High-speed video analysis of fracture propagation in a thick edge-loaded freshwater ice sheet

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DOIResolve DOI: http://doi.org/10.1139/P02-134
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TypeArticle
Journal titleCanadian Journal of Physics
Volume81
Issue1-2
Pages261269; # of pages: 9
AbstractHigh-speed video (1000 frames/s) was used to record the propagation of fractures in a 1.7 m thick freshwater ice sheet in Tuktoyaktuk Harbor, N.W.T. The fractures were induced by an indentor operating in a 0.33 m deep trench in the ice where it pushed against the upper 0.2 m edge of the sheet. Most fractures were planar horizontal shear cracks. Some vertically-oriented horizontally-propagating fractures were also observed. Pre-existing cracks in the ice had a considerable effect on the shape and propagation characteristics of the induced cracks. The fractures propagated intermittently, where the average velocity as a fracture progressed through several jump episodes was low (in the 0?50 m/s range), whereas the velocity measured at the brief jumps was in the 0?550 m/s range.
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AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedYes
IdentifierIR-2003-16
NRC number5986
NPARC number8895540
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Record identifier5368bb97-92d7-4167-a4c9-f900793a5f30
Record created2009-04-22
Record modified2016-05-09
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