Investigation of the Multiaxial Properties of Snow at High Rates of Deformation,
Final rept. 1982-1985,
MONTANA STATE UNIV BOZEMAN DEPT OF CIVIL ENGINEERING AND ENGINEERING MECHANICS
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A constitutive equation was developed to describe the behavior of snow subjected to high rate multiaxial deformations. This constitutive law is therefore usable in the analysis of stress waves in snow, vehicle mobility in snow, and terminal ballistics, as it is capable of describing the response of the material to deformations which occur at high rates and result with large strains. In addition, the constitutive theory is defined in terms of the microstructural properties of the material, i.e. grain size, bond diameter, pore size, bond length, bond number density, and specific surface area. A stress wave program was also carried out to provide the data with which to evaluate the constitutive theory and to make any empirical adjustments necessary. This process is still being carried out. Finally, effort was devoted to developing a stereological theory with which to evaluate the microstructure of the material. This effort resulted with the ability to calculate all of the microstructural properties mentioned above, irrespective of grain size and shape distributions.
- Snow, Ice and Permafrost