Formation of cracks in ice plates by thermal shock

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Journal titleNature
Pages130131; # of pages: 2
Subjectcrystalline state; crackings (breaking); ice; thermal impact tests; fissuration; glace (gel); essai au choc thermique
AbstractThermal shock crack patterns were found to be almost entirely dependent on crystalllographic orientation. One crack pattern studied consisted of a system of equilateral triangles parallel to the crystalllographic "a" directions. This occurred in the case where the axis of hexagonal symmetry is perpendicular to the plate surface. When the symmetry axis lies in the plane of the plate surface the cracked segments are parallel to the sides of the rectangular etch pits. The boundary shape influences of the plate were minimal. Experiments were extended to multi- grained ice with the crystallographic orientation at various angles to the plate surface. Preference of cracking is parallel to planes containing "a" and "c" directions and is maintained for all grain sizes. Cracks often changed direction abruptly in passing from one grain to the next.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedNo
NRC number6511
NPARC number20358543
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Record identifier9fcd61c7-4228-45dd-8d43-e4383c481997
Record created2012-07-20
Record modified2016-05-09
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