2D DEM of ice rubble:the effect of rate-dependent friction
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 be...
| Main Authors: | , |
|---|---|
| Format: | Conference Object |
| Language: | English |
| Published: |
2015
|
| Subjects: | |
| Online Access: | https://researchportal.port.ac.uk/portal/en/publications/2d-dem-of-ice-rubble(3d79dce4-ee80-4ec3-ad7f-ba749999485b).html https://researchportal.port.ac.uk/ws/files/2998172/Lishman_Polojarvi_Poac_Final_Submission.pdf |
| Summary: | 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. |
|---|