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

Ding, Jihui; Chester, Frederick M.; Chester, Judith S.; Xianda, Shen; Arson, Chloé

Title:

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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