Abstract
Stress and temperature dependences of the strain rate for ice single crystals are derived from evolution equations of mobile dislocation densities. This model is based on the mechanisms generally agreed for multiplication and annihilation of mobile dislocations in monocrystalline ice. It gives the correct stress exponent value n = 2 for steady state creep or constant strain rate deformation. The activation energy predicted by the model is that for dislocation climb, in agreement with experimental activation energies that are closer to the self-diffusion energy than to the activation energy associated with dislocation glide velocities.
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