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Mixed methods and reduced integration for the circular arch problem
The boundary-value problem for linear elastic circular arches is studied. The governing equations are based on the Timoshenko-Reissner-Mindlin hypotheses. The problem is formulated in both the standard and mixed variational forms which include a parameter relating to the thickness of the arch. Exist...
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| Format: | Thesis |
| Language: | English |
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Department of Mathematics and Applied Mathematics
2024
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| _version_ | 1867613276615999488 |
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| access_status_str | Open Access |
| author | Volpi, M B |
| author2 | Reddy, Dayanand |
| author_browse | Reddy, Dayanand Volpi, M B |
| author_facet | Reddy, Dayanand Volpi, M B |
| author_sort | Volpi, M B |
| collection | Thesis |
| description | The boundary-value problem for linear elastic circular arches is studied. The governing equations are based on the Timoshenko-Reissner-Mindlin hypotheses. The problem is formulated in both the standard and mixed variational forms which include a parameter relating to the thickness of the arch. Existence and uniqueness of solutions to these equivalent problems is established and the corresponding discrete problems are studied. Finite element approximations to the mixed problem are shown to be stable and convergent, and selective reduced integration applied to the standard discrete problem renders it equivalent to the mixed problem. The results of numerical experiments are presented; these confirm the convergent behaviour of the mixed problem. For the standard problem with full integration convergence is suboptimal or nonexistent for small values of the thickness parameter, while for the mixed or selectively reduced integration problem the numerical rates of convergence coincide with those predicted by the theory. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/40596 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:33.643Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2024 |
| publishDateRange | 2024 |
| publishDateSort | 2024 |
| publisher | Department of Mathematics and Applied Mathematics |
| publisherStr | Department of Mathematics and Applied Mathematics |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/40596 Mixed methods and reduced integration for the circular arch problem Volpi, M B Reddy, Dayanand Mathematics and Applied Mathematics The boundary-value problem for linear elastic circular arches is studied. The governing equations are based on the Timoshenko-Reissner-Mindlin hypotheses. The problem is formulated in both the standard and mixed variational forms which include a parameter relating to the thickness of the arch. Existence and uniqueness of solutions to these equivalent problems is established and the corresponding discrete problems are studied. Finite element approximations to the mixed problem are shown to be stable and convergent, and selective reduced integration applied to the standard discrete problem renders it equivalent to the mixed problem. The results of numerical experiments are presented; these confirm the convergent behaviour of the mixed problem. For the standard problem with full integration convergence is suboptimal or nonexistent for small values of the thickness parameter, while for the mixed or selectively reduced integration problem the numerical rates of convergence coincide with those predicted by the theory. 2024-10-21T10:56:35Z 2024-10-21T10:56:35Z 1991 2024-07-19T10:52:44Z Thesis / Dissertation Masters MSc http://hdl.handle.net/11427/40596 eng application/pdf Department of Mathematics and Applied Mathematics Faculty of Science |
| spellingShingle | Mathematics and Applied Mathematics Volpi, M B Mixed methods and reduced integration for the circular arch problem |
| thesis_degree_str | Master's |
| title | Mixed methods and reduced integration for the circular arch problem |
| title_full | Mixed methods and reduced integration for the circular arch problem |
| title_fullStr | Mixed methods and reduced integration for the circular arch problem |
| title_full_unstemmed | Mixed methods and reduced integration for the circular arch problem |
| title_short | Mixed methods and reduced integration for the circular arch problem |
| title_sort | mixed methods and reduced integration for the circular arch problem |
| topic | Mathematics and Applied Mathematics |
| url | http://hdl.handle.net/11427/40596 |
| work_keys_str_mv | AT volpimb mixedmethodsandreducedintegrationforthecirculararchproblem |