An estimate of the size of the damage zone beneath an indenter on ice

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DOIResolve DOI: http://doi.org/10.1016/0165-232X(93)90013-X
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TypeArticle
Journal titleCold Regions Science and Technology
Volume21
Issue4
Pages371380; # of pages: 10
Subjectindenter; damage zone
AbstractA Vickers indenter loaded with a range of loads from 88 to 1189 N was used on fine grained columnar freshwater ice at -15°C. The length of the resulting cracks, contact diagonal, and the size of the smallest crushed pieces were recorded. The size of the microcrack damaged zone was estimated using these experimental results and a previously obtained arrest stress intensity factor of ice. The microcracked damaged zone is shown to be much smaller than a plastically damaged zone. The range of the lower limit to the piece size was consistent with calculated values. This is taken as evidence that an inelastic energy absorption mechanism other than pressure melting may be activated. Plasticity in the microcrack damaged zone is activated only in very small fragments. The extensive microcracking is the reason for the much smaller damage zone. This mechanism of plastic flow in only small fragments may be involved in the scale dependence of fragmentation processes indicated by a non-constant fractal ice capacity dimension.
Publication date
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedYes
IdentifierIR-1993-31
NRC number5216
NPARC number8895519
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Record identifiere9395be3-ddc2-474a-827c-5c0d85339b7c
Record created2009-04-22
Record modified2016-05-09
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