PSI - Issue 28

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 28 (2020) 239–252

© 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 © 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 of the studied datas t. Fin lly the diff re t model are used to estimate the fatigue life of a weld etail that is part of a crane runw y girder. A much larger (relative) discrep ncy is observed between the lifetime predictions of the different models for a realistic load case than for simple two-level block loads. © 2020 The Authors. Published by ELSEVIER B.V. This is an ope acces article under CC BY-NC-ND license (https:// r ativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the European Structural Integrity Society (ESIS) ExCo 1st Virtual European Conference on Fracture Modeling nonlinear fatigue damage accumulation in a welded runway girder Kris Hectors a,b,* , Wim De Waele b a SIM vzw, Tech Lane Ghent Science Park / Campus A 48, BE-9052, Zwijnaarde, Belgium b Ghent University, Faculty of Engineering and Architecture, Department of Electromechanical, Systems and Metals Engineering, Laboratory Soete, Belgium Abstract Due to its inherent linear nature, Miner’s damage accumulation rule is widely known to produce unsatisfactory results for lifetime prediction under variable amplitude loading. This can be attributed to its incapability of accounting for load sequence and load interaction effects. In this study, one piece-wise linear and three non-linear damage accumulation models have been implemented in a numerical framework for fatigue lifetime assessment of welded details of industrial assets. Lifetime predictions obtained by these models are first compared to lifetime predictions using Miner’s rule and to experimental data of two-level loading sequences. The results reveal that the studied damage models perform better than Miner’s rule for two-level load sequences within the scope of the studied dataset. Finally the different models are used to estimate the fatigue life of a weld detail that is part of a crane runway girder. A much larger (relative) discrepancy is observed between the lifetime predictions of the different models for a realistic load case than for simple two-level block loads. 1st Virtual European Conference on Fracture Modeling nonlinear fatigue damage accumulation in a welded runway girder Kris Hectors a,b,* , Wim De Waele b a SIM vzw, Tech Lane Ghent Science Park / Campus A 48, BE-9052, Zwijnaarde, Belgium b Ghent University, Faculty of Engineering and Architecture, Department of Electromechanical, Systems and Metals Engineering, Laboratory Soete, Belgium Abstract Due to its inherent linear n ture, Miner’s damage a cumul tion rule is widely known to produce unsatisfactory r s lts for lifetime predicti under variable amplitud loading. This c n be att ibuted to its incap bility of accou ting for load sequence and loa teraction effects. In this study, one piece-wise linear a d thre non-linear damage accumula ion models have bee implem nted in a numerical framew rk for fatigu lifetim assessment of welded details of industrial assets. Life ime pr dictions obtained by these models ar first compared to lifetim pre ictions using Miner’s rule and to experimental data f two-level load ng sequences. The re lts reveal that the studi d damage els p rform better than Miner’s ru e for two-level load sequences within the scope

Keywords: Fatigue; Non-linear damage accumulation; Miner; Damage models Keywords: Fatigue; Non-linear damage accumulation; Miner; Damage models

* Corresponding author. E-mail address: Kris.Hectors@ugent.be * Corresponding author. E-mail address: Kris.Hectors@ugent.be

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

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.2020.10.030