Shear Test on Snow Explained by Fast Metamorphism
نویسندگان
چکیده
منابع مشابه
Snow metamorphism: A fractal approach.
Snow is a porous disordered medium consisting of air and three water phases: ice, vapor, and liquid. The ice phase consists of an assemblage of grains, ice matrix, initially arranged over a random load bearing skeleton. The quantitative relationship between density and morphological characteristics of different snow microstructures is still an open issue. In this work, a three-dimensional fract...
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Critical supersaturations have been measured for the vapor growth of ice crystals on both the basal and prism faces between 2168 and 20.48C. The values are low: approximately constant at 0.4% for the prism face, less for the basal face between 238 and 298C, but greater at higher and lower temperatures. The transitions between tabular (platelike) and columnar growth habits that occur near 238 an...
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Historically, dry-snow metamorphism has been classified by the thermal environment and thermodynamic processes in a snowpack. Snow experiencing predominantly macroscopic isothermal conditions develops different microstructure than snow subjected to large temperature gradients. As such, much previous research has been categorized by and limited to specific thermal conditions. The current researc...
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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 K(IIc). If crack surfaces touch under applied pressure, the fracture toughness in shear of snow (rho=247 kg m(-3)) is K(IIc)=680+/-60 Pa m(1/2). Screening of the stress intensity at the cra...
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ژورنال
عنوان ژورنال: Journal of Glaciology
سال: 1982
ISSN: 0022-1430,1727-5652
DOI: 10.1017/s0022143000011898