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The effect of bend radius on the impulse transfer characteristics of V-hulls
This work is based primarily on the effects of V-tip bend radii on the impulse transfer to V-plates subjected to localised blast loading. Three rigid V-plates with V-angles of 60°, 90° and 120° were designed and fabricated from steel plates. Blast tests with PE4 charges ranging from 19 g to 58 g at...
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| Format: | Thesis |
| Language: | English |
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Department of Mechanical Engineering
2016
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| _version_ | 1867613200306929664 |
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| access_status_str | Open Access |
| author | Shekhar, Vinay Ramaswami |
| author2 | Langdon, Genevieve |
| author_browse | Langdon, Genevieve Shekhar, Vinay Ramaswami |
| author_facet | Langdon, Genevieve Shekhar, Vinay Ramaswami |
| author_sort | Shekhar, Vinay Ramaswami |
| collection | Thesis |
| description | This work is based primarily on the effects of V-tip bend radii on the impulse transfer to V-plates subjected to localised blast loading. Three rigid V-plates with V-angles of 60°, 90° and 120° were designed and fabricated from steel plates. Blast tests with PE4 charges ranging from 19 g to 58 g at a stand-off distance (SOD) of 34mm were performed. The geometric scaling was based on the dimensions of the TM-57 landmine and the Casspir APC MK II. In the numerical model, the optimum element length for the air mesh was obtained by performing a mesh convergence study on the Arbitrary Lagrangian-Eulerian (ALE) mesh, and validated using the impulse values measured from a 58 g detonation onto a 120° V-plate as it resulted in the highest impulse. Element lengths of 1.5, 2.0 and 3.0mm were investigated. Element lengths of 1.5 and 2.0mm both produced accurate results, though the run-time for an element length of 2.0mm was significantly lower. A validation study compared the numerically predicted impulses with those of the experiments and the results were found to be within an acceptable percentage variation. Hence a 2.0mm element length was chosen for the Arbitrary Lagrangian-Eulerian mesh. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/20126 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:21.936Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Mechanical Engineering |
| publisherStr | Department of Mechanical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/20126 The effect of bend radius on the impulse transfer characteristics of V-hulls Shekhar, Vinay Ramaswami Langdon, Genevieve Mechanical Engineering This work is based primarily on the effects of V-tip bend radii on the impulse transfer to V-plates subjected to localised blast loading. Three rigid V-plates with V-angles of 60°, 90° and 120° were designed and fabricated from steel plates. Blast tests with PE4 charges ranging from 19 g to 58 g at a stand-off distance (SOD) of 34mm were performed. The geometric scaling was based on the dimensions of the TM-57 landmine and the Casspir APC MK II. In the numerical model, the optimum element length for the air mesh was obtained by performing a mesh convergence study on the Arbitrary Lagrangian-Eulerian (ALE) mesh, and validated using the impulse values measured from a 58 g detonation onto a 120° V-plate as it resulted in the highest impulse. Element lengths of 1.5, 2.0 and 3.0mm were investigated. Element lengths of 1.5 and 2.0mm both produced accurate results, though the run-time for an element length of 2.0mm was significantly lower. A validation study compared the numerically predicted impulses with those of the experiments and the results were found to be within an acceptable percentage variation. Hence a 2.0mm element length was chosen for the Arbitrary Lagrangian-Eulerian mesh. 2016-06-24T06:32:37Z 2016-06-24T06:32:37Z 2015 Master Thesis Masters MSc (Eng) http://hdl.handle.net/11427/20126 eng application/pdf Department of Mechanical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Mechanical Engineering Shekhar, Vinay Ramaswami The effect of bend radius on the impulse transfer characteristics of V-hulls |
| thesis_degree_str | Master's |
| title | The effect of bend radius on the impulse transfer characteristics of V-hulls |
| title_full | The effect of bend radius on the impulse transfer characteristics of V-hulls |
| title_fullStr | The effect of bend radius on the impulse transfer characteristics of V-hulls |
| title_full_unstemmed | The effect of bend radius on the impulse transfer characteristics of V-hulls |
| title_short | The effect of bend radius on the impulse transfer characteristics of V-hulls |
| title_sort | effect of bend radius on the impulse transfer characteristics of v hulls |
| topic | Mechanical Engineering |
| url | http://hdl.handle.net/11427/20126 |
| work_keys_str_mv | AT shekharvinayramaswami theeffectofbendradiusontheimpulsetransfercharacteristicsofvhulls AT shekharvinayramaswami effectofbendradiusontheimpulsetransfercharacteristicsofvhulls |