
  • Proceedings of the Offshore Technology Conference, May 5-8, 1980, Houston, Texas.
• Corporate Authors:

  Offshore Technology Conference

  6200 North Central Expressway
  Dallas, TX  United States  45206
• Authors:
  • Thebault, J
  • Olagnon, M
  • Barnouin, B
• Conference:
  • Proceedings of the Offshore Technology Conference, May 5-8, 1980, Houston, Texas.
• Publication Date: 1980-5

Media Info

• Features: References;
• Pagination: p. 197
• Serial:
  • Volume: 1
  • Issue Number: 3698

Subject/Index Terms

• TRT Terms: Fatigue (Mechanics); Fatigue tests; Fracture mechanics; Joints (Engineering); Loads; Ocean currents; Tubular structures; Water waves; Welds
• Uncontrolled Terms: Welded joints
• Old TRIS Terms: Current forces; Fatigue stress; Joint; Tubular joints; Wave loads
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Materials;

Filing Info

• Accession Number: 00329766
• Record Type: Publication
• Source Agency: Ship Research Institute of Norway
• Files: TRIS
• Created Date: Mar 12 1981 12:00AM