Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/2742
Title: Visco-elastic properties of processed snow
Authors: Nakaya, Ukichirō, 1900-1962.
Keywords: Snow
Processed snow
Elasticity
Viscosity
Viscoelasticity
Snow compression
Snow compaction
Issue Date: Sep-1959
Publisher: U.S. Army Snow, Ice, and Permafrost Research Establishment.
Engineer Research and Development Center (U.S.)
Description: Research Report
Summary: The results of investigations at Site 2 (Greenland) on rectangular samples of Peter snow (2 x 20 x 1.0-1.6 cm) of varying ages are reported, and the methods of study are described. Young' s modulus was obtained from the frequency of resonance vibration and viscosity from the rate of damping, using a new viscoelastic meter. A simple relation was obtained between Young's modulus and density when the specimens were grouped according to structure, and the results of the experiments were analyzed for each of the groups, taking age as the parameter. Peter snow 2-3 yr old had almost the same modulus of elasticity as snow naturally compacted for 10 yr. The modulus of elasticity vs. density curve for new Peter snow was similar to that of naturally compacted snow, except that the absolute value of the modulus of elasticity was smaller for the same density. Young's modulus, however, increased with time, and the curve approached that of naturally compacted snow. When the grain-size distribution was heterogeneous, Young's modulus was larger than for naturally compacted snow of the same density. Mechanical vibration immediately after processing effected an increase in snow density, but did not accelerate age hardening.
URI: http://hdl.handle.net/11681/2742
Appears in Collections:Research Report

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