The friction coefficient of ice on ice is usually modeled as a constant. However, theory and experimental data show that ice-ice friction depends on the speed of sliding. In this paper we incorporate a rate-dependent friction coefficient into 2D discrete element method simulations of ice ensemble behaviour. Friction is high (0.7) at low sliding speeds (<10-6 ms-1), low (0.1) at high sliding speeds (>10-2 ms-1) and decreases log-linearly between these values. We show qualitatively and quantitatively how this affects the overall dynamics of a shear box experiment.
|Publication status||Published - Jun 2015|
|Event||Ports and Oceans Under Arctic Conditions (POAC) - Trondheim, Norway|
Duration: 14 Jun 2015 → 18 Jun 2015
|Conference||Ports and Oceans Under Arctic Conditions (POAC)|
|Period||14/06/15 → 18/06/15|