Item: An Experimental Study on the Mechanical Behavior of a Depth Hoar Layer Under Shear Stress (Preliminary Report)
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Title: An Experimental Study on the Mechanical Behavior of a Depth Hoar Layer Under Shear Stress (Preliminary Report)
Proceedings: Proceedings of the 1992 International Snow Science Workshop, Breckenridge, Colorado, USA
Authors:
- Takuya Fukuzawa [ Institute of Low Temperatue Science, Hokkaido University, Sapporo, 060, Japan ]
- Hideki Narita [ Institute of Low Temperatue Science, Hokkaido University, Sapporo, 060, Japan ]
Date: 1992
Abstract: Simple shear experiments were carried out to understand the mechanical behavior of a depth hoar layer at various shear strain rates of 10-5 S-l to 10-3 S-l at temperature of -6 °C. Ductile deformation took place in the layer at the shear strain rate lower than 8 x 10-5 s-l and typical brittle fracture took place at the shear strain rate higher than 2 x 10-4 S-l. The critical shear strain rate for the ductile-brittle transition was considered to be between these values. Shear strength increased with increasing shear strain rate within the ductile deformation region and took tile peak value at the critical shear strain rate for the ductile-brittle transition. Experimental result indicated that a natural slab avalanche does not occur in the absence of super-weak zone in the weak layer dealt in this study.
Object ID: issw-1992-171-175.pdf
Language of Article: English
Presenter(s): Unknown
Keywords: slab, shear strength, surface hoar, weak layer, fracture
Page Number(s): 171-175
Subjects: surface hoar layer shear strength slab avalanche
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