Ice Strength as a Function of Hydrostatic Pressure and Temperature
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
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A temperature model has been developed that describes the ice strength in a multiaxial stress state over a wide spectrum of negative temperatures. The model takes into account the anomalous behavior of ice under high hydrostatic pressure, when its strength reaches a maximum, and then gradually decreases with the pressure increase. It has been shown that strength of ice under high hydrostatic pressure is described by a parabolic yield criterion with only three fundamental parameters, ice cohesion, internal friction angle, and ice melting pressure, which all have a definite physical meaning and are functions of temperature. The model has been verified using test data on the strength of iceberg ice and laboratory made polycrystalline freshwater ice under triaxial compression at strain rates between 10exp -3 and 10exp -5 S-1 over the temperature range between -1 deg and -40 deg C.
- Snow, Ice and Permafrost