Author(s): David M. Cole; Reed A. Johnson; Glenn D. Durell
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Keywords: No Keywords
Abstract: This paper presents methodology to determine the average shear stress resolved on the basal planes for ice polycrystals and demonstrates the validity of the analysis for core specimens of aligned first-year sea ice. Careful examination of the constitutive behavior of the ice using laboratory cyclic loading experiments revealed that the elastic and anelastic (time-dependent recoverable) strains varied systematically with the calculated orientation factor. Analysis employing a mechanistic model of the cyclic loading response shows very good agreement between theory and observation. The findings quantify an important link between the microstructure of first-year sea ice and its mechanical properties, and indicate that the anelastic behavior of sea ice can be largely explained by basal plane slip alone.
Year: 1996