Stress analysis for an offshore pipeline containing an embedded crack
Over the years, offshore pipelines played an important role in transporting oil and gas used for energy consumption. Carbon steels are one of the most common materials used to build an economical offshore pipeline. As offshore pipelines can go up to hundreds of kilometers, these pipelines are constr...
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| Other Authors: | |
| Format: | Final Year Project (FYP) |
| Language: | English |
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Nanyang Technological University
2021
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| Online Access: | https://hdl.handle.net/10356/150198 |
| _version_ | 1826122587124531200 |
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| author | Lim, Cheng Yang |
| author2 | Xiao Zhongmin |
| author_facet | Xiao Zhongmin Lim, Cheng Yang |
| author_sort | Lim, Cheng Yang |
| collection | NTU |
| description | Over the years, offshore pipelines played an important role in transporting oil and gas used for energy consumption. Carbon steels are one of the most common materials used to build an economical offshore pipeline. As offshore pipelines can go up to hundreds of kilometers, these pipelines are constructed by joining multiple shorter pipes through a welding process. In this process, defects such as cracks and porosity are unavoidable due to environmental effects and bending stresses. Such defects may shorten the lifespan of pipes and lead to failure of pipes due to fracture. In some cases, a crack may propagate faster due to the interaction with near-by cracks and start to coalesce with those cracks. This phenomenon that increases the rate of fatigue crack growth is crucial in failure analysis and prevention for offshore pipelines, as it can significantly shorten the lifespan of the pipes. The objective of this report is to understand how the interaction of two embedded cracks affect the lifespan of a carbon steel offshore pipe. Computational simulations have been carried out with a Finite Element Software, ANSYS Workbench 19.2. The focus is to study the influence of the distance between the two cracks on the fatigue life span of the pipe. |
| first_indexed | 2024-10-01T05:50:55Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/150198 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:50:55Z |
| publishDate | 2021 |
| publisher | Nanyang Technological University |
| record_format | dspace |
| spelling | ntu-10356/1501982021-05-25T05:57:32Z Stress analysis for an offshore pipeline containing an embedded crack Lim, Cheng Yang Xiao Zhongmin School of Mechanical and Aerospace Engineering MZXIAO@ntu.edu.sg Engineering::Mechanical engineering Over the years, offshore pipelines played an important role in transporting oil and gas used for energy consumption. Carbon steels are one of the most common materials used to build an economical offshore pipeline. As offshore pipelines can go up to hundreds of kilometers, these pipelines are constructed by joining multiple shorter pipes through a welding process. In this process, defects such as cracks and porosity are unavoidable due to environmental effects and bending stresses. Such defects may shorten the lifespan of pipes and lead to failure of pipes due to fracture. In some cases, a crack may propagate faster due to the interaction with near-by cracks and start to coalesce with those cracks. This phenomenon that increases the rate of fatigue crack growth is crucial in failure analysis and prevention for offshore pipelines, as it can significantly shorten the lifespan of the pipes. The objective of this report is to understand how the interaction of two embedded cracks affect the lifespan of a carbon steel offshore pipe. Computational simulations have been carried out with a Finite Element Software, ANSYS Workbench 19.2. The focus is to study the influence of the distance between the two cracks on the fatigue life span of the pipe. Bachelor of Engineering (Mechanical Engineering) 2021-05-25T05:57:31Z 2021-05-25T05:57:31Z 2021 Final Year Project (FYP) Lim, C. Y. (2021). Stress analysis for an offshore pipeline containing an embedded crack. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/150198 https://hdl.handle.net/10356/150198 en B081 application/pdf Nanyang Technological University |
| spellingShingle | Engineering::Mechanical engineering Lim, Cheng Yang Stress analysis for an offshore pipeline containing an embedded crack |
| title | Stress analysis for an offshore pipeline containing an embedded crack |
| title_full | Stress analysis for an offshore pipeline containing an embedded crack |
| title_fullStr | Stress analysis for an offshore pipeline containing an embedded crack |
| title_full_unstemmed | Stress analysis for an offshore pipeline containing an embedded crack |
| title_short | Stress analysis for an offshore pipeline containing an embedded crack |
| title_sort | stress analysis for an offshore pipeline containing an embedded crack |
| topic | Engineering::Mechanical engineering |
| url | https://hdl.handle.net/10356/150198 |
| work_keys_str_mv | AT limchengyang stressanalysisforanoffshorepipelinecontaininganembeddedcrack |