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A study of localized failure modes in brittle materials
Localization studies arise from the need to accurately model the behaviour of materials which exhibit instabilities due to strain softening or geometric effects. Localization in finite element modelling of brittle materials such as concrete and rock is a relatively unexplored area in computational m...
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| Format: | Thesis |
| Language: | Eng |
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Department of Civil Engineering
2016
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| _version_ | 1867613231372042240 |
|---|---|
| access_status_str | Open Access |
| author | Burger, B B |
| author2 | Resende, Luís Nuno da Costa |
| author_browse | Burger, B B Resende, Luís Nuno da Costa |
| author_facet | Resende, Luís Nuno da Costa Burger, B B |
| author_sort | Burger, B B |
| collection | Thesis |
| description | Localization studies arise from the need to accurately model the behaviour of materials which exhibit instabilities due to strain softening or geometric effects. Localization in finite element modelling of brittle materials such as concrete and rock is a relatively unexplored area in computational mechanics, and this work applies current concepts to an isotropic damage model. The onset of localization is characterised by a bifurcation, where spatially uniform deformation is replaced by highly localized bands of large strain. Simple bifurcation analysis techniques are used, and are shown to extend the present predictive capability of the damage model and to indicate the direction of further refinement. Numerical studies of localization in concrete and norite are presented, together with boundary value problems of importance in mining applications. It is shown that qualitative agreement is obtained with experimental results. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/17652 |
| institution | University of Cape Town (South Africa) |
| language | Eng |
| last_indexed | 2026-06-10T12:32:51.499Z |
| 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 Civil Engineering |
| publisherStr | Department of Civil Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/17652 A study of localized failure modes in brittle materials Burger, B B Resende, Luís Nuno da Costa Civil Engineering Localization studies arise from the need to accurately model the behaviour of materials which exhibit instabilities due to strain softening or geometric effects. Localization in finite element modelling of brittle materials such as concrete and rock is a relatively unexplored area in computational mechanics, and this work applies current concepts to an isotropic damage model. The onset of localization is characterised by a bifurcation, where spatially uniform deformation is replaced by highly localized bands of large strain. Simple bifurcation analysis techniques are used, and are shown to extend the present predictive capability of the damage model and to indicate the direction of further refinement. Numerical studies of localization in concrete and norite are presented, together with boundary value problems of importance in mining applications. It is shown that qualitative agreement is obtained with experimental results. 2016-03-11T14:25:20Z 2016-03-11T14:25:20Z 1987 Master Thesis Masters MSc (Eng) http://hdl.handle.net/11427/17652 Eng application/pdf Department of Civil Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Civil Engineering Burger, B B A study of localized failure modes in brittle materials |
| thesis_degree_str | Master's |
| title | A study of localized failure modes in brittle materials |
| title_full | A study of localized failure modes in brittle materials |
| title_fullStr | A study of localized failure modes in brittle materials |
| title_full_unstemmed | A study of localized failure modes in brittle materials |
| title_short | A study of localized failure modes in brittle materials |
| title_sort | study of localized failure modes in brittle materials |
| topic | Civil Engineering |
| url | http://hdl.handle.net/11427/17652 |
| work_keys_str_mv | AT burgerbb astudyoflocalizedfailuremodesinbrittlematerials AT burgerbb studyoflocalizedfailuremodesinbrittlematerials |