Safety assessment of cracked tubular Y-joints using failure assessment diagram (FAD) method
This report covers the Failure Assessment Diagram (FAD) analysis of cracked circular hollow section (CHS) Y-joints according to British Standard BS 7910 FAD level 3C assessment criteria.Firstly, 3D mesh models of the CHS Y-joins ware generated with a surface crack of specific depth and length. Ax...
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| Format: | Final Year Project (FYP) |
| Language: | English |
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2013
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| Online Access: | http://hdl.handle.net/10356/52816 |
| _version_ | 1811682874845298688 |
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| author | Gao, Zhe. |
| author2 | Lie Seng Tjhen |
| author_facet | Lie Seng Tjhen Gao, Zhe. |
| author_sort | Gao, Zhe. |
| collection | NTU |
| description | This report covers the Failure Assessment Diagram (FAD) analysis of cracked circular hollow section (CHS) Y-joints according to British Standard BS 7910 FAD level 3C assessment criteria.Firstly, 3D mesh models of the CHS Y-joins ware generated with a surface crack of specific
depth and length. Axial tension loading and in-plan bending moment were applied to the brace end of the models and the relationship between the load and the displacement was obtained in the form of load displacement curve. Secondly, Plastic collapse loading (Pc) was then obtained by using two-elastic criteria to locate the intersection on the load displacement curve, and J-integrals of elastic and elastic-plastic were calculated using VCCT technique by ABAQUS software. Finally, FAD curves of all analyzed cracked Y-joints were constructed. It was found that the new mesh generating approach is effective and yield relative accurate results, and some parts of the constructed FAD curves fell inside the standard Level 2A FAD curve for some cracked RHS joints, which means that the evaluation results using standard Level 2A FAD curve might be unsafe. |
| first_indexed | 2024-10-01T04:03:47Z |
| format | Final Year Project (FYP) |
| id | ntu-10356/52816 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:03:47Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/528162023-03-03T17:23:31Z Safety assessment of cracked tubular Y-joints using failure assessment diagram (FAD) method Gao, Zhe. Lie Seng Tjhen School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Structures and design This report covers the Failure Assessment Diagram (FAD) analysis of cracked circular hollow section (CHS) Y-joints according to British Standard BS 7910 FAD level 3C assessment criteria.Firstly, 3D mesh models of the CHS Y-joins ware generated with a surface crack of specific depth and length. Axial tension loading and in-plan bending moment were applied to the brace end of the models and the relationship between the load and the displacement was obtained in the form of load displacement curve. Secondly, Plastic collapse loading (Pc) was then obtained by using two-elastic criteria to locate the intersection on the load displacement curve, and J-integrals of elastic and elastic-plastic were calculated using VCCT technique by ABAQUS software. Finally, FAD curves of all analyzed cracked Y-joints were constructed. It was found that the new mesh generating approach is effective and yield relative accurate results, and some parts of the constructed FAD curves fell inside the standard Level 2A FAD curve for some cracked RHS joints, which means that the evaluation results using standard Level 2A FAD curve might be unsafe. Bachelor of Engineering 2013-05-27T08:29:14Z 2013-05-27T08:29:14Z 2013 2013 Final Year Project (FYP) http://hdl.handle.net/10356/52816 en Nanyang Technological University 121 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Civil engineering::Structures and design Gao, Zhe. Safety assessment of cracked tubular Y-joints using failure assessment diagram (FAD) method |
| title | Safety assessment of cracked tubular Y-joints using failure assessment diagram (FAD) method |
| title_full | Safety assessment of cracked tubular Y-joints using failure assessment diagram (FAD) method |
| title_fullStr | Safety assessment of cracked tubular Y-joints using failure assessment diagram (FAD) method |
| title_full_unstemmed | Safety assessment of cracked tubular Y-joints using failure assessment diagram (FAD) method |
| title_short | Safety assessment of cracked tubular Y-joints using failure assessment diagram (FAD) method |
| title_sort | safety assessment of cracked tubular y joints using failure assessment diagram fad method |
| topic | DRNTU::Engineering::Civil engineering::Structures and design |
| url | http://hdl.handle.net/10356/52816 |
| work_keys_str_mv | AT gaozhe safetyassessmentofcrackedtubularyjointsusingfailureassessmentdiagramfadmethod |