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| Titel |
Evaluation of the criticality of cracks in ice shelves using finite element simulations |
| VerfasserIn |
C. Plate, R. Müller, A. Humbert, D. Gross |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1994-0416
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| Digitales Dokument |
URL |
| Erschienen |
In: The Cryosphere ; 6, no. 5 ; Nr. 6, no. 5 (2012-09-12), S.973-984 |
| Datensatznummer |
250003781
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| Publikation (Nr.) |
 copernicus.org/tc-6-973-2012.pdf |
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| Zusammenfassung |
| 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. |
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