Failure characteristics of alpine snow in slow deformation

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ConferenceProceedings, International Symposium on the Mechanical Behaviour of Structured Media: 18 May 1981, Ottawa, Ontario, Canada
Pages409418; # of pages: 10
Subjectsnow (snowfall); breaking tests; strain; compression; essai de rupture; deformation; compression
AbstractSeasonal snow in mountains is a bonded granular material for which failure depends on deformation rate and strain conditions. Failure characteristics of slowly deformed alpine snow are interpreted in terms of the following two mechanisms: (1) micro-fracturing of bonds that can produce loss of stiffness, a peak on the deformation curve and subsequent strain-softening; and (2) plastic slip and associated effects such as compaction, regelation, and bond formation (healing) that produce strain-hardening. Data indicate that alpine snow displays a strong tendency for plastic slip and hardening effects when compressive deformation is present. It appears that some aspects of rate effects are understandable in terms of competition between micro-fracturing and plastic slip and healing effects in simple shear experiments, for example. Dry snow slab release is discussed as a possible application of these concepts.
Publication date
AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number19675
NPARC number20331191
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Record identifier50528f1d-b8f5-4b46-afc8-5f41404a5026
Record created2012-07-18
Record modified2016-05-09
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