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

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 shelv...

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Bibliographic Details
Published in:Earth System Science Data
Main Authors: J. Christmann, R. Müller, K. G. Webber, D. Isaia, F. H. Schader, S. Kipfstuhl, J. Freitag, A. Humbert
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2015
Subjects:
Environmental sciences
GE1-350
Geology
QE1-996.5
Antarctic
Kohnen
Kohnen Station
Antarc*
ice core
Ice Shelves
Iceberg*
Online Access:https://doi.org/10.5194/essd-7-87-2015
https://doaj.org/article/20889c2ab8be4d9291803ea84ffff1d4
Description
Summary: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 .

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