Numerical Study on Flexible Pipe End Fitting Progressive Failure Behavior Based on Cohesive Zone Model
Flexible pipes are extensively used to connect seabed and floating production systems for the development of deep-water oil and gas. In the top connection area, end fitting (EF) is the connector between the flexible pipe and floating platform, as a critical component for structural failure. To addre...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/11/1/116 |
| _version_ | 1827624380820094976 |
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| author | Tao Zhang Qingzhen Lu Jun Yan Shichao Wang Qianjin Yue Shanghua Wu Hailong Lu Jinlong Chen |
| author_facet | Tao Zhang Qingzhen Lu Jun Yan Shichao Wang Qianjin Yue Shanghua Wu Hailong Lu Jinlong Chen |
| author_sort | Tao Zhang |
| collection | DOAJ |
| description | Flexible pipes are extensively used to connect seabed and floating production systems for the development of deep-water oil and gas. In the top connection area, end fitting (EF) is the connector between the flexible pipe and floating platform, as a critical component for structural failure. To address this issue, a combined numerical and experimental prediction method is proposed in this paper to investigate the failure behavior of flexible pipes EF considering tensile armor and epoxy resin debonding. In order to analyze the stress distribution of the tensile armor and the damage state of the bonding interface as the tensile load increases, a finite element model of the EF anchorage system is established based on the cohesive zone model (CZM). Additionally, the effects of the epoxy resin shear strength (ss) and the steel wire yield strength (ys) on the structural load-bearing capacity are discussed in detail. The results indicate that wire strength and interface bonding have a substantial effect on the anchorage system’s failure behavior, and the low-strength wire anchorage system has a three-stage failure behavior with wire yielding as the predominant failure mode, while the high-strength wire anchorage system has a two-stage failure behavior with interface debonding as the predominant failure mode. |
| first_indexed | 2024-03-09T12:06:52Z |
| format | Article |
| id | doaj.art-9cab7073de0d4a13b8733677f61534fe |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-09T12:06:52Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-9cab7073de0d4a13b8733677f61534fe2023-11-30T22:57:25ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-01-0111111610.3390/jmse11010116Numerical Study on Flexible Pipe End Fitting Progressive Failure Behavior Based on Cohesive Zone ModelTao Zhang0Qingzhen Lu1Jun Yan2Shichao Wang3Qianjin Yue4Shanghua Wu5Hailong Lu6Jinlong Chen7State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, ChinaState Key Laboratory of Structural Analysis for Industrial Equipment, School of Ocean Science and Technology, Dalian University of Technology, Panjin 124221, ChinaState Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, ChinaState Key Laboratory of Structural Analysis for Industrial Equipment, School of Ocean Science and Technology, Dalian University of Technology, Panjin 124221, ChinaState Key Laboratory of Structural Analysis for Industrial Equipment, School of Ocean Science and Technology, Dalian University of Technology, Panjin 124221, ChinaState Key Laboratory of Structural Analysis for Industrial Equipment, School of Ocean Science and Technology, Dalian University of Technology, Panjin 124221, ChinaState Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Dalian University of Technology, Dalian 116024, ChinaJiangsu Hengtong Marine Cable Systems Co., Ltd., Changshu 215537, ChinaFlexible pipes are extensively used to connect seabed and floating production systems for the development of deep-water oil and gas. In the top connection area, end fitting (EF) is the connector between the flexible pipe and floating platform, as a critical component for structural failure. To address this issue, a combined numerical and experimental prediction method is proposed in this paper to investigate the failure behavior of flexible pipes EF considering tensile armor and epoxy resin debonding. In order to analyze the stress distribution of the tensile armor and the damage state of the bonding interface as the tensile load increases, a finite element model of the EF anchorage system is established based on the cohesive zone model (CZM). Additionally, the effects of the epoxy resin shear strength (ss) and the steel wire yield strength (ys) on the structural load-bearing capacity are discussed in detail. The results indicate that wire strength and interface bonding have a substantial effect on the anchorage system’s failure behavior, and the low-strength wire anchorage system has a three-stage failure behavior with wire yielding as the predominant failure mode, while the high-strength wire anchorage system has a two-stage failure behavior with interface debonding as the predominant failure mode.https://www.mdpi.com/2077-1312/11/1/116flexible pipeend fittingprogressive failurecohesive zone model |
| spellingShingle | Tao Zhang Qingzhen Lu Jun Yan Shichao Wang Qianjin Yue Shanghua Wu Hailong Lu Jinlong Chen Numerical Study on Flexible Pipe End Fitting Progressive Failure Behavior Based on Cohesive Zone Model Journal of Marine Science and Engineering flexible pipe end fitting progressive failure cohesive zone model |
| title | Numerical Study on Flexible Pipe End Fitting Progressive Failure Behavior Based on Cohesive Zone Model |
| title_full | Numerical Study on Flexible Pipe End Fitting Progressive Failure Behavior Based on Cohesive Zone Model |
| title_fullStr | Numerical Study on Flexible Pipe End Fitting Progressive Failure Behavior Based on Cohesive Zone Model |
| title_full_unstemmed | Numerical Study on Flexible Pipe End Fitting Progressive Failure Behavior Based on Cohesive Zone Model |
| title_short | Numerical Study on Flexible Pipe End Fitting Progressive Failure Behavior Based on Cohesive Zone Model |
| title_sort | numerical study on flexible pipe end fitting progressive failure behavior based on cohesive zone model |
| topic | flexible pipe end fitting progressive failure cohesive zone model |
| url | https://www.mdpi.com/2077-1312/11/1/116 |
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