PSI - Issue 28

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ScienceDirect

Procedia Structural Integrity 28 (2020) 139–145 Structural Integrity Procedia 00 (2020) 000–000 Structural Integrity Procedia 00 (2020) 000–000

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

© 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 Abstract In large companies, warehouse logistics usually include shuttle pallet carriers that are responsible for the transportation of various goods and products. These shuttles run along steel rails, which are usually produced from thin metal sheets that are cold roll-formed into the desired section. These shuttles also work 24 hours a day, 7 days a week, so the rails are very sensitive to fatigue phenomena, caused by the cyclic loading of the moving shuttles, moreover, cracks due to material fatigue have already been observed in these types of rails. In addition, the competitiveness of the European industrial sector is pushing the design of these profiles to lower thickness requirements, which further increases concerns about their fatigue performance. Within this background, the FASTCOLD European project has been carried out, whose research plan consists in developing fatigue design rules for the mentioned appli cations, which are not covered by existing Eurocode 3 rules, which only addresses thick hot-rolled sections. Experimental fatigue testing has been carried out backed by numerical simulations of these tests. A new fatigue setup has been developed to generate representative fatigue cracking to the shuttle cyclic loads. Numerical simulations of the cold roll-forming fabrication process are also being carried out to determine the importance of the residual stresses in the fatigue life of the rail. With the experimental data obtained from fatigue testing backed by numerical simulations, important contributions are made to the design codes (e.g. Eurocode 3) in dealing with the fatigue design of such critical details. c 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY- C-ND license (http: // cr ativecommons.org / licenses / by-nc-nd / 4.0 / ) Pe ie unde responsibility of the European St uctural Integrity Society (ESIS) ExCo. Keywords: Rack structures; Fatigue; Roll-forming; Numerical simulations; Fabrication processes. 1st Virtual European Conference on Fracture Fatigue behavior of cold roll-formed rail profiles for rack structures C.D.S. Souto a, ∗ , V.M.G. Gomes a , M. Figueiredo a , J.A.F.O. Correia a,b , G. Lesiuk c , A.A. Fernandes a,b , A.M.P. De Jesus a,b a Faculty of Engineering of the University of Porto, Porto, Portugal b INEGI, University of Porto, Porto, Portugal c Wrocław University of Science and Technology, Faculty of Mechanical Engineering, Wrocław, Poland Abstract In large companies, warehouse logistics usually include shuttle pallet carriers that are responsible for the transportation of various goods and products. These shuttles run along steel rails, which are usually produced from thin metal sheets that are cold roll-formed into the desired section. These shuttles also work 24 hours a day, 7 days a week, so the rails are very sensitive to fatigue phenomena, caused by the cyclic loading of the moving shuttles, moreover, cracks due to material fatigue have already been observed in these types of rails. In addition, the competitiveness of the European industrial sector is pushing the design of these profiles to lower thickness requirements, which further increases concerns about their fatigue performance. Within this background, the FASTCOLD European project has been carried out, whose research plan consists in developing fatigue design rules for the mentioned appli cations, which are not covered by existing Eurocode 3 rules, which only addresses thick hot-rolled sections. Experimental fatigue testing has been carried out backed by numerical simulations of these tests. A new fatigue setup has been developed to generate representative fatigue cracking to the shuttle cyclic loads. Numerical simulations of the cold roll-forming fabrication process are also being carried out to determine the importance of the residual stresses in the fatigue life of the rail. With the experimental data obtained from fatigue testing backed by numerical simulations, important contributions are made to the design codes (e.g. Eurocode 3) in dealing with the fatigue design of such critical details. c 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 European Structural Integrity Society (ESIS) ExCo. Keywords: Rack structures; Fatigue; Roll-forming; Numerical simulations; Fabrication processes. 1st Virtual European Conference on Fracture Fatigue behavior of cold roll-formed rail profiles for rack structures C.D.S. Souto a, ∗ , V.M.G. Gomes a , M. Figueiredo a , J.A.F.O. Correia a,b , G. Lesiuk c , A.A. Fernandes a,b , A.M.P. De Jesus a,b a Faculty of Engineering of the University of Porto, Porto, Portugal b INEGI, University of Porto, Porto, Portugal c Wrocław University of Science and Technology, Faculty of Mechanical Engineering, Wrocław, Poland

1. Introduction 1. Introduction

It is usual for large companies to resort to pallet-carrying shuttles in order to deal with the logistics of a large warehouse, where these shuttles are responsible for the transportation of various goods and products inside it. In order to move around the warehouse, the shuttles run along steel rails, which are usually produced from thin metal sheets that are cold roll-formed into a specific section. Since the shuttles are usually automated, they work non-stop, It is usual for large companies to resort to pallet-carrying shuttles in order to deal with the logistics of a large warehouse, where these shuttles are responsible for the transportation of various goods and products inside it. In order to move around the warehouse, the shuttles run along steel rails, which are usually produced from thin metal sheets that are cold roll-formed into a specific section. Since the shuttles are usually automated, they work non-stop,

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.2020.10.018 ∗ Corresponding author. Tel.: + 351-925-712-227. E-mail address: csouto@fe.up.pt 2210-7843 c 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 European Structural Integrity Society (ESIS) ExCo. ∗ Corresponding author. Tel.: + 351-925-712-227. E-mail address: csouto@fe.up.pt 2210-7843 c 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 European Structural Integrity Society (ESIS) ExCo.