Author(s): Martin Gribble; Pat Langhorne

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Keywords: No Keywords

Abstract: The spring break-up of Antarctic sea ice is influenced by the cyclic loading of the ice due to ocean waves. An interest in this fatigue behaviour of sea ice has motivated in situ experiments on cantilever beams of first year sea ice. These creep experiments were performed immediately after a period of variable stress loading that produced some damage, as evidenced by concurrent acoustic emissions. An empirical approach, employing a standard anelastic model, has been applied to the bending of a beam to model the strain under the varying stress period and the constant stress loading. A second model however is believed to provide a better description of strain development, modelling the anelastic strain as a function of time to the power of 0.3.

DOI:

Year: 2002