Item: Preliminary results controlled shear experiments
Title: Preliminary results controlled shear experiments
Proceedings: Proceedings of the 1996 International Snow Science Workshop, Banff, Canada
Authors: Jurg Schweizer, Dept. of Civil Engineering, University of Calgary, 2500 University Dr. NW, Calgary AS T2N 1N4, Canada. fax: 1 4032827026, e-mail: email@example.com
Abstract: Snow samples (115 mm in diameter, 16-18 mm in height) were taken from the field and shortly afterwards tested in a cold laboratory using a direct simple shear apparatus of Norwegian manufacture. The effect of strain rate and temperature on snow strength, stiffness, and toughness were studied. The transitions from ductile to brittle behavior was found to be at a strain rate between 10-4 and 10-3 S-l for the snow types and temperatures tested. Stiffness up to peak stress proved to be highly temperature dependent. Toughness is also significantly temperature dependent, while snow strength seems to depend only slightly on temperature. The dependence of the shear strength on temperature seems partly hidden by the scatter in strength data due to variations inherent in sampling and testing.
Keywords: snow mechanics, snow strength, snow temperature, snow failure, fracture
Digital Abstract Not Available