Measurements of dense snow avalanche basal shear to normal stress ratios (S/N)

Details Measurements of dense snow avalanche basal shear to normal stress ratios (S/N) Measurements of dense snow avalanche basal shear to normal stress ratios (S/N)

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3407501p&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 7, CiteID L07501

Physics

3

Cryosphere: Avalanches, Cryosphere: Snow (1827, 1863), Cryosphere: Instruments And Techniques, Cryosphere: Engineering

Scientific paper

We investigate frictional processes at the basal shear layer of snow flows. A chute is instrumented with basal force plates, velocity and flow height sensors to perform experiments with dry and wet snow. We find that a Mohr-Coulomb relation of the form S = c + bN accurately describes the relation between normal (N) and shear stress (S). The Coulomb friction coefficient b ranges between 0.22 and 0.55. Several wet snow avalanches exhibited significant cohesion c ~ 500 Pa. These quantitative measurements of stress, velocity and flow height allow us to probe the relation between basal work, internal dissipation and gravitational potential energy. We find that basal shearing is the primary frictional mechanism retarding snow flows. This mechanism shows no velocity dependence, contrary to many postulated constitutive relations for basal shearing in snow avalanches.

Affiliated with

Also associated with

No associations

Rating

Measurements of dense snow avalanche basal shear to normal stress ratios (S/N) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Measurements of dense snow avalanche basal shear to normal stress ratios (S/N), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurements of dense snow avalanche basal shear to normal stress ratios (S/N) will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1080654