Fatigue analysis on crack problems in engineering structures with stress concentration

Offshore Pipelines are used to transport crude oil and gas from offshore oil rigs to coastal oil refineries. These pipes are often located at the seabed and can lie in seawater depths ranging from 50 meters to several thousand meters. As such, these pipes are under enormous pressure from the crushin...

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Main Author: James, Joshua Peter
Other Authors: Xiao Zhongmin
Format: Final Year Project
Language:English
Published: Nanyang Technological University 2023
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Online Access:https://hdl.handle.net/10356/172774
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Institution: Nanyang Technological University
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spelling sg-ntu-dr.10356-1727742023-12-23T16:50:26Z Fatigue analysis on crack problems in engineering structures with stress concentration James, Joshua Peter Xiao Zhongmin School of Mechanical and Aerospace Engineering MZXIAO@ntu.edu.sg Engineering::Mechanical engineering::Mechanics and dynamics Offshore Pipelines are used to transport crude oil and gas from offshore oil rigs to coastal oil refineries. These pipes are often located at the seabed and can lie in seawater depths ranging from 50 meters to several thousand meters. As such, these pipes are under enormous pressure from the crushing depths, as every 10m travelled below sea level incurs an increase in pressure of approximately 1 bar. Besides this, offshore pipes are often hundreds of kilometers in length, and is pre-welded in sections before being laid on the seabed. Welding often results in hydrogen diffusion and the cracking that results from it. These cracking comes in many forms such as porosity and cracking often propagates as the pipes are subject to the high dynamic forces acting on it. (Prashant Vashishtha, 2022) The objective of this project is to conduct simulation of force and fatigue analysis on crack problems in offshore pipes that are subjected to concentrated stresses resulting from existing conditions, with emphasis placed on the welded joints and supportive forces holding them in place. Computer simulation via ANSYS Finite Element Software. The focus is to study the impact of the location of a deformity on the build-up of stresses as well as the impact of a welded joint with deformities present. Bachelor of Engineering (Mechanical Engineering) 2023-12-20T11:23:49Z 2023-12-20T11:23:49Z 2023 Final Year Project (FYP) James, J. P. (2023). Fatigue analysis on crack problems in engineering structures with stress concentration. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/172774 https://hdl.handle.net/10356/172774 en B036 application/pdf Nanyang Technological University
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Mechanical engineering::Mechanics and dynamics
spellingShingle Engineering::Mechanical engineering::Mechanics and dynamics
James, Joshua Peter
Fatigue analysis on crack problems in engineering structures with stress concentration
description Offshore Pipelines are used to transport crude oil and gas from offshore oil rigs to coastal oil refineries. These pipes are often located at the seabed and can lie in seawater depths ranging from 50 meters to several thousand meters. As such, these pipes are under enormous pressure from the crushing depths, as every 10m travelled below sea level incurs an increase in pressure of approximately 1 bar. Besides this, offshore pipes are often hundreds of kilometers in length, and is pre-welded in sections before being laid on the seabed. Welding often results in hydrogen diffusion and the cracking that results from it. These cracking comes in many forms such as porosity and cracking often propagates as the pipes are subject to the high dynamic forces acting on it. (Prashant Vashishtha, 2022) The objective of this project is to conduct simulation of force and fatigue analysis on crack problems in offshore pipes that are subjected to concentrated stresses resulting from existing conditions, with emphasis placed on the welded joints and supportive forces holding them in place. Computer simulation via ANSYS Finite Element Software. The focus is to study the impact of the location of a deformity on the build-up of stresses as well as the impact of a welded joint with deformities present.
author2 Xiao Zhongmin
author_facet Xiao Zhongmin
James, Joshua Peter
format Final Year Project
author James, Joshua Peter
author_sort James, Joshua Peter
title Fatigue analysis on crack problems in engineering structures with stress concentration
title_short Fatigue analysis on crack problems in engineering structures with stress concentration
title_full Fatigue analysis on crack problems in engineering structures with stress concentration
title_fullStr Fatigue analysis on crack problems in engineering structures with stress concentration
title_full_unstemmed Fatigue analysis on crack problems in engineering structures with stress concentration
title_sort fatigue analysis on crack problems in engineering structures with stress concentration
publisher Nanyang Technological University
publishDate 2023
url https://hdl.handle.net/10356/172774
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