Analysis of the mechanical properties of a fibreglass reinforced flexible pipe (FGRFP)

Journal article (2020)

Authors

Yifan Gao Zhejiang University
Yong Bai Zhejiang University
Peng Cheng Zhejiang University
P. Fang Transport Engineering and Logistics - Mechanical, Maritime and Materials Engineering
Yuxin Xu Zhejiang University
Research Group
Transport Engineering and Logistics (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2020 Yifan Gao, Yong Bai, Peng Cheng, P. Fang, Yuxin Xu
DOI
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https://doi.org/10.1080/17445302.2020.1857568
Bending Fiberglass reinforced flexible pipes Full-scale experiment Numerical simulation method Simplified theoretical method
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Published Date

2020

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Marine and Transport Technology

Research Group

Transport Engineering and Logistics

Abstract

Fibreglass reinforced flexible pipe (FGRFP) is a kind of composite thermoplastic pipe serving as a preferred application in the field of oil transportation. This paper studies the mechanical behaviour of FGRFPs under pure bending by experimental, numerical and theoretical methods. Full-scale four-point bending tests are conducted and the curvature-bending moment relations of specimens are recorded. In the numerical simulation method (NSM), a detailed finite element model considering both material and geometric nonlinear behaviour is established, and the composite is defined as an orthotropic elastic-plastic material. Based on the Euler–Bernoulli beam theory, a simplified theoretical method (STM) is proposed to predict the ultimate bending moment. In the parametric study, a simple formula is introduced to modify STM to make it more accurate. Good agreements proves the reasonability of the proposed NSM and STM. Additionally, STM could make a contribution to engineers in terms of a concise and relatively accurate way in ultimate status analysis.