Microcrack Network Development in Salt-Rock During Cyclic Loading at Low Confining Pressure

dc.contributor.author Ding, Jihui
dc.contributor.author Chester, Frederick M.
dc.contributor.author Chester, Judith S.
dc.contributor.author Xianda, Shen
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. Center for Tectonophysics en_US
dc.contributor.corporatename Texas A & M University. Department of Geology and Geophysics en_US
dc.date.accessioned 2017-05-18T12:59:02Z
dc.date.available 2017-05-18T12:59:02Z
dc.date.issued 2017-06
dc.description Copyright © 2017 by the American Rock Mechanics Association. en_US
dc.description ARMA 17-0308 en_US
dc.description.abstract Triaxial compression tests of synthetic salt-rock are conducted to investigate microfracture development in a semibrittle polycrystalline aggregate. The salt-rock is produced from uniaxial consolidation of granular halite at 150 °C. Following consolidation, the sample is deformed by cyclic loading at room temperature and low confining pressure (Pc = 1 MPa). Load cycles are performed within the elastic regime, up to yielding, and after successive increments of steady ductile flow. At the tested conditions, the samples exhibit ductile behavior with slight work hardening. The microstructure at different stages of deformation indicates that grain-boundary cracking is the dominant brittle deformation mechanism. Microcracking is influenced by the loading configuration and the geometric relationships between neighboring grains. These microcracks display a preferred orientation parallel to the load axis. With cyclic loading, microcracks increase in density and form linked arrays parallel to the direction of loading. As the linked arrays lengthen, grain contacts are progressively opened, which eventually leads to loss of cohesion along surfaces parallel to the loading direction. The observations of crack-network development in salt-rock can improve our understanding of progressive damage and spalling at salt cavern walls. en_US
dc.identifier.citation J. Ding, F. M. Chester, J. Chester, X. Shen, & C. Arson (2017). Microcrack Network Development in Salt Rock During Cyclic Loading at Low Confining Pressure. 51st US Rock Mechanics/Geomechanics Symposium of the American Rock Mechanics Association, San Francisco, CA, June 25-28 2017, Paper 17-0308. en_US
dc.identifier.uri http://hdl.handle.net/1853/58106
dc.language.iso en_US en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Compression en_US
dc.subject Crack-network development en_US
dc.subject Cyclic loading en_US
dc.subject Deformation en_US
dc.subject Grain en_US
dc.subject Grain boundary cracking en_US
dc.subject Low confining pressure en_US
dc.subject Salt rock en_US
dc.subject Uniaxial consolidation en_US
dc.title Microcrack Network Development in Salt-Rock During Cyclic Loading at Low Confining Pressure 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.corporatename School of Civil and Environmental Engineering
local.contributor.corporatename College of Engineering
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relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
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