氷變形특성에 있어서 塑性 모델의 응용

An Application of Plasticity Model for Ice Deformation Characteristics

The study focuses the mechanical deformation response predicted by the plasticity model for polycrystalline ice. To describe various deformation characteristics, ice is idealized as a perfectly plastic material using an asymtotic exponential failure criterion. This criterion is suited for describing materials which exhibit brittle deformation at low hydrostatic pressure and ductile deformation at high hydrostatic pressure. The results are compared to those of continuum damage mechanics model. Plasticity model shows good agreement with damage model and experimental results for high confining pressures even. at high strain-rates which is usually considered as a brittle condition under uniaxial compression.