Author(s): M. A. Gribble; P. J. Langhorne
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Keywords: No Keywords
Abstract: In late spring some of the first year sea ice in MCMurdo Sound breaks up due to wave action. An interest in the physical processes involved in floe generation has motivated some small scale fatigue tests. These tests have been performed on in situ cantilever beams of laboratory grown saline ice. Tests were performed under load control with zero mean stress. The stress and strain relationship is examined for a loading period of 8.4 seconds. A variety of ice types are used with average growth rates ranging from 5 x 10.7 to 7 X 10.7 ms· l. The influence of the underlying microstructure is exantined. A comparison is also made between these laboratory results and the results obtained from similar tests performed on in situ sea ice cantilever beams in Antarctica.
Year: 1998