Constitutive modelling and finite element analysis in geomechanics

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dc.contributor.advisorMartin, J Ben_ZA
dc.contributor.authorResende, Luís Nuno da Costaen_ZA
dc.date.accessioned2016-08-11T09:46:30Z
dc.date.available2016-08-11T09:46:30Z
dc.date.issued1984en_ZA
dc.descriptionBibliography: pages 208-222.en_ZA
dc.description.abstractThe major objective of the work presented in this thesis was the development of a constitutive model for hard rock at high pressure. The model should capture the important features of material behaviour and should be soundly based on mechanical principles; furthermore it should be simple enough to permit implementation and use in large general purpose finite element codes. As a preliminary exercise, a state-of-the-art plasticity cap model was developed in order to provide a basis for comparison with the new model. Existing cap models were shown to exhibit certain inconsistencies associated with the suppression of a regime of potentially unstable behaviour; these inconsistencies were identified and eliminated in. the formulation which is presented in this thesis. The new rock model was based on internal damage concepts. The model is isotropic, and internal damage is measured by a scalar damage parameter. The properties of the material degrade as the damag~ parameter increases, and an evolution law governs the rate at which damage occurs. The damage model was calibrated against experimental results for Bushveld Norite, which is a very hard, brittle rock. The general form of the model, however, is suitable for application to soil and concrete. Both the plasticity cap model and the damage model were implemented into the finite element code NOSTRUM (developed by the Applied Mechanics Research Unit at the University of Cape Town). Solutions of a series of boundary value problems, including typical mining excavation problems, are presented to illustrate and compare the models.en_ZA
dc.identifier.apacitationResende, L. N. d. C. (1984). <i>Constitutive modelling and finite element analysis in geomechanics</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Civil Engineering. Retrieved from http://hdl.handle.net/11427/21170en_ZA
dc.identifier.chicagocitationResende, Luís Nuno da Costa. <i>"Constitutive modelling and finite element analysis in geomechanics."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Civil Engineering, 1984. http://hdl.handle.net/11427/21170en_ZA
dc.identifier.citationResende, L. 1984. Constitutive modelling and finite element analysis in geomechanics. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Resende, Luís Nuno da Costa AB - The major objective of the work presented in this thesis was the development of a constitutive model for hard rock at high pressure. The model should capture the important features of material behaviour and should be soundly based on mechanical principles; furthermore it should be simple enough to permit implementation and use in large general purpose finite element codes. As a preliminary exercise, a state-of-the-art plasticity cap model was developed in order to provide a basis for comparison with the new model. Existing cap models were shown to exhibit certain inconsistencies associated with the suppression of a regime of potentially unstable behaviour; these inconsistencies were identified and eliminated in. the formulation which is presented in this thesis. The new rock model was based on internal damage concepts. The model is isotropic, and internal damage is measured by a scalar damage parameter. The properties of the material degrade as the damag~ parameter increases, and an evolution law governs the rate at which damage occurs. The damage model was calibrated against experimental results for Bushveld Norite, which is a very hard, brittle rock. The general form of the model, however, is suitable for application to soil and concrete. Both the plasticity cap model and the damage model were implemented into the finite element code NOSTRUM (developed by the Applied Mechanics Research Unit at the University of Cape Town). Solutions of a series of boundary value problems, including typical mining excavation problems, are presented to illustrate and compare the models. DA - 1984 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1984 T1 - Constitutive modelling and finite element analysis in geomechanics TI - Constitutive modelling and finite element analysis in geomechanics UR - http://hdl.handle.net/11427/21170 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21170
dc.identifier.vancouvercitationResende LNdC. Constitutive modelling and finite element analysis in geomechanics. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Civil Engineering, 1984 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/21170en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Civil Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherCivil Engineeringen_ZA
dc.subject.otherGeomechanicsen_ZA
dc.titleConstitutive modelling and finite element analysis in geomechanicsen_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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