Numerical Analysis of Mechanical Behaviors of Composite Tensile Armored Flexible Risers in Deep-Sea Oil and Gas
As oil and natural gas production continue to go deeper into the ocean, the flexible riser, as a connection to the surface of the marine oil and gas channel, will confront greater problems in its practical application. Composite materials are being considered to replace steel in the unbonded flexibl...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-03-01
|
| Series: | Journal of Marine Science and Engineering |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-1312/11/3/619 |
| _version_ | 1797610876355739648 |
|---|---|
| author | Hu Liu Meng Li Yijun Shen |
| author_facet | Hu Liu Meng Li Yijun Shen |
| author_sort | Hu Liu |
| collection | DOAJ |
| description | As oil and natural gas production continue to go deeper into the ocean, the flexible riser, as a connection to the surface of the marine oil and gas channel, will confront greater problems in its practical application. Composite materials are being considered to replace steel in the unbonded flexible pipe in order to successfully meet the lightweight and high-strength criteria of ultra-deep-water oil and gas production. The carbon-fiber-reinforced material substitutes the steel of the tensile armor layer with a greater strength-to-weight ratio. However, its performance in deep-water environments is less researched. To investigate the mechanical response of a carbon fiber composite flexible riser in the deep sea, this study establishes the ABAQUS quasi-static analysis model to predict the performance of the pipe. Considering the special constitutive relations of composite materials, the tensile stiffness of steel pipe and carbon fiber-reinforced composite flexible pipe are predicted. The results show that the replacement of steel strips with carbon fiber can provide 85.06% tensile stiffness while reducing the weight by 77.7%. Moreover, carbon-fiber-reinforced strips have a lower radial modulus, which may not be sufficient to cause buckling under axial compression, so the instability of the carbon fiber composite armor layer under axial compression is further studied in this paper; furthermore, the characteristics of axial stiffness are analyzed, and the effects of the friction coefficient and hydrostatic pressure are discussed. |
| first_indexed | 2024-03-11T06:20:03Z |
| format | Article |
| id | doaj.art-5b081dd7d9914380a289f93dd4ad649b |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-11T06:20:03Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-5b081dd7d9914380a289f93dd4ad649b2023-11-17T11:58:09ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-03-0111361910.3390/jmse11030619Numerical Analysis of Mechanical Behaviors of Composite Tensile Armored Flexible Risers in Deep-Sea Oil and GasHu Liu0Meng Li1Yijun Shen2School of Civil and Architectural Engineering, Hainan University, Haikou 570228, ChinaState Key Laboratory of Marine Resources Utilization in South China Sea, Hainan University, Haikou 570228, ChinaState Key Laboratory of Marine Resources Utilization in South China Sea, Hainan University, Haikou 570228, ChinaAs oil and natural gas production continue to go deeper into the ocean, the flexible riser, as a connection to the surface of the marine oil and gas channel, will confront greater problems in its practical application. Composite materials are being considered to replace steel in the unbonded flexible pipe in order to successfully meet the lightweight and high-strength criteria of ultra-deep-water oil and gas production. The carbon-fiber-reinforced material substitutes the steel of the tensile armor layer with a greater strength-to-weight ratio. However, its performance in deep-water environments is less researched. To investigate the mechanical response of a carbon fiber composite flexible riser in the deep sea, this study establishes the ABAQUS quasi-static analysis model to predict the performance of the pipe. Considering the special constitutive relations of composite materials, the tensile stiffness of steel pipe and carbon fiber-reinforced composite flexible pipe are predicted. The results show that the replacement of steel strips with carbon fiber can provide 85.06% tensile stiffness while reducing the weight by 77.7%. Moreover, carbon-fiber-reinforced strips have a lower radial modulus, which may not be sufficient to cause buckling under axial compression, so the instability of the carbon fiber composite armor layer under axial compression is further studied in this paper; furthermore, the characteristics of axial stiffness are analyzed, and the effects of the friction coefficient and hydrostatic pressure are discussed.https://www.mdpi.com/2077-1312/11/3/619flexible risernumerical analysiscarbon fiberultimate tensile strengthinstabilitybuckling |
| spellingShingle | Hu Liu Meng Li Yijun Shen Numerical Analysis of Mechanical Behaviors of Composite Tensile Armored Flexible Risers in Deep-Sea Oil and Gas Journal of Marine Science and Engineering flexible riser numerical analysis carbon fiber ultimate tensile strength instability buckling |
| title | Numerical Analysis of Mechanical Behaviors of Composite Tensile Armored Flexible Risers in Deep-Sea Oil and Gas |
| title_full | Numerical Analysis of Mechanical Behaviors of Composite Tensile Armored Flexible Risers in Deep-Sea Oil and Gas |
| title_fullStr | Numerical Analysis of Mechanical Behaviors of Composite Tensile Armored Flexible Risers in Deep-Sea Oil and Gas |
| title_full_unstemmed | Numerical Analysis of Mechanical Behaviors of Composite Tensile Armored Flexible Risers in Deep-Sea Oil and Gas |
| title_short | Numerical Analysis of Mechanical Behaviors of Composite Tensile Armored Flexible Risers in Deep-Sea Oil and Gas |
| title_sort | numerical analysis of mechanical behaviors of composite tensile armored flexible risers in deep sea oil and gas |
| topic | flexible riser numerical analysis carbon fiber ultimate tensile strength instability buckling |
| url | https://www.mdpi.com/2077-1312/11/3/619 |
| work_keys_str_mv | AT huliu numericalanalysisofmechanicalbehaviorsofcompositetensilearmoredflexiblerisersindeepseaoilandgas AT mengli numericalanalysisofmechanicalbehaviorsofcompositetensilearmoredflexiblerisersindeepseaoilandgas AT yijunshen numericalanalysisofmechanicalbehaviorsofcompositetensilearmoredflexiblerisersindeepseaoilandgas |