PSI - Issue 61

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ScienceDirect

Procedia Structural Integrity 61 (2024) 315–321 Structural Integrity Procedia 00 (2024) 000–000 Structural Integrity Procedia 00 (2024) 000–000

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

© 2024 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 scientific committee of IWPDF 2023 Chairman © 2024 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 scientific committee of IWPDF 2023. Keywords: o ff shore pipeline; JCO-E fabrication; cold-forming process; external pressure; collapse Abstract In the present work, the JCO-E fabrication process is numerically simulated using advanced finite element tools for the case of a thick-walled 30-inch-diameter pipe, which is candidate for deep water installation. Subsequently, the structural performance of the line pipe under external pressure is investigated in a unified approach. Uniaxial tests are performed to obtain the material properties used in the finite element model, which are representative of the loading history that the plate is subjected during the process. The finite element model is validated with geometric measurements from the actual pipe fabricated in the pipe mill. The e ff ect of the expansion level on the properties of the final product is investigated through extensive numerical studies. The results have shown that there exists an optimum expansion range for achieving the minimization of the geometric imperfections of the final product and the maximization of the collapse capacity of the pipe. © 2024 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 scientific committee of IWPDF 2023. Keywords: o ff shore pipeline; JCO-E fabrication; cold-forming process; external pressure; collapse 3rd International Workshop on Plasticity, Damage and Fracture of Engineering Materials (IWPDF 2023) Finite element analysis of JCO-E fabrication process and its influence on the collapse capacity of o ff shore pipelines Ilias Gavriilidis a, ∗ , Aris G. Stamou a , Konstantinos Antoniou a , Spyros A. Karamanos a a Department of Mechanical Engineering, University of Thessaly, Volos, Greece Abstract In the present work, the JCO-E fabrication process is numerically simulated using advanced finite element tools for the case of a thick-walled 30-inch-diameter pipe, which is candidate for deep water installation. Subsequently, the structural performance of the line pipe under external pressure is investigated in a unified approach. Uniaxial tests are performed to obtain the material properties used in the finite element model, which are representative of the loading history that the plate is subjected during the process. The finite element model is validated with geometric measurements from the actual pipe fabricated in the pipe mill. The e ff ect of the expansion level on the properties of the final product is investigated through extensive numerical studies. The results have shown that there exists an optimum expansion range for achieving the minimization of the geometric imperfections of the final product and the maximization of the collapse capacity of the pipe. 3rd International Workshop on Plasticity, Damage and Fracture of Engineering Materials (IWPDF 2023) Finite element analysis of JCO-E fabrication process and its influence on the collapse capacity of o ff shore pipelines Ilias Gavriilidis a, ∗ , Aris G. Stamou a , Konstantinos Antoniou a , Spyros A. Karamanos a a Department of Mechanical Engineering, University of Thessaly, Volos, Greece The JCO-E process is an e ffi cient and cost-e ff ective method for fabricating large-diameter line pipes, which are candidate for deep-water o ff shore applications. This method is a modified version of the UOE process, which is a widely used method in pipe manufacturing. The e ff ects of manufacturing process on the mechanical properties of cold-formed pipes were firstly reported by Kyriakides et al. (1991), where the UOE process was simulated using an analytical formulation that describes the kinematics of the fabrication process. This work demonstrated the significant impact of the geometric and material imperfections due to the cold forming process on the collapse pressure of the pipe in deep water applications. Similar conclusions were also reached in other works that focus on the manufacturing process of UOE (Herynk et al., 2007; Toscano et al., 2007; Chatzopoulou et al., 2016) and JCO-E pipes (Antoniou et al., 2019). The JCO-E process is an e ffi cient and cost-e ff ective method for fabricating large-diameter line pipes, which are candidate for deep-water o ff shore applications. This method is a modified version of the UOE process, which is a widely used method in pipe manufacturing. The e ff ects of manufacturing process on the mechanical properties of cold-formed pipes were firstly reported by Kyriakides et al. (1991), where the UOE process was simulated using an analytical formulation that describes the kinematics of the fabrication process. This work demonstrated the significant impact of the geometric and material imperfections due to the cold forming process on the collapse pressure of the pipe in deep water applications. Similar conclusions were also reached in other works that focus on the manufacturing process of UOE (Herynk et al., 2007; Toscano et al., 2007; Chatzopoulou et al., 2016) and JCO-E pipes (Antoniou et al., 2019). 1. Introduction 1. Introduction

∗ Corresponding author. E-mail address: ilgavrii@uth.gr ∗ Corresponding author. E-mail address: ilgavrii@uth.gr

2452-3216 © 2024 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 scientific committee of IWPDF 2023 Chairman 10.1016/j.prostr.2024.06.040 2210-7843 © 2024 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 scientific committee of IWPDF 2023. 2210-7843 © 2024 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 scientific committee of IWPDF 2023.