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Publisher DOI: 10.1111/ffe.13339
Title: Experimental investigation on the influence of welding residual stresses on fatigue for two different weld geometries
Language: English
Authors: Friedrich, Nils 
Keywords: crack propagation; digital image correlation; initiation of macroscopic cracks; longitudinal stiffener; multilayer K-butt weld; stress ratio
Issue Date: 31-Aug-2020
Publisher: Wiley-Blackwell
Source: Fatigue and Fracture of Engineering Materials and Structures 11 (43): 2715-2730 (2020-11-01)
Abstract (english): 
Fatigue & Fracture of Engineering Materials & Structures published by John Wiley & Sons Ltd Fatigue tests on welded small-scale specimens often do not show a distinct residual stress influence. An exception is longitudinal stiffeners, which are therefore frequently used to study the influence of welding residual stresses on fatigue. The results are not directly transferable to other weld geometries because the residual stress distribution depends on the weld geometries. In the presented investigation, fatigue tests on multilayer K-butt weld and longitudinal stiffener specimens were performed. The tests were carried out in the as-welded and stress-relieved conditions at different load ratios. Initiation of macroscopic cracks was detected using digital image correlation. This allowed determining the influence of welding residual stresses on the initiation of macroscopic cracks, crack propagation and total fatigue life for both investigated weld geometries.
DOI: 10.15480/882.3008
ISSN: 8756-758X
Journal: Fatigue & fracture of engineering materials & structures 
Institute: Konstruktion und Festigkeit von Schiffen M-10 
Document Type: Article
Project: Ansatz zur Berücksichtigung von Schweißeigenspannungen bei der Ermüdungsfestigkeitsbewertung mittels direkter numerischer Simulation 
Projekt DEAL 
More Funding information: The presented research was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – EH 485/4-1.
License: CC BY 4.0 (Attribution) CC BY 4.0 (Attribution)
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