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Fatigue strength of laser-stake welded T-joints subjected to combined axial and shear loads
Publikationstyp
Journal Article
Date Issued
2016-05-01
Sprache
English
Author(s)
TORE-URI
Journal
Volume
60
Issue
3
Start Page
593
End Page
604
Citation
Welding in the world 3 (60): 593-604 (2016-05-01)
Publisher DOI
Scopus ID
Laser-stake welding enables an economic production of all-steel sandwich panels that can be used for steel bridges as well as for decks in roll-on/roll-off ships (ferries). Deck plates of 10 mm thickness can be joined with interior web plates ensuring a weld throat thickness of 2–3 mm. In a research project, fatigue tests were performed with laser-stake welds subjected to axial, shear and multiaxial in-phase loading and assessed by the nominal and the notch stress approach. In addition to possible effects of gaps between deck and web plates or of the steel strength, the application of interaction formulae to laser-stake welds is checked as contained in Eurocode 3 and the IIW recommendations for the fatigue assessment of multiaxial loading. Furthermore, the equivalent von Mises stress is applied using the notch stress approach. In this way, the basis is provided for a safe design of laser-stake-welded T-joints.
Subjects
Computation
Fatigue loading
Fatigue strength
Floors
Laser welding
Notch effect
Sandwich structures
Structural steels