The failure mechanism of the composite flexible riser, comprising a pipe with melt fused carbon fiber tape or pultruded composite rods, is not well understood. As there is change in the configuration of the composite layers and its manufacturing methods, so the bulk material property also changes significantly. To capture the correct material model for global FE analysis, real time x-ray computed tomography was performed while the flexible pipe was being compressed. For developing a constitutive model for the composites, a time series of 3D volume images were analyzed quantifying the local strains responsible for the debonding of the layers and the crack development. These values were then used to understand the inter-layer adhesion leading to correlation between the FE global modelling and experiments capable of capturing the progressive delamination. The resulting global modelling was used to determine the area under compressive loading. The effect of global sea conditions and cumulative damage was noted. A correlation between the global model and experiments can be used to optimize riser performance. This method hopes to capture the overall behavior of flexible pipe under compressive loading.
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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
In Situ and Real Time X-Ray Computed Tomography for the Micromechanics Based Constitutive Modelling of the Unbonded Flexible Riser
Ketan Pancholi,
Ketan Pancholi
Aquaterra Energy Limited, Norwich, UK
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Vineet Jha,
Vineet Jha
GE Oil and Gas UK, Newcastle upon Tyne, UK
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Neville Dodds,
Neville Dodds
GE Oil and Gas UK, Newcastle upon Tyne, UK
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Dehong Huo,
Dehong Huo
Newcastle University, Newcastle upon Tyne, UK
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James Latto
James Latto
GE Oil and Gas UK, Newcastle upon Tyne, UK
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Ketan Pancholi
Aquaterra Energy Limited, Norwich, UK
Vineet Jha
GE Oil and Gas UK, Newcastle upon Tyne, UK
Neville Dodds
GE Oil and Gas UK, Newcastle upon Tyne, UK
Dehong Huo
Newcastle University, Newcastle upon Tyne, UK
James Latto
GE Oil and Gas UK, Newcastle upon Tyne, UK
Paper No:
OMAE2015-41817, V05AT04A050; 10 pages
Published Online:
October 21, 2015
Citation
Pancholi, K, Jha, V, Dodds, N, Huo, D, & Latto, J. "In Situ and Real Time X-Ray Computed Tomography for the Micromechanics Based Constitutive Modelling of the Unbonded Flexible Riser." 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. V05AT04A050. ASME. https://doi.org/10.1115/OMAE2015-41817
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