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research-article

NUMERICAL SIMULATION OF JCO-E PIPE MANUFACTURING PROCESS AND ITS EFFECT ON THE EXTERNAL PRESSURE CAPACITY OF THE PIPE

[+] Author and Article Information
Konstantinos Antoniou

Department of Mechanical Engineering, University of Thessaly, Volos, Greece
konsanto@uth.gr

Giannoula Chatzopoulou

Department of Mechanical Engineering, University of Thessaly, Volos, Greece
gihatzop@uth.gr

Spyros A. Karamanos

Department of Mechanical Engineering, University of Thessaly, Volos, Greece; School of Engineering, The University of Edinburgh, Scotland, UK
skara@mie.uth.gr

Athanasios Tazedakis

Corinth Pipeworks S. A., Thisvi, Greece
atazedakis@cpw.vionet.gr

Christos Palagas

Corinth Pipeworks S. A., Thisvi, Greece
cpalagas@cpw.vionet.gr

Efthymios Dourdounis

Corinth Pipeworks S. A., Thisvi, Greece
edourdounis@cpw.vionet.gr

1Corresponding author.

ASME doi:10.1115/1.4040801 History: Received January 17, 2018; Revised July 05, 2018

Abstract

Large-diameter thick-walled steel pipes during their installation in deep-water are subjected to external pressure, which may trigger structural instability due to pipe ovalization, with detrimental effects. The resistance of offshore pipes against this instability is affected by local geometric deviations and residual stresses, introduced by the line pipe manufacturing process. In the present paper, the JCO-E pipe manufacturing process, a commonly adopted process for producing large-diameter pipes of significant thickness, is examined. The study examines the effect of JCO-E line pipe manufacturing process on the external pressure resistance of offshore pipes, candidates for deepwater applications using nonlinear finite element simulation tools. The cold bending induced by the JCO forming process as well as the subsequent welding and expansion (E) operations are simulated rigorously. Subsequently, the application of external pressure is modeled until structural instability (collapse) is detected. Both the JCO-E manufacturing process and the external pressure response of the pipe, are modelled using a two-dimensional generalized plane strain model, together with a coupled thermo-mechanical model for simulating the welding process.

Copyright (c) 2018 by ASME
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