Author(s): M. D. Coon; D. C. Echert; G. S. Knoke
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Abstract: This paper describes the determination of geophysical pack-ice stress from sea-ice stress measurements made during the U. S. Navy Office of Naval Research Sea Ice Mechanics Initiative field program. The measurements represent large-scale pack-ice stress averaged over the dimension of the floe used to measure the pack-ice stress. We describe the conditions under which the measured ice stress represents the geophysical stress. Also described is the interpretation of the data in terms of a pack-ice failure or yield surface. These data are shown consistent with the indentation pressure-area curve, which represents the strength of ice over scales from laboratory samples to pack ice elements of hundreds of kilometers.
Year: 1998