Bitumen is used as anticorrosion material to protect armor wires in subsea cables and umbilicals. Establishing bitumen’s viscoelastic properties is essential for developing analytical models of how bitumen influences the cable’s mechanical properties, in particular the bending stiffness. A new laboratory instrument has been developed for establishing the viscoelastic properties of bitumen subject to equally large strains as in real-life cables. This paper presents the basic principle of the new instrument and derives how to calculate bitumen’s viscoelastic properties from the measurements logged by the instrument. The paper also models bitumen’s viscoelastic properties as function of strain amplitude, strain frequency, and bitumen temperature, using multi-variable data analysis. These models show that the viscoelastic properties are highly temperature dependent. Bitumen’s shear stress / shear strain amplitude ratio grows with increasing rate as the temperature decreases.
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ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering
May 31–June 5, 2015
St. John’s, Newfoundland, Canada
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-5651-2
PROCEEDINGS PAPER
Viscoelastic Large Strain Model of Bitumen Used for Corrosion Protection in Subsea Cables and Umbilicals
Magnus Komperød,
Magnus Komperød
Nexans Norway AS, Halden, Norway
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Bjørn Konradsen,
Bjørn Konradsen
Nexans Norway AS, Halden, Norway
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Roger Slora
Roger Slora
Nexans Norway AS, Halden, Norway
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Magnus Komperød
Nexans Norway AS, Halden, Norway
Bjørn Konradsen
Nexans Norway AS, Halden, Norway
Roger Slora
Nexans Norway AS, Halden, Norway
Paper No:
OMAE2015-41135, V05AT04A028; 10 pages
Published Online:
October 21, 2015
Citation
Komperød, M, Konradsen, B, & Slora, R. "Viscoelastic Large Strain Model of Bitumen Used for Corrosion Protection in Subsea Cables and Umbilicals." Proceedings of the ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. Volume 5A: Pipeline and Riser Technology. St. John’s, Newfoundland, Canada. May 31–June 5, 2015. V05AT04A028. ASME. https://doi.org/10.1115/OMAE2015-41135
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