Titre du document / Document title
The effect of particles on dynamic recrystallization and fabric development of granular ice during creep
Auteur(s) / Author(s)
SONG Min (1) ;
BAKER Ian (1) ;
COLE David M. (2) ;
Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)
(1) Thayer School of Engineering, Dartmouth College, Hanover, New Hampshire 03755-8000, ETATS-UNIS
(2) US Army Cold Regions Research and Engineering Laboratory, 72 Lyme Road, Hanover, New Hampshire 03755-1290, ETATS-UNIS
Résumé / Abstract
The mechanical behavior and microstructural evolution of laboratory-prepared, particle-free fresh-water ice and ice with 1 wt.% (∼0.43 vol.%) silt-sized particles were investigated under creep with a stress level of 1.45 MPa at -10°C. The particles were present both within the grains and along the grain boundaries. The creep rates of specimens with particles were always higher than those of particle-free ice. Dynamic recrystallization occurred for both sets of specimens, with new grains nucleating along grain boundaries in the early stages of creep. The ice with particles showed a higher nucleation rate. This resulted in a smaller average grain-size for the ice with particles after a given creep strain. Fabric studies indicated that ice with particles showed a more random orientation of c axes after creep to ∼10% strain than the particle-free ice.
Revue / Journal Title
Journal of Glaciology
ISSN
0022-1430
CODEN JOGLAO
Source / Source
2005, vol. 51, n
o174, pp. 377-382 [6 page(s) (article)] (34 ref.)
Langue / Language
Anglais
Editeur / Publisher
International Glaciological Society, Cambridge, ROYAUME-UNI
(1947)
(Revue)
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Localisation / Location
INIST-CNRS, Cote INIST : 5524, 35400013574141.0050
Nº notice refdoc (ud4) : 17512841
