| People | Locations | Statistics |
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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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Stoschka, Michael
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2023Effect of Surface Finishing State on Fatigue Strength of Cast Aluminium and Steel Alloyscitations
- 2023Study of Local Fatigue Methods (TCD, N-SIF, and ESED) on Notches and Defects Related to Numerical Efficiencycitations
- 2023Energy-Based Fatigue Assessment of Defect-Afflicted Cast Steel Components by Means of a Linear-Elastic Approachcitations
- 2023A Numerically Efficient Method to Assess the Elastic–Plastic Strain Energy Density of Notched and Imperfective Cast Steel Componentscitations
- 2022Optimization of disc geometry and hardness distribution for better transferability of fatigue life prediction from disc to FZG testscitations
- 2022Fatigue strength study based on geometric shape of bulk defects in cast steelcitations
- 2022A Probabilistic Fatigue Strength Assessment in AlSi-Cast Material by a Layer-Based Approachcitations
- 2020Areal fatigue strength assessment of cast aluminium surface layerscitations
- 2020Validation Study on the Statistical Size Effect in Cast Aluminiumcitations
- 2019Notch Stress Intensity Factor (NSIF)-Based Fatigue Design to Assess Cast Steel Porosity and Related Artificially Generated Imperfectionscitations
- 2019Evaluation of surface roughness parameters and their impact on fatigue strength of Al-Si cast materialcitations
- 2019On the Statistical Size Effect of Cast Aluminiumcitations
- 2019Numerical crack growth study on porosity afflicted cast steel specimenscitations
- 2019Short and long crack growth of aluminium cast alloyscitations
- 2018Application of a area -Approach for Fatigue Assessment of Cast Aluminum Alloys at Elevated Temperaturecitations
- 2018Lifetime assessment of cast aluminium components based on CT-evaluated microstructural defects
- 2018Fatigue strength characterization of Al-Si cast material incorporating statistical size effectcitations
- 2018Surface topography effects on the fatigue strength of cast aluminum alloy AlSi8Cu3citations
- 2018Modification of a Defect-Based Fatigue Assessment Model for Al-Si-Cu Cast Alloyscitations
- 2017Fatigue assessment of welded and high frequency mechanical impact (HFMI) treated joints by master notch stress approachcitations
- 2017Simulation of lamellar cast iron components under TMF-loadscitations
- 2017Microporosity and statistical size effect on the fatigue strength of cast aluminium alloys EN AC-45500 and 46200citations
- 2016Application studies for fatigue strength improvement of welded structures by high-frequency mechanical impact (HFMI) treatmentcitations
- 2016Effect of weld defects on the fatigue strength of ultra high-strength steelscitations
- 2015Fatigue Strength of HFMI-treated and Stress-relief Annealed High-strength Steel Weld Jointscitations
- 2014Fatigue enhancement of thin-walled, high-strength steel joints by high-frequency mechanical impact treatmentcitations
- 2009Influence of welding process parameters on fatigue life by local sub-modelling
- 2009Introduction to an approach based on the (α+β) microstructure of elements of alloy Ti-6Al-4Vcitations
- 2007Fatigue analysis of forged aerospace components based on micro structural parameters
Places of action
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article
Effect of weld defects on the fatigue strength of ultra high-strength steels
Abstract
Enhancing the lightweight potential of mobile steel structures by applying high-strength steels and reducing sheet thicknesses leads to a significant increase of energy effectiveness and a reduction of noxious emissions during operation. However, due to this increase of yield and tensile strength, fracture toughness decreases and notch sensitivity rises. Hence, the local weld geometry becomes more important, especially in case of ultra high-strength steels. This paper deals with the detection and assessment of common geometric weld defects, such as undercuts, and their effect on the fatigue strength of ultra high-strength steel joints. For this purpose, butt joint specimens are welded incorporating ultra high-strength steel as base material. All specimens are judged by visual testing and the detected weld defects undergo an additional surface topography measurement prior to fatigue testing. First, an image processing based Matlab©-Routine is built up to evaluate the local geometrical properties of the weld toe including undercuts. Second, a numerical model of the actual weld geometry is generated. This is utilized to perform numerical analyses in order to compute the actual stress concentration factors as well as fatigue parameters in terms of notch stresses. The experimental work covers fatigue tests of undercut-imperfected and defect-free specimens in order to contribute to the effect of such defects on fatigue life. Finally, an enhanced fatigue assessment of welds with undercuts and high-quality joints is performed based on numerical investigations and validated by experimental results.