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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Eder, Martin Alexander
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2024Bayesian optimization-based prediction of the thermal properties from fatigue test IR imaging of composite couponscitations
- 2024In-situ and adhesive repair of continuous fiber composites using 3D printingcitations
- 2024Coupled heat transfer–crystallization analysis in continuous carbon fiber-reinforced thermoplastic composites 3D printing: simulation and experimental validation
- 2024Microstructural Evolution During Welding of High Si Solution-Strengthened Ferritic Ductile Cast Iron Using Different Filler Metalscitations
- 2024An experimentally validated thermomechanical model for a parametric study on reducing residual stress in cast iron repair welding
- 2023Corrosion surface morphology-based methodology for fatigue assessment of offshore welded structurescitations
- 2023Thermomechanical modeling and experimental study of a multi-layer cast iron repair welding for weld-induced crack predictioncitations
- 2022Effect of manufacturing defects on fatigue life of high strength steel bolts for wind turbinescitations
- 2022Corrosion Fatigue
- 2019Multiaxial Stress Based High Cycle Fatigue Model for Adhesive Joint Interfacescitations
- 2018An Improved Sub-component Fatigue Testing Method for Material Characterizationcitations
- 2018Effects of Coatings on the High-Cycle Fatigue Life of Threaded Steel Samplescitations
- 2015Fracture analysis of adhesive joints in wind turbine bladescitations
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article
Effect of manufacturing defects on fatigue life of high strength steel bolts for wind turbines
Abstract
This work investigates the effect of manufacturing defects induced by thread rolling on the high-cycle fatigue life of M30 class 10.9 stud bolts. High-cycle fatigue tests of two batches of nominally identical bolts show significant differences in fatigue performance between the batches. Scanning electron microscopy characterisation of defects in the form of rolling-induced microcracks in the thread root reveals a clear correlation between the defect size and the fatigue life of the investigated bolts. It is demonstrated that initial cracks present in the stud threads have a considerable effect on the slope of S-N curves. Numerical fatigue analysis shows good agreement with the experimental data. Electron backscatter diffraction is used to establish a characteristic length of microstructurally short defects in the tempered martensite microstructure. The obtained results shed light on the definition of critical manufacturing defect sizes in bolts as an essential parameter for quality control in manufacturing process.