An Application of Plasticity Model for Ice Deformation Characteristics

J. Ocean Eng. Technol. 1990;4(2):15-21.

Choe Gyeong-Sik

수변형 특성에 있어서 소성 모델의 응용

최경식

한국해양대학 해양공학과

Keywords: Plasticity Model, Continuum Damage Mechanics Model, Failure Criterion, Polycrystalline Ice

핵심용어: 소성모델, 연속체손상역학모델, 항복기준, 다결정빙

Abstract

This 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 asymptotic exponential failure criterion. This criterion is suite 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.