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Response of thin circular plates to central blast loading
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Mechanical Engineering
2014
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| _version_ | 1867614250601545728 |
|---|---|
| access_status_str | Open Access |
| author | Bimha, Richard Ernest |
| author2 | Nurick, Gerald N |
| author_browse | Bimha, Richard Ernest Nurick, Gerald N |
| author_facet | Nurick, Gerald N Bimha, Richard Ernest |
| author_sort | Bimha, Richard Ernest |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/8488 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:49:03.753Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| 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:11427/8488 Response of thin circular plates to central blast loading Bimha, Richard Ernest Nurick, Gerald N Mechanical Engineering Includes bibliographical references. The large ductile deformation response and rupture of thin circular metal plates subjected to central blast loading is investigated using the ABAQUS general purpose finite element code. The finite element code incorporates non-linear geometry and material effects as well as strain rate sensitivity. A material failure model is also incorporated. The SA.XI axisymmetric sheet elements are used to model the plate. The shell element uses a theory that includes shear deformation effects but degenerates to the Kirchoff classical thin shell theory for thin shell elements. An explicit time integration scheme is considered more suitable than an implicit scheme for the analysis. A uniform mesh with 1000 elements is used in modelling the experiments. The mesh size is chosen to satisfy the conditions for numerical stability in the explicit analysis scheme. Two boundary conditions are considered; a plate clamped to its supports by bolts and a plate fully built-in. The pressure loading from the explosive charge is assumed to be uniform over the loaded area and decaying exponentially to the plate boundary. The pressure pulse is assumed to be rectangular. Material parameters are obtained from uniaxial quasi-static material tensile test results. The predicted plate responses; mid-plate permanent deflections, permanent deformation shape, strain rate dependence, strain predictions, response time and rupture are compared to experimental data and/or analytical and other numerical solutions. The predicted responses compare reasonably well with measured experimental results and/or with reported analytical and other numerical predictions. 2014-10-17T07:31:14Z 2014-10-17T07:31:14Z 1996 Master Thesis Masters MSc http://hdl.handle.net/11427/8488 eng application/pdf Department of Mechanical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Mechanical Engineering Bimha, Richard Ernest Response of thin circular plates to central blast loading |
| thesis_degree_str | Master's |
| title | Response of thin circular plates to central blast loading |
| title_full | Response of thin circular plates to central blast loading |
| title_fullStr | Response of thin circular plates to central blast loading |
| title_full_unstemmed | Response of thin circular plates to central blast loading |
| title_short | Response of thin circular plates to central blast loading |
| title_sort | response of thin circular plates to central blast loading |
| topic | Mechanical Engineering |
| url | http://hdl.handle.net/11427/8488 |
| work_keys_str_mv | AT bimharichardernest responseofthincircularplatestocentralblastloading |