Journal cover Journal topic
Earth System Science Data The Data Publishing Journal
Earth Syst. Sci. Data, 7, 87-92, 2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
11 May 2015
Measurement of the fracture toughness of polycrystalline bubbly ice from an Antarctic ice core
J. Christmann1, R. Müller1, K. G. Webber2, D. Isaia2, F. H. Schader2, S. Kipfstuhl3, J. Freitag3, and A. Humbert3 1Institute of Applied Mechanics, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
2Institute of Materials Science, Technische Universität Darmstadt, 64287 Darmstadt, Germany
3Glaciology section, Alfred-Wegener-Institut, Helmholtz Zentrum für Polar- und Meeresforschung, 27570 Bremerhaven, Germany
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.

Citation: Christmann, J., Müller, R., Webber, K. G., Isaia, D., Schader, F. H., Kipfstuhl, S., Freitag, J., and Humbert, A.: Measurement of the fracture toughness of polycrystalline bubbly ice from an Antarctic ice core, Earth Syst. Sci. Data, 7, 87-92,, 2015.