Item: Improvements by measuring shear strength of weak layers
Title: Improvements by measuring shear strength of weak layers
Proceedings: Proceedings of the 1996 International Snow Science Workshop, Banff, Canada
Authors: Paul Fohn and Christian Camponovo, Swiss Federal Institute for Snow and Avalanche Research, 7260 Weissfluhjoch, Davos, Switzerland, E-mail: firstname.lastname@example.orgemail@example.com
Abstract: Concurrent measurements in situ of the shear strength and strain rate of weak layers or interfaces have not been executed up to now. In order to uncover the relationship between the two parameters and to clarify if the usual loading times (0.1 to 3 seconds) were adequate to produce brittle fractures parallel acceleration and deformation measurements were performed. Both additional measurements show that the critical strain rate limit for brittle fractures is always exceeded, thus the dynamic loading of a moving skier is well reproduced by such shear frame measurements. The measuring procedures, the environmental conditions and the measured shear strength values are presented as well as some error sources. Finally the practical consequences of such measurements are displayed by some thereof calculated relationships between strength, stress and stability.
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Keywords: snow slab, weak layers, strain rate, shear strength, measuring procedures
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