Author(s): M. D. Coon; R. J. Evans; D. H. Gibson
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Keywords: No Keywords
Abstract: A proposed anisotropic failure criterion for sea ice is examined; failure is governed by shear and is pressure sensitive at low pressure but independent of pressure at higher loads. The criterion is shown to represent laboratory test data for uniaxial, biaxial, triaxial and plane strain tests. The failure criterion is applied to an isotropic ice sheet and is used to determine indentation pressures for a rectangular indentor whose surface is normal to the plane of the ice sheet. Four solutions are relevant, corresponding to in-plane and out-of-plane failure of both Mohr-Coulomb and Tresca solids. Indentation pressures are found for various ice velocities, structure diameters and ice thickness to illustrate the range of application of the solutions.
Year: 1984