Fracture Mechanical Analysis of Cracks in Ice Shelves using the Finite Element Method and Configurational Forces


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Angelika.Humbert [ at ] awi.de

Abstract

Ice shelves are important elements of the climate system and sensitive to climate changes. The disintegration of large Antarctic ice shelves is the focus of this fracture mechanical analysis. Ice is a complex material which, depending on the context, can be seen as a viscous fluid or as an elastic solid. A fracture event usually occurs on a rather short time scale, thus the elastic response is important and linear elastic fracture mechanics can be used. The investigation of the stress intensity factor as a measure of crack tip loading is based on a 2-dimensional analysis of a single crack with a mode-I type load and additional body loads. This investigation is performed using configurational forces. Depth dependent density and temperature profiles are considered. The relevant parameters are obtained by literature, remote sensing data analysis and modeling of the ice dynamics. The criticality of wet surface cracks is investigated.



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Published
Eprint ID
45859
DOI 10.1002/pamm.201110076

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Plate, C. , Müller, R. , Gross, D. and Humbert, A. (2011): Fracture Mechanical Analysis of Cracks in Ice Shelves using the Finite Element Method and Configurational Forces , Proceedings in Applied Mathematics and Mechanics, 11 (1), pp. 169-170 . doi: 10.1002/pamm.201110076


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