Quasi liquid layer-pressure asymmetrical model for the motion of of a curling rock on ice surface

In this paper, we present a new model based on Quasi liquid layer to explain why the direction of lateral motion of the curling rock on ice surface is opposite to the other material surface. As we know, under the action of inertial force, the pressure on the ice surface in front of curling is greater than that on the back. So we assert that the firction coefficientin front of curling is lower than that on the bank under different pressure. In order to explain the pressure impact on friction coefficient, we qualitatively account for the reason why the coefficient of friction increases under the pressure and approximately calculated the relationship between the pressure and the thickness of the quasi_liquid layer on the ice surface. Then we calculate the function expression between temperature , pressure and the firction coefficient by the function between temperature and friction coefficient.