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Re-analysis of fatigue data for welded joints using the notch stress approach

✍ Scribed by M.M. Pedersen; O.Ø. Mouritsen; M.R. Hansen; J.G. Andersen; J. Wenderby

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
928 KB
Volume
32
Category
Article
ISSN
0142-1123

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✦ Synopsis

Experimental fatigue data for welded joints have been collected and subjected to re-analysis using the notch stress approach according to IIW recommendations. This leads to an overview regarding the reliability of the approach, based on a large number of results (767 specimens). Evidently, there are some limitations in the approach regarding mild notch joints, such as butt joints, which can be assessed non-conservatively. In order to alleviate this problem, an increased minimum notch factor of K w P 2.0 is suggested instead of the current recommendation of K w P 1.6. The data for most fillet-welded joints agree quite well with the FAT 225 curve; however a reduction to FAT 200 is suggested in order to achieve approximately the same safety as observed in the nominal stress approach.

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