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Measurement of the fracture toughness of polycrystalline bubbly ice from an Antarctic ice core

Christmann, J. and Müller, R. and Webber, Kyle G. and Isaia, Daniel and Schader, Florian H. and Kipfstuhl, S. and Freitag, J. and Humbert, A. (2015):
Measurement of the fracture toughness of polycrystalline bubbly ice from an Antarctic ice core.
In: Earth System Science Data, Copernicus Publication, pp. 87-92, 7, [Article]

Abstract

Abstract. The critical fracture toughness is a material parameter describing the resistance of a cracked body to further crack extension. It is an important parameter for simulating and predicting the breakup behavior of ice shelves from the calving of single icebergs to the disintegration of entire ice shelves over a wide range of length scales. The fracture toughness values are calculated with equations that are derived from an elastic stress analysis. Additionally, an X-ray computer tomography (CT scanner) was used to identify the density as a function of depth. The critical fracture toughness of 91 Antarctic bubbly ice samples with densities between 840 and 870 kg m−3 has been determined by applying a four-point bending technique on single-edge v-notched beam samples. The examined ice core was drilled 70 m north of Kohnen Station, Dronnning Maud Land (75°00' S, 00°04' E; 2882 m). Supplementary data are available at doi:10.1594/PANGAEA.835321.

Item Type: Article
Erschienen: 2015
Creators: Christmann, J. and Müller, R. and Webber, Kyle G. and Isaia, Daniel and Schader, Florian H. and Kipfstuhl, S. and Freitag, J. and Humbert, A.
Title: Measurement of the fracture toughness of polycrystalline bubbly ice from an Antarctic ice core
Language: English
Abstract:

Abstract. The critical fracture toughness is a material parameter describing the resistance of a cracked body to further crack extension. It is an important parameter for simulating and predicting the breakup behavior of ice shelves from the calving of single icebergs to the disintegration of entire ice shelves over a wide range of length scales. The fracture toughness values are calculated with equations that are derived from an elastic stress analysis. Additionally, an X-ray computer tomography (CT scanner) was used to identify the density as a function of depth. The critical fracture toughness of 91 Antarctic bubbly ice samples with densities between 840 and 870 kg m−3 has been determined by applying a four-point bending technique on single-edge v-notched beam samples. The examined ice core was drilled 70 m north of Kohnen Station, Dronnning Maud Land (75°00' S, 00°04' E; 2882 m). Supplementary data are available at doi:10.1594/PANGAEA.835321.

Journal or Publication Title: Earth System Science Data
Volume: 7
Publisher: Copernicus Publication
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 11 Jan 2016 16:21
Identification Number: doi:10.1594/PANGAEA.835321.
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