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Record #96600:

Isotropic and anisotropic flow relations for ice dynamics / T.H. Jacka, William F. Budd.

Title: Isotropic and anisotropic flow relations for ice dynamics / T.H. Jacka, William F. Budd.
Author(s): Jacka, T. H.
Budd, William F.
Date: 1989.
Publisher: Cambridge: International Glaciological Society
In: Annals of Glaciology. (1989.), Vol. 12 (1989)
Abstract: Presents flow relation for minimum strain-rates for isotropic ice, which has been compiled from laboratory tests in shear and compression, and covers temperature and stress ranges typical of natural ice masses. Ice in natural ice masses is mostly anisotropic. Three cores drilled at Law Dome, Antarctica, are used as examples to illustrate different anisotropies that develop in ice masses in relation to stress configurations and accumulated strains. For shear- or compression-stress configurations, anisotropic flow rates can be derived as enhancements of minimum isotropic flow rates for particular stress, temperatures and stress configuration. For compression, enhancement approaches 3 asymptotically. For shear, it may be as much as 8.
Notes:

Annals of Glaciology. Vol. 12 :81-84 (1989).

Keywords: 551.324.51 -- Land ice, theory of flow.
551.32 -- Glaciology.
551.324 -- Land ice.
539.42 -- Ice, tensile strength.
E5 -- Glaciology: land ice.
SPRI record no.: 96600

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500 ## ‡aAnnals of Glaciology. Vol. 12 :81-84 (1989).
520 3# ‡aPresents flow relation for minimum strain-rates for isotropic ice, which has been compiled from laboratory tests in shear and compression, and covers temperature and stress ranges typical of natural ice masses. Ice in natural ice masses is mostly anisotropic. Three cores drilled at Law Dome, Antarctica, are used as examples to illustrate different anisotropies that develop in ice masses in relation to stress configurations and accumulated strains. For shear- or compression-stress configurations, anisotropic flow rates can be derived as enhancements of minimum isotropic flow rates for particular stress, temperatures and stress configuration. For compression, enhancement approaches 3 asymptotically. For shear, it may be as much as 8.
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650 07 ‡a551.32 -- Glaciology.‡2udc
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