Behavioural characteristics and constituitive modelling of Athabasca tar sand at low effective stresses

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dc.contributor.advisorWong, Ronald C. K.
dc.contributor.authorSamieh, Ahmed Mosalem
dc.date.accessioned2005-07-29T22:12:35Z
dc.date.available2005-07-29T22:12:35Z
dc.date.issued1995
dc.descriptionBibliography: p. 213-224.en
dc.description.abstractIn this thesis, the behaviour of Athabasca oil sand at low effective stresses is investigated. A series of consolidated drained triaxial tests was performed on undisturbed specimens at a confining pressure range of 30 kPa to 750 kPa. The influence of testing conditions, namely slenderness ratio and end conditions, on the behavioural characteristics of the material is investigated. The results of the shear tests revealed that the use of short specimens with free ends promotes the homogeneity of the sheared specimens. This homogeneity has been attested by the results of magnetic resonance imaging. The results of the shear tests exhibited that at low effective stresses, Athabasca oil sand does not reach to the critical state by the end of the tests. Thus, it is not possible to determine the critical state characteristics from these experimental results. The critical state characteristics of the material were determined from consolidated drained tests on reconstituted oil-free Athabasca sand specimens. A new algorithm is developed to determine the homogenous stress-strain and volume change responses of the material until the critical state is approached. A constitutive model, based on the generalized disturbed state concept, is established to model the response of Athabasca oil sand at low effective stresses. The response of Athabasca oil sand is expressed in terms of the responses of its reference states, namely the virgin and the fully disturbed states, through a disturbance function. A generalized single surface plasticity model is incorporated for modelling the virgin state of the material, whereas the fully disturbed state is assumed to be the critical state. The model parameters required to simulate both the experimental and the homogenous responses of Athabasca oil sand are identified and evaluated. The model is verified against both the experimental and the homogenous responses of the material.en
dc.format.extentxx, 246 leaves : ill. ; 30 cm.en
dc.identifier.citationSamieh, A. M. (1995). Behavioural characteristics and constituitive modelling of Athabasca tar sand at low effective stresses (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/11521en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/11521
dc.identifier.isbn0612128016en
dc.identifier.lccTN 873 C22 S36 1995en
dc.identifier.urihttp://hdl.handle.net/1880/29850
dc.language.isoeng
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subject.lccTN 873 C22 S36 1995en
dc.subject.lcshOil sands industry
dc.subject.lcshAthabasca Oil Sands Project
dc.titleBehavioural characteristics and constituitive modelling of Athabasca tar sand at low effective stresses
dc.typedoctoral thesis
thesis.degree.disciplineCivil Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameDoctor of Philosophy (PhD)
ucalgary.item.requestcopytrue
ucalgary.thesis.notesUARCen
ucalgary.thesis.uarcreleaseyen
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