Comptes Rendus
no. 7
Fracture of the winter sea ice cover on the Arctic ocean
[Fracture de la banquise en hiver]

Présenté par : Guy Laval

Erland M. Schulson1  ; William D. Hibler2
1 Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
2 International Arctic Research Center, University of Alaska, Fairbanks, AK 99775, USA
Comptes Rendus. Physique, Volume 5 (2004) no. 7, pp. 753-767.

On propose une interprétation du comportement fragile de la banquise (en hiver) en termes de compétition entre extension d'une fracture à partir de concentrateurs de contraintes, et relaxation de ces concentrations de contrainte par fluage. On identifie les zones de glissement intense qui s'entrelacent à la surface de la banquise comme étant des failles cisaillantes de Coulomb, et on modélise numériquement le développement de ces failles en termes de friction effective indépendante de l'échelle spatiale considérée.

We account for the brittle behavior of the winter sea ice cover in terms of the competition between creep relaxation and crack extension at stress concentrators; identify as Coulombic shear faults sliding lineaments that lace through the cover; and numerically model fault development in terms of scale-independent effective friction.

Publié le :
DOI : 10.1016/j.crhy.2004.06.001
Keywords: Winter sea ice cover, Creep relaxation, Crack extension, Coulombic shear faults
Mot clés : Banquise, Relaxation de ces concentrations de contrainte, Extension d'une fracture, Failles cisaillantes de Coulomb
Erland M. Schulson 1 ; William D. Hibler 2

1 Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA
2 International Arctic Research Center, University of Alaska, Fairbanks, AK 99775, USA 
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Erland M. Schulson; William D. Hibler. Fracture of the winter sea ice cover on the Arctic ocean. Comptes Rendus. Physique, Volume 5 (2004) no. 7, pp. 753-767. doi : 10.1016/j.crhy.2004.06.001. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2004.06.001/

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