A New Rheological Model for Deposited Snow
スポンサーリンク
概要
- 論文の詳細を見る
Various rheological properties of deposited snow, such as Young's modulus, internal friction, creep, stress relaxation, velocity dependency of a viscosity etc., are explained by a new model. The principal feature of the model is a dashpot which shows the viscosity of a ice-bond between ice particles. It is assumed that the viscosity of the dashpot increases by a sintering between ice particles following the (1-exp (- (<I>t</I>/τ) <SUP>1/2</SUP>)) type function, and decreases proportionally to the viscous work done by the outer force at the ice-bond.<BR>An increase of Young's modulus or the viscosity of a packed snow is due to the sintering between. ice particles and is expressed by this function. Creep and stress relaxation of the deposited snow are also approximately expressed by the function of this type, suggesting that the recovery of ice-bonds by the sintering is also included in the process of creep or stress relaxation. By solving the differential equations of the model which contains two constant springs and the dashpot, experimental creep or stress relaxation curve is explained. Velocity dependency of the viscosity and frictional phenomena on the snow are also discussed by this model.
- 社団法人 日本雪氷学会の論文