Indentation and splitting of freshwater ice floes

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Journal titleJournal of Offshore Mechanics and Arctic Engineering
Pages6369; # of pages: 7
AbstractSmall-scale indentation and floe-splitting experiments were conducted on columnar ice floes of various sizes and at different speeds. During low-speed indentation (0.2--8 mm s{sup {minus}1}), the ice floes always split apart, while at higher indentation speeds (> 100 mm s{sup {minus}1}) they did not. The reason is attributed to differences in the process of deformation and failure. At low speed, a large zone of microcracked ice forms in front of the indentor. Development of compressive stresses in the microcracked ice zone leads to buildup of transverse forces that drive crack propagation. These zones of microcracked ice are not observed during high-speed indentation. Rather, the ice fails by continuous crushing. The theoretical effective pressure required to split an ice floe, as predicted by Bhat (1988), agrees to some extent with those measured during experiments.
Publication date
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedYes
NRC number6441
NPARC number8895652
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Record identifier94a346d3-dcb5-467f-bff0-12a29ddc4247
Record created2009-04-22
Record modified2016-05-09
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