Title:
Mechanical Behavior and Microstructure Development in Consolidation of Nominally Dry Granular Salt

dc.contributor.author Ding, Jihui
dc.contributor.author Chester, Frederick M.
dc.contributor.author Chester, Judith S.
dc.contributor.author Zhu, Cheng
dc.contributor.author Arson, Chloé
dc.contributor.corporatename Georgia Institute of Technology. School of Civil and Environmental Engineering en_US
dc.contributor.corporatename Texas A & M University. Department of Civil Engineering en_US
dc.date.accessioned 2016-07-07T14:38:09Z
dc.date.available 2016-07-07T14:38:09Z
dc.date.issued 2016-06
dc.description Presented at the 50th US Rock Mechanics/Geomechanics Symposium of the American Rock Mechanics Association (ARMA), Houston, TX, 26-29 June 2016. en_US
dc.description Copyright © 2016 by the American Rock Mechanics Association
dc.description.abstract Uniaxial consolidation of granular salt is carried out to study the mechanical behavior and fabric development in a material that deforms by microscopic brittle and intracrystalline-plastic processes. Dry granular salt is sieved to produce well-sorted size fractions. The granular salt is consolidated in a heated cell at axial stresses up to 90 MPa and temperatures of 100 - 200 ˚C to document stress-consolidation relationships and microstructural development. Polished and chemically-etched petrographic sections of salt samples prior to and after deformation at 150˚C are studied using transmitted- and reflected-light optical microscopy. We show that temperature has profound effect on porosity reduction during consolidation. At tested conditions, the dominant deformation mechanism is crystal plasticity; brittle deformation is largely suppressed. Samples consolidated at higher maximum axial stress develop higher overall dislocation densities. The distribution of dislocations, however, is strongly heterogeneous from grain to grain because of the complex grain-scale loading geometries and the distribution of intragranular flaws such as fluid inclusions. Static recrystallization occurs in some highly strained areas, but overall is minor at 150˚C. The experiments help to improve our understanding of consolidation, and serve to guide the fabrication of synthetic rock salt as experimental material, as well as to inform and test constitutive models of deformation of granular salt for engineering needs. en_US
dc.embargo.terms null en_US
dc.identifier.citation J. Ding, F.M. Chester, J.S. Chester, C. Zhu, C. Arson. "Mechanical Behavior and Microstructure Development in Consolidation of Nominally Dry Granular Salt". ARMA 16-261, Proc. 50th US Rock Mechanics/Geomechanics Symposium. en_US
dc.identifier.uri http://hdl.handle.net/1853/55352
dc.publisher Georgia Institute of Technology en_US
dc.subject Material deformation en_US
dc.subject Uniaxial consolidation en_US
dc.subject Mechanical behavior en_US
dc.subject Granular salt deformation en_US
dc.title Mechanical Behavior and Microstructure Development in Consolidation of Nominally Dry Granular Salt en_US
dc.type Text
dc.type.genre Post-print
dc.type.genre Proceedings
dspace.entity.type Publication
local.contributor.author Arson, Chloé
local.contributor.author Zhu, Cheng
local.contributor.corporatename School of Civil and Environmental Engineering
local.contributor.corporatename College of Engineering
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relation.isAuthorOfPublication d28f1a84-f07d-40ec-bed3-60bc4c140551
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relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
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