SYMPOSIA PAPER Published: 01 January 1990

Theoretical and Experimental Analyses of Surface Fatigue Cracks in Weldments


The stress-intensity factor for a semi-elliptical surface crack in T-butt welded joints has been studied by using the weight function approach. The weight functions for cracks in welded joints have been derived by employing the method proposed by Petroski-Achenbach. The calculated stress-intensity factors were compared with those obtained from the variable-amplitude fatigue tests conducted on a series of T-butt welded joints. It has been shown that the weight functions provided sufficiently accurate solutions, in terms of the agreement between the calculated and measured stress-intensity factors and fatigue crack propagation lives. The method proved to be useful in studying weld plate thickness and weld geometry effects on fatigue crack growth in welded joints.

Author Information

Niu, X
University College London, London, U.K.
Glinka, G
University of Waterloo, Waterloo, Ontario, Canada
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Developed by Committee: E08
Pages: 390–413
DOI: 10.1520/STP23445S
ISBN-EB: 978-0-8031-5121-5
ISBN-13: 978-0-8031-1284-1