PSI - Issue 25

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 25 (2020) 201–208

© 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the VCSI1 organizers © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the VCSI1 organizers Abstract Among the various t chniqu s employed t increase the fatigu strengt of a welded joint, the TIG dressing techn que acts on th w ld g ometry re-melting the w ldi g toe to eliminate the presence of sharp V-no ches. The main aim of thi work is to investiga e he ef ect of the TIG dressing tec nique on the fatigue behavior of w lded joints summarizing th results of experimental tests taken from the literatur through the Strain Energy Density me od. The exp rimental tests considered were performed both n a - welded and TIG-dressed joints in order to better understand th improvement that uch a technique l ads to the w l d joints. Finally, the data were summariz d thro gh the Strain Energy Density t chnique to show that the same f tigue curve, defin d in term of Strain En rgy Density versus number of cycles, obtain for the as-welded joints could be used also for the TIG-dressed joints being the method not dependent on the geometry considered. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under C BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) 1st Virtual Conference on Structural Integrity - VCSI1 Evaluation of the Effect of the TIG-Dressing Technique on Welded Joints through the Strain Energy Density Method Pietro Foti * , Filippo Berto Norwegian University of Science and Technology, MTP Gløshaugen, Richard Birkelands vei 2B, Trondheuim 7491, Norway Abstract Among the various techniques employed to increase the fatigue strength of a welded joint, the TIG dressing technique acts on the weld geometry re-melting the welding toe to eliminate the presence of sharp V-notches. The main aim of this work is to investigate the effect of the TIG dressing technique on the fatigue behavior of welded joints summarizing the results of experimental tests taken from the literature through the Strain Energy Density method. The experimental tests considered were performed both on as welded and TIG-dressed joints in order to better understand the improvement that such a technique leads to the welded joints. Finally, the data were summarized through the Strain Energy Density technique to show that the same fatigue curve, defined in terms of Strain Energy Density versus number of cycles, obtained for the as-welded joints could be used also for the TIG-dressed joints being the method not dependent on the geometry considered. 1st Virtual Conference on Structural Integrity - VCSI1 Evaluation of the Effect of the TIG-Dressing Technique on Welded Joints through the Strain Energy Density Method Pietro Foti * , Filippo Berto Norwegian University of Science and Technology, MTP Gløshaugen, Richard Birkelands vei 2B, Trondheuim 7491, Norway

Keywords: Strain Energy Density method; TIG dressing; fatigue assessment. Peer-review under responsibility of the VCSI1 organizers Keywords: Strain Energy Density method; TIG dressing; fatigue assessment.

Nomenclature E Nomenclature E

Young’s modulus Y ung’s modulus

mode 1 and 2 functions in the SED expression for sharp V-notches. Available in literature mode 1 and 2 functions in the SED expression for sharp V-notches. Available in literature

1 2 , I I 1 2 , I I

* Corresponding author. E-mail address: pietro.foti@ntnu.no * Correspon ing autho . E-mail address: pietro.foti@ntnu.no

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the VCSI1 organizers 2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an ope acces article under C BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Peer-review under responsibility of the VCSI1 organizers

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the VCSI1 organizers 10.1016/j.prostr.2020.04.024