FATIGUE TESTS OF SHIP WELDS

The results of fatigue tests of twenty-eight specimens representing typical ship welding problems are described. Stress range of zero-to-30,000 psi tension was applied to 11 1/2 in wide plates having a longitudinal weld in the direction of tension and to 17 in plates with central holes whose boundary was flame cut, flame cut and ground, flame cut and machined, and which had welded reinforcing inserts. Variation in number of weld passes in the longitudinal weld from 1 to 3, each side, is not believed to affect the fatigue behavior significantly, but irregularities such as folds or pits in the weld surface are shown to act as stress raisers and to initiate failure. Tests were made on welds whose surfaces were ground smooth and flush with those of the plate. Two specimens of 50% greater width, and two of another steel, showed no difference in fatigue behavior from the balance of specimens of similar nature. The backstep method of laying weld passes is shown to be superior to the continuous technique. The results of tests of eight specimens with central holes emphasizes the fact that discontinuities of form and stiffness require special treatment to provide paths free of stress raisers. (Author)

• Corporate Authors:

  Cornell University

  School of Civil and Environmental Engineering
  Ithaca, NY  United States  14853
• Authors:
  • Hollister, S C
  • Garcia, J
  • Cuykendall, T R
• Publication Date: 1946-12-13

Media Info

• Pagination: 116 p.

Subject/Index Terms

• TRT Terms: Fatigue (Mechanics); Fatigue tests; Fracture mechanics; Hulls; Loads; Radiography; Reinforcing materials; Steel; Stress cracking; Stress relieving; Stresses; Structural plates; Tests; Texture; Weld tests; Welding; Welds
• Identifier Terms: Ship Structure Committee
• Uncontrolled Terms: Ship hulls
• Old TRIS Terms: Loading mechanics; Plate welding; Ship plates; Stress relief cracking; Weld discontinuity; Weld stresses
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00327716
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: SSC- 7 Prog Rpt.
• Contract Numbers: NOBS-31218, NOBS-34231
• Files: TRIS
• Created Date: Feb 18 1981 12:00AM