Mechanical responses of metallic strip flexible pipes subjected to pure torsion |
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| Institution: | 1. Civil Engineering Department, Federal University of Rio de Janeiro, COPPE/UFRJ, 21945-970, Rio de Janeiro, RJ, Brazil;2. Petrobras Research and Development Center – CENPES, 21949-900, Cidade Universitária, Quadra 7, Ilha Do Fundão, Rio de Janeiro, RJ, Brazil |
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| Abstract: | Metallic strip flexible pipes (MSFP), a relatively new style of unbonded flexible pipes, are considered as an attractive alternative to traditional submarine pipes. Pipelines will inevitably confront torsion load which may affect the integrity and safety during their installation and application. Throughout this paper, the mechanical behavior of MSFP subjected to pure torsion is investigated by both experimental and numerical methods. Results from these two methods are essentially in agreement with each other. The finite element method (FEM) can be adopted to predict the failure torque of MSFP under torsion and analyze the detailed stress conditions of each layer. In addition, the effects of boundary conditions, layout manners of steel strips, friction coefficients between contact surfaces, twist directions and tension loads are discussed. The obtained conclusions will benefit cross-section design of MSFP and relative practical engineering. |
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| Keywords: | Metallic strip flexible pipes Torsion Experiment Finite element method |
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