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On internal friction and cohesion in unconsolidated ice rubble
AbstractUnconsolidated ice rubble is a mass of ice fragments, often floating in water, that has not solidified by freezing of pore water or by freeze bonding between individual ice-rubble fragments. It is argued herein that unconsolidated ice rubble undergoing continuous shear deformation is essentially cohesionless; i.e., in terms of the Mohr-Coulomb failure criterion, it should not exhibit a cohesive intercept at zero confining pressure and at large shear deformation.Contacting pieces of submerged ice rubble, however, have a propensity to freeze bond with one another, even at very low confining pressures and in nonfrigid air, such that unconsolidated ice rubble may tend to self-solidify. It is this propensity that significantly contributes to the comparatively large values of internal-friction angle that have been reported for ice rubble, and which may cause relationships between shear strength and confining pressure to be nonunique.
On internal friction and cohesion in unconsolidated ice rubble
AbstractUnconsolidated ice rubble is a mass of ice fragments, often floating in water, that has not solidified by freezing of pore water or by freeze bonding between individual ice-rubble fragments. It is argued herein that unconsolidated ice rubble undergoing continuous shear deformation is essentially cohesionless; i.e., in terms of the Mohr-Coulomb failure criterion, it should not exhibit a cohesive intercept at zero confining pressure and at large shear deformation.Contacting pieces of submerged ice rubble, however, have a propensity to freeze bond with one another, even at very low confining pressures and in nonfrigid air, such that unconsolidated ice rubble may tend to self-solidify. It is this propensity that significantly contributes to the comparatively large values of internal-friction angle that have been reported for ice rubble, and which may cause relationships between shear strength and confining pressure to be nonunique.
On internal friction and cohesion in unconsolidated ice rubble
Ettema, Robert (author) / Urroz, Gilberto E. (author)
Cold Regions, Science and Technology ; 16 ; 237-247
1989-02-03
11 pages
Article (Journal)
Electronic Resource
English
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