PSI - Issue 38

ScienceDirect Structural Integrity Procedia 00 (2021) 000 – 000 Structural Integrity Procedia 00 (2021) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceD rect Available online at www.sciencedirect.com ScienceDirect

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Procedia Structural Integrity 38 (2022) 457–465

© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers Abstract In the present study, an overview on the fatigue performance of single-sided fillet welds is carried out. Both longitudinal load carrying joints, for instance existing in beam structures and welded hollow sections, and transverse joints are considered in this work. Experimental data of such joints made of mild and ultra-high-strength steel (UHSS) is extracted from existing studies to evaluate the fatigue strength properties. The main characteristics affecting fatigue strength properties of these joints are discussed. Furthermore, the paper evaluates the fatigue strength of single-sided fillet weld joints in comparison with the joints with double sided welds. The experimental results indicate that in the transverse welds, an increase in materia l’s yield strength shows a slight decrease in fatigue strength compared to mild steels, while in the longitudinal load-carrying seams, in the case of continuous weld root geometry, high fatigue strength can be achieved with UHSS materials. The double-sided welds provide one FAT class higher fatigue strength for transverse non-load-carrying joints, obtained in terms of mean fatigue strengths. In addition, in transverse joint configurations, intermediate welding was found to have no detrimental effect on the fatigue performance compared to the joints with continuous welds. In longitudinal load-carrying joints, double-sided welds do not provide any additional benefit unless full penetration and, thus, continuous longitudinal weld root shape is achieved with such weld preparation. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers Keywords: Fatigue; Welded joint; Fillet weld; Transverse weld; Longitudinal weld Abstract In the present study, an overview on the fatigue performance of single-sided fillet welds is carried out. Both longitudinal load carrying joi s, for instanc existing in be m structures and welded hollow sections, an transverse joints are c s dered in this wo k. Experimental dat of such joints m de of mild and ultra-high-strength s eel (UHSS) is extracted from existing studies to evaluate th fatigue strength propert es. The main characteristics affecting fa igu strength prop rties of these joint are discus ed. Furthermor , the paper evaluates the fatigue stre gth of single- ided f llet weld joints in com a ison wit the joints with double sided welds. T ex iment l results indicate that in the transvers we ds, an increa e in materia l’s yield str ngth hows a slight decreas in fatigu str ngth compared to mild s eels, w ile in th longitu in l load-c rryi g seams, in the cas of continuous weld root geometry, high fati ue strength can be achi ved ith UHSS materials. The double-sided welds provide one FAT class higher fatigu str ngth for tr nsv r e non-load-carrying joints, obtained in terms of m an fatigue strengths. In ad iti , in transverse joint configurations, intermediate welding was fou d t have no d trimental ef ect o the fatigu performance c mpared to the joints with continuous w lds. In longitudinal load-carrying joints, oubl -sided welds do not provid any additional benefi unl ss full penetratio and, thus, co tinuous lo gitudinal weld root shape is achiev ith uch weld prepar tion. © 2021 The Author . Publ shed by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review u der re ponsibility of scientific committe of the Fatigu Design 2021 Organ z rs Keywords: Fatigue; Welded joint; Fillet weld; Transverse weld; Longitudinal weld FATIGUE DESIGN 2021, 9th Edition of the International Conference on Fatigue Design Overview on the fatigue strength of single-sided transverse and longitudinal fillet weld joints Antti Ahola a* , Tuomas Skriko b , Timo Björk a a Laboratory of Steel Structures, Lappeenranta-Lahti University of Technology LUT, Yliopistonkatu 34, 53850, Lappeenranta, Finland b Laboratory of Welding Technology, Lappeenranta-Lahti University of Technology LUT, Yliopistonkatu 34, 53850, Lappeenranta, Finland FATIGUE DESIGN 2021, 9th Edition of the International Conference on Fatigue Design Overview on the fatigue strength of single-sided transverse and longitudinal fillet weld joints Antti Ahola a* , Tuomas Skriko b , Timo Björk a a Laboratory of Steel Structures, Lappeenranta-Lahti University of Technology LUT, Yliopistonkatu 34, 53850, Lappeenranta, Finland b Laboratory of Welding Technology, Lappeenranta-Lahti University of Techn logy LUT, Yliopistonkatu 34, 53850, Lappeenranta, Finland

* Corresponding author. Tel.: +358-50-475-2858. E-mail address: antti.ahola@lut.fi * Corresponding author. Tel.: +358-50-475-2858. E-mail ad ress: antti.ahola@lut.fi

2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers 2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review u der responsibility of t scientific committe of the Fatigue Design 2021 Organiz rs

2452-3216 © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the Fatigue Design 2021 Organizers 10.1016/j.prostr.2022.03.046