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dc.contributor.advisorMedina-Cetina, Zenon
dc.creatorZhang, Yanbei
dc.date.accessioned2011-10-21T22:03:35Z
dc.date.accessioned2011-10-22T07:08:54Z
dc.date.available2011-10-21T22:03:35Z
dc.date.available2011-10-22T07:08:54Z
dc.date.created2010-08
dc.date.issued2011-10-21
dc.date.submittedAugust 2010
dc.identifier.urihttp://hdl.handle.net/1969.1/ETD-TAMU-2010-08-8110
dc.description.abstractA discrete element model (DEM) capable of reproducing the mechanistic behavior of a triaxial compressive test performed on a Vosges sandstone specimen is presented considering similar experimental testing conditions and densely packed spherical elements with low lock-in stress. The main aim of this paper is to illustrate the calibration process of the model‟s micro-parameters when obtained from the experimental meso-parameters measured in the lab. For this purpose, a probabilistic inverse method is introduced to fully define the micro-parameters of the particle models through a joint probability density function, which is conditioned on the experimental observations obtained during a series of tests performed at the L3S-R France. The DEM captures successfully some of the rock mechanical behavior features, including the global stress-strain and failure mechanisms. Results include a detailed parametric analysis consisting of varying each DEM parameter at the time and measuring the model response on the strain-stress domain. First order statistics on probabilistic results show the adequacy of the model to capture the experimental data, including a measure of the DEM performance for different parameter combinations. Also, joint probability density functions and cross-correlations among the micro-parameters are presented.en
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.subjectProbabilistic calibrationen
dc.subjectdiscrete element modelingen
dc.subjecttriaxial testen
dc.subjectfailure mechanismen
dc.subjectVosges sandstoneen
dc.titleProbabilistic Calibration of a Discrete Particle Modelen
dc.typeThesisen
thesis.degree.departmentCivil Engineeringen
thesis.degree.disciplineCivil Engineeringen
thesis.degree.grantorTexas A&M Universityen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelMastersen
dc.contributor.committeeMemberAubeny, Charles P.
dc.contributor.committeeMemberArroyave, Raymundo
dc.type.genrethesisen
dc.type.materialtexten


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