Experimental and Numerical Study of the Elastic SCF of Tubular Joints
This paper provides data on stress concentration factors (SCFs) from experimental measurements on cruciform tubular joints of a chord and brace intersection under axial loading. High-fidelity finite element models were generated and validated against these measurements. Further, the statistical vari...
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| Format: | Article |
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MDPI AG
2021-07-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/14/15/4220 |
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| author | Mostafa Atteya Ove Mikkelsen John Wintle Gerhard Ersdal |
| author_facet | Mostafa Atteya Ove Mikkelsen John Wintle Gerhard Ersdal |
| author_sort | Mostafa Atteya |
| collection | DOAJ |
| description | This paper provides data on stress concentration factors (SCFs) from experimental measurements on cruciform tubular joints of a chord and brace intersection under axial loading. High-fidelity finite element models were generated and validated against these measurements. Further, the statistical variation and the uncertainty in both experiments and finite element analysis (FEA) are studied, including the effect of finite element modelling of the weld profile, mesh size, element type and the method for deriving the SCF. A method is proposed for modelling such uncertainties in order to determine a reasonable SCF. Traditionally, SCF are determined by parametric formulae found in codes and standards and the paper also provides these for comparison. Results from the FEA generally show that the SCF increases with a finer mesh, 2nd order brick elements, linear extrapolation and a larger weld profile. Comparison between experimental SCFs indicates that a very fine mesh and the use of 2nd order elements is required to provide SCF on the safe side. It is further found that the parametric SCF equations in codes are reasonably on the safe side and a detailed finite element analysis could be beneficial if small gains in fatigue life need to be justified. |
| first_indexed | 2024-03-10T09:12:31Z |
| format | Article |
| id | doaj.art-e2067428fdba411283f05b797b33cefa |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T09:12:31Z |
| publishDate | 2021-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-e2067428fdba411283f05b797b33cefa2023-11-22T05:53:27ZengMDPI AGMaterials1996-19442021-07-011415422010.3390/ma14154220Experimental and Numerical Study of the Elastic SCF of Tubular JointsMostafa Atteya0Ove Mikkelsen1John Wintle2Gerhard Ersdal3Department of Mechanical and Structural Engineering and Materials Science, Faculty of Science and Technology, University of Stavanger, 4021 Stavanger, NorwayDepartment of Mechanical and Structural Engineering and Materials Science, Faculty of Science and Technology, University of Stavanger, 4021 Stavanger, NorwayDepartment of Mechanical Engineering, Faculty of Engineering, University of Strathclyde, Glasgow G1 1XQ, UKDepartment of Mechanical and Structural Engineering and Materials Science, Faculty of Science and Technology, University of Stavanger, 4021 Stavanger, NorwayThis paper provides data on stress concentration factors (SCFs) from experimental measurements on cruciform tubular joints of a chord and brace intersection under axial loading. High-fidelity finite element models were generated and validated against these measurements. Further, the statistical variation and the uncertainty in both experiments and finite element analysis (FEA) are studied, including the effect of finite element modelling of the weld profile, mesh size, element type and the method for deriving the SCF. A method is proposed for modelling such uncertainties in order to determine a reasonable SCF. Traditionally, SCF are determined by parametric formulae found in codes and standards and the paper also provides these for comparison. Results from the FEA generally show that the SCF increases with a finer mesh, 2nd order brick elements, linear extrapolation and a larger weld profile. Comparison between experimental SCFs indicates that a very fine mesh and the use of 2nd order elements is required to provide SCF on the safe side. It is further found that the parametric SCF equations in codes are reasonably on the safe side and a detailed finite element analysis could be beneficial if small gains in fatigue life need to be justified.https://www.mdpi.com/1996-1944/14/15/4220fatigueoffshore structuresexperimental testingtubular jointshot spot stress (HSS)stress concentration factors (SCF) |
| spellingShingle | Mostafa Atteya Ove Mikkelsen John Wintle Gerhard Ersdal Experimental and Numerical Study of the Elastic SCF of Tubular Joints Materials fatigue offshore structures experimental testing tubular joints hot spot stress (HSS) stress concentration factors (SCF) |
| title | Experimental and Numerical Study of the Elastic SCF of Tubular Joints |
| title_full | Experimental and Numerical Study of the Elastic SCF of Tubular Joints |
| title_fullStr | Experimental and Numerical Study of the Elastic SCF of Tubular Joints |
| title_full_unstemmed | Experimental and Numerical Study of the Elastic SCF of Tubular Joints |
| title_short | Experimental and Numerical Study of the Elastic SCF of Tubular Joints |
| title_sort | experimental and numerical study of the elastic scf of tubular joints |
| topic | fatigue offshore structures experimental testing tubular joints hot spot stress (HSS) stress concentration factors (SCF) |
| url | https://www.mdpi.com/1996-1944/14/15/4220 |
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