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

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Procedia Structural Integrity 25 (2020) 149–158

© 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 The model as be n validat d on steel conne tion consisting of a ound 140 welds. Preliminary results have been reported. It was found that the dir ction of deformation is predicted as well as th order of magnitude. The realized assembly includes scatter in the welding parameters due to manual welding and also som exception in the number of runs utilized. Because of the FE model is linear elastic, the welding s qu c could not be opt mized. However, production problems could be identified beforehand, and clamps be introduced at the expense of increasing residual stresses. © 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 Estimation of multi-pass welds deformations with Virtual Weld Bead method Romanin Luca a *, Ferro Paolo a , Berto Filippo b a University of Padova, Depatement of Engineering and Management, Stradella San Nicola 3, 36100 Vicenza, Italy b NTNU, Department of Mechanical and Industrial Engineering, Richard Birkelands vei 2b, 7491 Trondheim, Norway Abstract Prediction of welding deformations using Computational Welding Mechanics in fields like shipbuilding and steel construction is limited by numerical reasons. Parallelization does not scale well with non-linear mechanical problems, therefore residual deformations on large structures could only be predicted with simplified methods. A multitude of methods have been proposed in literature but few of them have found an industrial application. In this work, a method is proposed which is more readily implementable in a general purpose FE code. Equivalent loads are calibrated using an inverse analysis procedure starting from reference deformation data derived from testing or accurate numerical simulations. The developed inverse analysis procedure allows speeding the calibration phase. The model has been validated on a steel connection consisting of around 140 welds. Preliminary results have been reported. It was found that the direction of deformation is predicted as well as the order of magnitude. The realized assembly includes scatter in the welding parameters due to manual welding and also some exception in the number of runs utilized. Because of the FE model is linear elastic, the welding sequence could not be optimized. However, production problems could be identified beforehand, and clamps be introduced at the expense of increasing residual stresses. 1st Virtual Conference on Structural Integrity - VCSI1 Estimation of multi-pass welds deformations with Virtual Weld Bead method Romanin Luca a *, Ferro Paolo a , Berto Filippo b a University of Padova, Dep tement of E gineering and Ma agement, Strad l San Nicola 3, 36100 Vicenza, Italy b NTNU, Department of Mechanical and Industrial Engineering, Richard Birkelands vei 2b, 7491 Trondheim, Norway Abstract Prediction of weld ng d formations using C mputatio al Welding Mechanics in fi lds like shipbuilding and steel construction is limited by numerical reasons. Parallelization does not scale well with n n-linear mechanical problems, th r fore re i ual deformations on large structures could only be pred cted with s mplified meth ds. A ultitude of metho s have been propose in literatur but few of th m have found an industrial app ication. In this work, a method i propo ed which is more readily impl m ntable in a gener l pu pose FE code. Equiv lent loads ar calibrated usi g an invers analysis p ocedure tarting from reference deformation dat derived from testing or accurate numerical simulations. The developed inverse analysis procedure allows sp eding the c libr tion pha .

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Keywords: Welding Distortion; Inverse Analysis; Inherent Strain; Equivalent Load Keywords: Welding Distortion; Inverse Analysis; Inherent Strain; Equivalent Load

* Corresponding author. E-mail address: luca.romanin@phd.unipd.it * Correspon ing author. E-mail address: luca.romanin@phd.unipd.it

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.2020.04.018