Mechanical Properties of Fresh Ice Core from Dye 3, Greenland
- C.C. Langway Jr.,
- H. Oeschger and
- W. Dansgaard
Published Online: 18 MAR 2013
Copyright 1985 by the American Geophysical Union.
Greenland Ice Core: Geophysics, Geochemistry, and the Environment
How to Cite
Shoji, H. and Langway, C. C. (1985) Mechanical Properties of Fresh Ice Core from Dye 3, Greenland, in Greenland Ice Core: Geophysics, Geochemistry, and the Environment (eds C.C. Langway, H. Oeschger and W. Dansgaard), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM033p0039
- Published Online: 18 MAR 2013
- Published Print: 1 JAN 1985
Print ISBN: 9780875900575
Online ISBN: 9781118664155
- Ice sheets—Greenland—Addresses, essays, lectures;
- Greenland Ice Sheet Program
Mechanical property studies were carried out on fresh ice-core samples as they were recovered at Dye 3, Greenland. Experiments were conducted in uniaxial compression tests under constant crosshead speed, simpler shear tests under constant load, and indentation hardness tests with Vickers pyramidal indenîer. Tests were made within a one-month period after each specimen was recovered to minimize the effect of volume relaxation. Experimental results from uniaxial compression and simple shear tests were analyzed in effective shear stress and effective strain rate space, taking into account the effect of high-pressure air bubbles included in each sample. The strain rate of Wisconsin ice is about one order of magnitude higher than that of randomly oriented laboratory ice at the same stress level, possibly enhanced by the effect of impurities in addition to that of fabrics. Indentation deformation was observed to be attributed to pileup, cracking, and creep of ice material around an indenter with c-axis orientation dependency.