Item: In-situ tensile strength measurements of alpine snow
Title: In-situ tensile strength measurements of alpine snow
Proceedings: 1988 International Snow Science Workshop, Whistler, October 12-15
Authors: J.B. Jamieson and C.D. Johnston
Abstract: During the winter of 1987-88, over 450 in-situ tests of tensile strength were made in the Alberta Rockies. An average of 7 tests was made for each of 66 snow layers. Snow with a faceted microstructure was half as strong as new, partly settled or rounded snow of the same density. The precision of 7 tests is 15% with 90% confidence. Notch sensitivity, rate effects and critical strain, are used to show that the test fractures were brittle. Measurements of tensile strength and slab thickness made at crown fractures support the hypothesis that stronger, thicker slabs results in wider crown fractures.
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Keywords: snow, layers, fractures, slab, tensile
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