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Abstract

This paper clarifies the terminologies used to describe the size effect on fatigue behavior of welded joints. It summarizes the existing research on size effect in the perspective of newly defined terminologies. It identifies knowledge gaps in designing tubular joints using the hot spot stress method, i.e. thin-walled tubular joints with wall thickness less than 4 mm and thick-walled tubular joints with wall thickness larger than 50 mm, or diameter to thickness ratio less than 24. It is the thin-walled tubular joints that are addressed in this paper. It is found that thin-walled tube-plate T-joints do not follow the conventional trend: the thinner the section is, the higher the fatigue life. It is also found that simple extrapolation of existing fatigue design curves may result in unsafe design of thin-walled tube–tube T-joints. The effect of chord stiffness on fatigue behavior of thin-walled tubular T-joints is also discussed.

Item Type:	Article
Authors/Creators:	Mashiri, FR and Zhao, XL and Hirt, MA and Nussbaumer, A
Keywords:	Size effect; thickness effect; welded joints; plate; tube; weld defects; fatigue.
Journal or Publication Title:	International Journal of Structural Stability and Dynamics
Publisher:	World Scientific
ISSN:	0219-4554
DOI / ID Number:	10.1142/S0219455407002228
Additional Information:	© World Scientific Publishing Company
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