Phys. Rev. E 66, 027103 (2002) [3 pages]Fracture toughness of snow in shear under frictionReceived 24 April 2002; published 19 August 2002 The fracture toughness of snow in shear is one of the most relevant parameters when studying the mechanics of snow slab avalanche release. Double-cantilever snow beams were loaded asymmetrically to determine KIIc. If crack surfaces touch under applied pressure, the fracture toughness in shear of snow (ρ=247 kg m-3) is KIIc=680±60 Pa m1/2. Screening of the stress intensity at the crack tip occurs by Newtonian friction with k=1.3±0.47 along the crack faces. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.66.027103
DOI:
10.1103/PhysRevE.66.027103
PACS:
62.20.Mk, 45.70.Ht, 91.45.Vz, 92.40.Rm
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