Fatigue tests on welded tubular t-joints with equal brace and chord diameters

Conference · Sun May 01 04:00:00 EDT 1983 · Offshore Technol. Conf.; (United States)

OSTI ID:5413532

Wylde, J G

This paper describes the results of fatigue tests which have been carried out on welded tubular T-joints with equal brace and chord diameters (BETA = 1) as part of the United Kingdom Offshore Steels Research Programme. Specimens with chord diameters of 168mm and 457mm have been tested. This geometry is not covered by the majority of parametric equations available for the prediction of stress concentration factors in tubular joints. The present results show that the SCF in these joints is dependent on the weld profile. The fatigue results show an influence of specimen size and are adequately covered by existing design curves. Of particular interest are the fatigue crack developments in the 457mm diameter joints, which show extensive weld inter-run cracking on many specimens in preference to weld toe cracking. This suggests that weld toe grinding alone may not be effective in improving fatigue strength for joints of this geometry.

• Research Organization: The Welding Institute
• OSTI ID: 5413532
• Report Number(s): CONF-830514-
• Conference Information: Journal Name: Offshore Technol. Conf.; (United States) Journal Volume: 2
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420206* -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
423000 -- Engineering-- Marine Engineering-- (1980-)
CRACK PROPAGATION
FATIGUE
JOINTS
MECHANICAL PROPERTIES
OFFSHORE OPERATIONS
OFFSHORE PLATFORMS
TESTING
WELDED JOINTS