Ice Rubble Behavior in Punch Tests

Azarnejad, Azita; Brown, Thomas G.

doi:10.1061/(asce)0887-381x(2001)15:3(135)

Cited by 15 publications

(3 citation statements)

References 7 publications

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“…We uphold the Coulomb‐frictional limit on the contact interface:

false‖ σ_{t}^{i j} false‖ \leq μ false‖ σ_{n}^{i j} false‖,

and excess elastic energy is recorded as frictional heat loss. Increases in contact strength by freezing can be added to the right‐hand side of the above equation through a time and temperature‐dependent cohesion term (e.g., Azarnejad & Brown, 2001), but is not included here. The normal and tangential forces on the ice floes for the momentum equations (Equations and ) are found by decomposing the tangential stress according to the contact orientation:

f_{n}^{i j} = (σ_{t}^{i j} \cdot {\overset{false^}{bold-italicn}}^{i j}) A^{i j},

and

f_{t}^{i j} = (σ_{t}^{i j} \cdot {\overset{false^}{bold-italict}}^{i j}) A^{i j},

where

\overset{false^}{bold-italicn}

and

\overset{false^}{bold-italict}

are unit‐length normal and tangential vectors for the i and j particle pair.…”

Section: Ridging Parameterization For Large‐scale Simulationsmentioning

confidence: 99%

“…and excess elastic energy is recorded as frictional heat loss. Increases in contact strength by freezing can be added to the right-hand side of the above equation through a time and temperature-dependent cohesion term (e.g., Azarnejad & Brown, 2001), but is not included here. The normal and tangential forces on the ice floes for the momentum equations (Equations 1 and 2) are found by decomposing the tangential stress according to the contact orientation:…”

Section: Ridging Parameterization For Large-scale Simulationsmentioning

confidence: 99%

See 1 more Smart Citation

The Effects of Ice Floe‐Floe Interactions on Pressure Ridging in Sea Ice

Damsgaard

Sergienko

Adcroft

2021

J Adv Model Earth Syst

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show abstract

“…We uphold the Coulomb‐frictional limit on the contact interface:

false‖ σ_{t}^{i j} false‖ \leq μ false‖ σ_{n}^{i j} false‖,

f_{n}^{i j} = (σ_{t}^{i j} \cdot {\overset{false^}{bold-italicn}}^{i j}) A^{i j},

and

f_{t}^{i j} = (σ_{t}^{i j} \cdot {\overset{false^}{bold-italict}}^{i j}) A^{i j},

where

\overset{false^}{bold-italicn}

and

\overset{false^}{bold-italict}

are unit‐length normal and tangential vectors for the i and j particle pair.…”

Section: Ridging Parameterization For Large‐scale Simulationsmentioning

confidence: 99%

Section: Ridging Parameterization For Large-scale Simulationsmentioning

confidence: 99%

The Effects of Ice Floe‐Floe Interactions on Pressure Ridging in Sea Ice

Damsgaard

Sergienko

Adcroft

2021

J Adv Model Earth Syst

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show abstract

“…The initial tests performed in laboratories were direct shear box tests [7][8][9]. Subsequently, biaxial shear tests [10][11][12][13], triaxial shear tests [14,15] and punch-through tests [16][17][18] have been conducted. Based on laboratory tests, an elastic-perfectly plastic model based on the Mohr-Coulomb law was proposed to describe ice rubble behavior [19,20].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Ice Rubble with a Freeze-Bond Model in Dilated Polyhedral Discrete Element Method

Zhai¹,

Liu²,

Ji³

2022

Computer Modeling in Engineering &Amp; Sciences

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Freezing in ice rubble is a common phenomenon in cold regions, which can consolidate loose blocks and change their mechanical properties. To model the cohesive effect in frozen ice rubble, and to describe the fragmentation behavior with a large external forces exerted, a freeze-bond model based on the dilated polyhedral discrete element method (DEM) is proposed. Herein, imaginary bonding is initialized at the contact points to transmit forces and moments, and the initiation of the damage is detected using the hybrid fracture model. The model is validated through the qualitative agreement between the simulation results and the analytical solution of two bonding particles. To study the effect of freeze-bond on the floating ice rubble, punch-through tests were simulated on the ice rubble under freezing and nonfreezing conditions. The deformation and resistance of the ice rubble are investigated during indenter penetration. The influence of the internal friction coefficient on the strength of the ice rubble is determined. The results indicate that the proposed model can properly describe the consolidated ice rubble, and the freeze-bond effect is of great significance to the ice rubble properties.

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3D discrete numerical modelling of ridge keel punch through tests

Polojärvi¹,

Tuhkuri²

2009

Cold Regions Science and Technology

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Ice Rubble Behavior in Punch Tests

Cited by 15 publications

References 7 publications

The Effects of Ice Floe‐Floe Interactions on Pressure Ridging in Sea Ice

The Effects of Ice Floe‐Floe Interactions on Pressure Ridging in Sea Ice

Numerical Analysis of Ice Rubble with a Freeze-Bond Model in Dilated Polyhedral Discrete Element Method

3D discrete numerical modelling of ridge keel punch through tests

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