| || Estimation of Rheological Properties of Snow Subjected to Creep
Author : Chandel, Chaman;Srivastava, P. K. ;Upadhyay, Agraj
Source : Defence Science Journal ; Vol:57(4) ; 2007 ; pp 393-401
Subject : 53 Applied Physics;532 Fluid Mechanics
Keywords : Snow;Snowpack;Creep;Rheological model creep behaviour;Visco-elastic model;Rheological properties;Snow mechanics;Creep deformation behaviour;Maxwell model;Burger’s model
Abstract : Creep is one of the most important phenomenons to determine the settlement of snow. Snow, in natural conditions, exists at temperature quite close to its melting point and deforms very fast. The settlement of snow is the result of creep phenomenon under the action of overburden pressure as well as due to metamorphic processes going on within the snowpack. In this communication, creep behaviour of snow is simulated with four-parameter viscoelastic fluid model. This viscoelastic character is basically controlled or monitored by various rheological constants. Estimation of all the rheological constants in the four-parameter viscoelastic fluid model appropriate for the creep properties of snow is done. Total 91 uniaxial unconfined constant stress experiments on sieved snow were conducted at controlled temperature conditions. The effect of density and varying temperature on these constants is found to be remarkable.