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Evaluation of the criticality of cracks in ice shelves using finite element simulations

Plate, C. ; Müller, R. ; Humbert, A. ; Gross, D. (2012):
Evaluation of the criticality of cracks in ice shelves using finite element simulations.
In: The Cryosphere, 6 (5), pp. 973-984. Copernicus, ISSN 1994-0424,
DOI: 10.5194/tc-6-973-2012,
[Article]

Abstract

The ongoing disintegration of large ice shelf parts in Antarctica raise the need for a better understanding of the physical processes that trigger critical crack growth in ice shelves. Finite elements in combination with configurational forces facilitate the analysis of single surface fractures in ice under various boundary conditions and material parameters. The principles of linear elastic fracture mechanics are applied to show the strong influence of different depth dependent functions for the density and the Young's modulus on the stress intensity factor KI at the crack tip. Ice, for this purpose, is treated as an elastically compressible solid and the consequences of this choice in comparison to the predominant incompressible approaches are discussed. The computed stress intensity factors KI for dry and water filled cracks are compared to critical values KIc from measurements that can be found in literature.

Item Type: Article
Erschienen: 2012
Creators: Plate, C. ; Müller, R. ; Humbert, A. ; Gross, D.
Title: Evaluation of the criticality of cracks in ice shelves using finite element simulations
Language: English
Abstract:

The ongoing disintegration of large ice shelf parts in Antarctica raise the need for a better understanding of the physical processes that trigger critical crack growth in ice shelves. Finite elements in combination with configurational forces facilitate the analysis of single surface fractures in ice under various boundary conditions and material parameters. The principles of linear elastic fracture mechanics are applied to show the strong influence of different depth dependent functions for the density and the Young's modulus on the stress intensity factor KI at the crack tip. Ice, for this purpose, is treated as an elastically compressible solid and the consequences of this choice in comparison to the predominant incompressible approaches are discussed. The computed stress intensity factors KI for dry and water filled cracks are compared to critical values KIc from measurements that can be found in literature.

Journal or Publication Title: The Cryosphere
Journal Volume: 6
Issue Number: 5
Publisher: Copernicus
Divisions: 13 Department of Civil and Environmental Engineering Sciences
13 Department of Civil and Environmental Engineering Sciences > Mechanics
13 Department of Civil and Environmental Engineering Sciences > Mechanics > Continuum Mechanics
Date Deposited: 03 May 2022 11:15
DOI: 10.5194/tc-6-973-2012
URL / URN: https://tc.copernicus.org/articles/6/973/2012/
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