2D DEM of ice rubble: the effect of rate-dependent friction

Ben Lishman; Attu Polojärvi

2D DEM of ice rubble: the effect of rate-dependent friction

Ben Lishman, Attu Polojärvi

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Abstract

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.

Original language	English
Pages	1-8
Publication status	Published - Jun 2015
Event	Ports and Oceans Under Arctic Conditions (POAC) - Trondheim, Norway Duration: 14 Jun 2015 → 18 Jun 2015

Conference

Conference	Ports and Oceans Under Arctic Conditions (POAC)
Country/Territory	Norway
City	Trondheim
Period	14/06/15 → 18/06/15

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Lishman_Polojarvi_Poac_2015 Friction in DEMsAccepted author manuscript (Post-print), 0.99 MBLicence: CC BY

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title = "2D DEM of ice rubble: the effect of rate-dependent friction",

abstract = "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.",

author = "Ben Lishman and Attu Poloj{\"a}rvi",

year = "2015",

month = jun,

language = "English",

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T2 - Ports and Oceans Under Arctic Conditions (POAC)

AU - Lishman, Ben

AU - Polojärvi, Attu

PY - 2015/6

Y1 - 2015/6

N2 - 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.

AB - 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.

M3 - Paper

SP - 1

EP - 8

Y2 - 14 June 2015 through 18 June 2015

ER -

2D DEM of ice rubble: the effect of rate-dependent friction

Abstract

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