Research on the Failure Criterion of Snow-Ice Constitutive Model

Abstract

Solid ice-snow is the collection of impurities and ice-snow particles with adhesion and cohesive force after covering the ground, such as the external load and environmental factors. The destruction of ice-snow and the mechanism of removal determine the difficulty degree of ice-snow removal. Firstly, the constitutive model of ice-snow was established. It is considered that the ice-snow are micro-neck links, and its characteristics mainly depend on the binding properties between ice-snow particles. Secondly, the failure process of solid ice-snow is analyzed by high-speed camera. It is found that the failure mode of solid ice-snow is mainly brittle fracture, and the failure process involves three stages: cutting peeling and contacting. Finally, the failure criterion is established based on the solid ice-snow constitutive model, the form of ice-snow failure and the failure process. Besides considering the tool parameters, the friction factor, snow density and compressive strength, Young modulus, friction angle and the other factors are taken into account due to the temperature change. The establishment of the failure criteria provides a practical reference and theoretical basis for the removal of solid ice-snow.