Mechanical Behavior of Cross-Winding Steel-Wire–Reinforced Thermoplastics Pipe under Internal Pressure
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 14, Issue 2
Abstract
Cross-winding steel-wire–reinforced thermoplastic pipes (CSWRTPs) have been widely applied in oilfield gathering environments in China because of their excellent physical properties. In this study, the failure mode, short-term burst pressure, and strain for a CSWRTP with an external diameter of 75 mm and a wall thickness of 10 mm under internal pressure are investigated through experimental measurements conducted with a burst test system and simulations completed with ANSYS software. A new three-dimensional finite-element burst failure model of CSWRTPs is proposed. Simulation results are in good agreement with the measurements. An axial ductile crack was found on the tested pipe with an uneven circumferential expansion deformation. The simulated short-term burst pressure is in a good agreement with the measured value (19.7 MPa) with an error of . The growth of the strain is initially zero, followed by a linear growth, rapid growth, and a clifflike drop when the crack is generated. The effective plastic strain within the inner polyethylene liner is greater than that within the outer polyethylene sheath, and the effective stress within the inner steel wire is greater than that within the outer steel wire. The ultimate pressure–bearing capacity decreases linearly as the strength of the steel wire decreases. Therefore, reduction of the ultimate pressure–bearing capacity of CSWRTP results from the decrease of steel wire strength from corrosion when applied in oilfield gathering systems. This finite-element analysis method can provide a reference to optimize the structural design of CSWRTP.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors wish to thank Natural Science Foundation of Sichuan Province (Grant No. 2023NSFSC0421), Fundamental Research Funds for the Central Universities (Grant No. 19CX05007A), National Natural Science Foundation of China (Grant Nos. 51606160 and 51779212), and National Science and Technology Major Project of China (Grant No. 2016ZX05025004-005).
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Information & Authors
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Published In
Journal of Pipeline Systems Engineering and Practice
Volume 14 • Issue 2 • May 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: May 19, 2022
Accepted: Jan 25, 2023
Published online: Mar 10, 2023
Published in print: May 1, 2023
Discussion open until: Aug 10, 2023
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