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dc.contributor.authorXianda, Shen
dc.contributor.authorArson, Chloé
dc.contributor.authorDing, Jihui
dc.contributor.authorChester, Frederick M.
dc.contributor.authorChester, Judith S.
dc.date.accessioned2017-05-16T21:31:12Z
dc.date.available2017-05-16T21:31:12Z
dc.date.issued2017-06
dc.identifier.citationX. Shen, C. Arson, J. Ding, F. M. Chester, & J. Chester (2017). Experimental Characterization of Microstructure Development for Calculating Fabric and Stiffness Tensors in Salt Rock. 51st US Rock Mechanics/Geomechanics Symposium of the American Rock Mechanics Association (ARMA), San Francisco, CA, June 25-28 2017, Paper 17-0568.en_US
dc.identifier.urihttp://hdl.handle.net/1853/58102
dc.descriptionCopyright © 2017 by the American Rock Mechanics Association.en_US
dc.descriptionARMA 17-568en_US
dc.description.abstractUniaxial consolidation tests were conducted on reagent-grade granular salt in dry conditions at 150 C. 2Dmicroscopic images, parallel to the axis of consolidation, were obtained at several stages of progressive consolidation from 15% to 3% porosity. Microstructure image analyses were performed to obtain probability density functions (PDFs) of the area, solidity, coordination number, orientation, elongation and roundness of the grains, as well as the PDFs of the branch lengths, branch orientations and solid volume fraction, defined locally over polygons with edges matching grain centroids. It is found that sample deformation is mostly due to grain rearrangement and that upon consolidation, grains become less convex, and elongate in the direction perpendicular to the loading axis. Four fabric tensors were calculated to assess microstructure anisotropy induced by grain orientation, branch length orientation, grain solidity and local solid volume fraction. Fabric tensors were diagonal and orthogonal. Therefore, their product was used to define a global fabric tensor, which was introduced in the expression of the stiffness tensors. The constitutive parameters were calibrated against the consolidation tests. The approach paves the way to enrich continuum damage and healing mechanics model with fabric descriptors that can play the role of internal variables.en_US
dc.language.isoen_USen_US
dc.publisherGeorgia Institute of Technologyen_US
dc.subjectConsolidationen_US
dc.subjectDeformationen_US
dc.subjectFabric tensorsen_US
dc.subjectProbability density functionsen_US
dc.titleExperimental Characterization of Microstructure Development for Calculating Fabric and Stiffness Tensors in Salt Rocken_US
dc.typePost-printen_US
dc.typeProceedingsen_US
dc.contributor.corporatenameGeorgia Institute of Technology. School of Civil and Environmental Engineeringen_US
dc.contributor.corporatenameTexas A & M University. Center for Tectonophysicsen_US
dc.contributor.corporatenameTexas A & M University. Department of Geology and Geophysicsen_US


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