Fricke, WolfgangWolfgangFrickeKahl, AdrianAdrianKahl2024-09-242024-09-24200710th International Symposium on Practical Design of Ships and other Floating Structures, PRADS 2007. - Vol. 2. - Seite 1071-10790-943870-05-4978-0-943870-05-2https://hdl.handle.net/11420/49197The fatigue strength of welded ship structural details can be assessed by local stress approaches. In contrast to the widely applied nominal and structural hot-spot stress approaches, the notch stress approach can explicitly consider the shape of the weld. Usually a quite simplified weld profile is assumed, but it is also possible to reproduce the real weld profile, if data is available. In the paper, the notch stress approach is described and techniques are introduced for measuring the weld profile, focusing especially on the laser-based sheet-oflight measurement system. Taking different bracket connections as an example, which have been analyzed in a recent research project, the derivation of a realistic weld profile from the laser measurement is described, introducing a fictitious notch radius to account for micro-support effects of the material. The so-called effective notch stress is then analyzed using finiteelement submodels of the coarse bracket models. The fatigue test results are compared with design S-N curves based on the computed effective notch stresses as well as with the structural hot-spot stresses derived from the coarse models. Finally, conclusions are drawn with regard to the practical application in ship structural design.enBracketFatigueLocal stressShip structural detailStructural hot-spot stressWelded jointWeld profileTechnology::620: EngineeringConference PaperConference Paper