Response of thin circular plates to central blast loading

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dc.contributor.advisorNurick, Gerald Nen_ZA
dc.contributor.authorBimha, Richard Ernesten_ZA
dc.date.accessioned2014-10-17T07:31:14Z
dc.date.available2014-10-17T07:31:14Z
dc.date.issued1996en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractThe 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.en_ZA
dc.identifier.apacitationBimha, R. E. (1996). <i>Response of thin circular plates to central blast loading</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering. Retrieved from http://hdl.handle.net/11427/8488en_ZA
dc.identifier.chicagocitationBimha, Richard Ernest. <i>"Response of thin circular plates to central blast loading."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1996. http://hdl.handle.net/11427/8488en_ZA
dc.identifier.citationBimha, R. 1996. Response of thin circular plates to central blast loading. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Bimha, Richard Ernest AB - 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. DA - 1996 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1996 T1 - Response of thin circular plates to central blast loading TI - Response of thin circular plates to central blast loading UR - http://hdl.handle.net/11427/8488 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/8488
dc.identifier.vancouvercitationBimha RE. Response of thin circular plates to central blast loading. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 1996 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/8488en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Mechanical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherMechanical Engineeringen_ZA
dc.titleResponse of thin circular plates to central blast loadingen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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