The Constitutive Model of Solid Ice and Snow with Material Properties Based on the Microscopic Mechanical Deformation

Abstract

The microscopic deformation mechanism was taken into account to research the high efficient solid ice and snow clearing technology. The solid ice and snow constitutive model was established, which the deformation mechanism of snow microstructure and macroscopic continuous behavior were linked together, considering the damage of solid ice and snow depends on the mechanical properties of the snow volume elements of the grain bonds between grains, and using the microstructure factor scale the stress state of microstructure in the continuous stress. The density is 520Kg/m3-600Kg/m3 of the solid ice and snow was selected for studying and the homogeneous triaxial loading test was conducted by using the SJ-1A strain control type triaxial shear instrument. The relations of local strain rate with limit stress was established according to the simulation analysis conducted the constitutive model that was been established, the results found that both of those showed a near-linear relations, it was fit with the experience relations. The computer simulation and experimental curves deviated a little, and the reasonableness of the established solid ice and snow constitutive model was verified. Studied have shown that the failure rule of solid ice and snow can be well described by the constitutive model, which presents a theoretical reference for the design of key icebreaking components.