Effect of compressive loading on first-year sea-ice permeability

Renshaw, Carl E.; Marchenko, Aleksey; Schulson, E. M.; Karulin, Evgeny

doi:10.1017/jog.2018.32

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…The values of ECTE were found to be about −10 −4 K −1 . Recent in situ investigations of the influence of ice compression on ice permeability performed on sea ice near the coal quay demonstrated strong reduction of the permeability in compressed ice [ 33 ]. Based on this study the origin of high ice pressures on JSR during low tide can be explained as follows.…”

Section: Discussionmentioning

confidence: 99%

Thermo-mechanical loads of confined sea ice on structures

Marchenko¹

2018

Phil. Trans. R. Soc. A.

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Records of the ice pressures on the joggle skirt of the coal quay in Spitsbergen were performed over winter seasons in 2013 and 2015. The ice thickness below the quay was above 2 m. Ice temperature over the ice thickness and water pressure at the sea bed were measured synchronously. It was discovered that sea water migrates through the ice confined inside the joggle skirt under the influence of tidal changes of the water pressure below the ice. It leads to the formation of floods on the ice surface during high tide. The ice surface becomes dry during low tide. Ice temperature and ice pressure on the joggle skirt are changed according to the semidiurnal cycle. Spectral analysis and correlation analysis are performed to analyse the loads caused by thermal expansion of the ice. A thermo-mechanical model of ice based on elastic-plastic rheology with thermal effect is used in numerical simulations of the observed phenomena. Numerical simulations are performed with finite element software.This article is part of the theme issue ‘Modelling of sea-ice phenomena’.

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Section: Discussionmentioning

confidence: 99%

Thermo-mechanical loads of confined sea ice on structures

Marchenko¹

2018

Phil. Trans. R. Soc. A.

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Fracture, Friction, and Permeability of Ice

Schulson

Renshaw

2022

Annu. Rev. Earth Planet. Sci.

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Water ice Ih exhibits brittle behavior when rapidly loaded. Under tension, it fails via crack nucleation and propagation. Compressive failure is more complicated. Under low confinement, cracks slide and interact to form a frictional (Coulombic) fault. Under high confinement, frictional sliding is suppressed and adiabatic heating through crystallographic slip leads to the formation of a plastic fault. The coefficient of static friction increases with time under load, owing to creep of asperities in contact. The coefficient of kinetic (dynamic) friction, set by the ratio of asperity shear strength to hardness, increases with velocity at lower speeds and decreases at higher speeds as contacts melt through frictional heating. Microcracks, upon reaching a critical number density (which near the ductile-to-brittle transition is nearly constant above a certain strain rate), form a pathway for percolation. Additional work is needed on the effects of porosity and crack healing. ▪ An understanding of brittle failure is essential to better predict the integrity of the Arctic and Antarctic sea ice covers and the tectonic evolution of the icy crusts of Enceladus, Europa, and other extraterrestrial satellites. ▪ Fundamental to the brittle failure of ice is the initiation and propagation of microcracks, frictional sliding across crack faces, and localization of strain through both crack interaction and adiabatic heating.

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Effect of compressive loading on first-year sea-ice permeability

Cited by 2 publications

References 27 publications

Thermo-mechanical loads of confined sea ice on structures

Thermo-mechanical loads of confined sea ice on structures

Fracture, Friction, and Permeability of Ice

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