Failure Assessment Diagram (FAD) analysis of fatigue test results for X65 welded joints
Offshore pipelines transfer oil and gas from seabed to production facility on the surface. The long pipelines are formed by welding of pipe segments, where these welded joints are a source of stress concentration and defects from which fatigue cracks can grow. This work aims to study the behaviour o...
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sg-ntu-dr.10356-882662023-03-04T17:16:30Z Failure Assessment Diagram (FAD) analysis of fatigue test results for X65 welded joints Hoh, Hsin Jen Pang, John Hock Lye Tsang, Kin Shun Hénaff, G. School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering Failure Assessment Diagram Fatigue Crack Propagation Offshore pipelines transfer oil and gas from seabed to production facility on the surface. The long pipelines are formed by welding of pipe segments, where these welded joints are a source of stress concentration and defects from which fatigue cracks can grow. This work aims to study the behaviour of deep fatigue cracks. In this current work, finite-element based on a parametric study of four-point bending is used to assess the stress intensity factors (SIFs) of deep surface cracks in X65 specimens, while considering local limit load the remaining load bearing ligament. These deep cracks take on a non-regular shape and have widths that exceed that of the specimen. They will be compared to empirical expressions from derived standards such as British Standards BS7910, which may be more conservative. The existing large flaw is also assessed via the failure assessment diagram (FAD). The effects of limit load solutions and reference stresses used to determine the FAD diagram will be discussed. Published version 2018-08-27T05:45:12Z 2019-12-06T16:59:27Z 2018-08-27T05:45:12Z 2019-12-06T16:59:27Z 2018 Journal Article Hoh, H. J., Pang, J. H. L., & Tsang, K. S. (2018). Failure Assessment Diagram (FAD) analysis of fatigue test results for X65 welded joints. MATEC Web of Conferences, 165, 21011-. doi:10.1051/matecconf/201816521011 https://hdl.handle.net/10356/88266 http://hdl.handle.net/10220/45680 10.1051/matecconf/201816521011 en MATEC Web of Conferences © 2018 The Author(s) (MATEC Web of Conferences) (Published by EDP Sciences). This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (http://creativecommons.org/licenses/by/4.0/). 6 p. application/pdf |
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DRNTU::Engineering::Mechanical engineering Failure Assessment Diagram Fatigue Crack Propagation Hoh, Hsin Jen Pang, John Hock Lye Tsang, Kin Shun Failure Assessment Diagram (FAD) analysis of fatigue test results for X65 welded joints |
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Offshore pipelines transfer oil and gas from seabed to production facility on the surface. The long pipelines are formed by welding of pipe segments, where these welded joints are a source of stress concentration and defects from which fatigue cracks can grow. This work aims to study the behaviour of deep fatigue cracks. In this current work, finite-element based on a parametric study of four-point bending is used to assess the stress intensity factors (SIFs) of deep surface cracks in X65 specimens, while considering local limit load the remaining load bearing ligament. These deep cracks take on a non-regular shape and have widths that exceed that of the specimen. They will be compared to empirical expressions from derived standards such as British Standards BS7910, which may be more conservative. The existing large flaw is also assessed via the failure assessment diagram (FAD). The effects of limit load solutions and reference stresses used to determine the FAD diagram will be discussed. |
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Hénaff, G. |
author_facet |
Hénaff, G. Hoh, Hsin Jen Pang, John Hock Lye Tsang, Kin Shun |
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Article |
author |
Hoh, Hsin Jen Pang, John Hock Lye Tsang, Kin Shun |
author_sort |
Hoh, Hsin Jen |
title |
Failure Assessment Diagram (FAD) analysis of fatigue test results for X65 welded joints |
title_short |
Failure Assessment Diagram (FAD) analysis of fatigue test results for X65 welded joints |
title_full |
Failure Assessment Diagram (FAD) analysis of fatigue test results for X65 welded joints |
title_fullStr |
Failure Assessment Diagram (FAD) analysis of fatigue test results for X65 welded joints |
title_full_unstemmed |
Failure Assessment Diagram (FAD) analysis of fatigue test results for X65 welded joints |
title_sort |
failure assessment diagram (fad) analysis of fatigue test results for x65 welded joints |
publishDate |
2018 |
url |
https://hdl.handle.net/10356/88266 http://hdl.handle.net/10220/45680 |
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1759853132398985216 |