PSI - Issue 28

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

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 28 (2020) 171–179

© 2020 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 European Structural Integrity Society (ESIS) ExCo A non linear extension of the Virtual Weld Bead Method which is based on the concepts of the Inherent Strain Method and Strain and Direct Boundary has been developed. Auxiliary elements have been introduced to apply an equivalent load on non linear elements introducing transversal shrinkage as well as angular shrinkage in this first version. A dedicated inverse analysis procedure has been developed to calibrate the equivalent load to be applied and an experimental validation has been performed. The first part of this validation is present focusing on a single welded joint with different clamping conditions, the effect of clamps has been correctly predicted. © 2020 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 European Structural Integrity Society (ESIS) ExCo Keywords: Type your keywords here, separated by semicolons ; 1. Introduction A common expedient to minimize welding distortions is the use of clamps. Clamps are an economical way to limit distortions but introduce residual stresses which could affect the structural integrity introducing flaws. The use 1st Virtual European Conference on Fracture A Novel Method for Welding Residual Deformations Prediction 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 for large structure is limited by computational reasons. Nowadays, experience plays an important role in minimizing distortions and the cost of straightening is considered as intrinsic in the process. A fast but reliable simplified method could increase productivity. On one of the factors significantly influence the welding residual distortions is the welding sequence at the global assembly scale and the presence of clamps.

* Corresponding 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 (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo

2452-3216 © 2020 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 European Structural Integrity Society (ESIS) ExCo 10.1016/j.prostr.2020.10.022