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A multiaxial differential model of flow in orthotropic polycrystalline ice
AbstractA multiaxial differential model is proposed for pure flow in orthotropic polycrystalline ice. The derivation of the constitutive equations is based on thermodynamics with internal-state variables. The model equations consist of the equations-of-state and evolution equations for the internal variables and a nonelastic deformation variable. The internal state of the material is described in terms of a scalar and a second-rank tensor, which represent isotropic and kinematic hardening in the material, respectively. The nonelastic deformation-rate tensor is additively decomposed into transient and steady-state components. The orthotropic texture of ice during incompressible flow is characterized by five material parameters which define appropriate measures of the thermodynamic forces and deformations. Conventionally-used mechanical tests under constant-stress creep and constant strain-rate loading are sufficient to determine these parameters.
A multiaxial differential model of flow in orthotropic polycrystalline ice
AbstractA multiaxial differential model is proposed for pure flow in orthotropic polycrystalline ice. The derivation of the constitutive equations is based on thermodynamics with internal-state variables. The model equations consist of the equations-of-state and evolution equations for the internal variables and a nonelastic deformation variable. The internal state of the material is described in terms of a scalar and a second-rank tensor, which represent isotropic and kinematic hardening in the material, respectively. The nonelastic deformation-rate tensor is additively decomposed into transient and steady-state components. The orthotropic texture of ice during incompressible flow is characterized by five material parameters which define appropriate measures of the thermodynamic forces and deformations. Conventionally-used mechanical tests under constant-stress creep and constant strain-rate loading are sufficient to determine these parameters.
A multiaxial differential model of flow in orthotropic polycrystalline ice
Sunder, S.Shyam (author) / Wu, Mao S. (author)
Cold Regions, Science and Technology ; 16 ; 223-235
1989-01-01
13 pages
Article (Journal)
Electronic Resource
English
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