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A Laboratory Study of Shock Waves in Frozen Soil

by Piyush Dutta, U.S. Army Cold Regions Research and, Engineering Lab, Hanover, United States,
Dennis Farrell, U.S. Army Cold Regions Research and, Engineering Lab, Hanover, United States,
John Kalafut, U.S. Army Cold Regions Research and, Engineering Lab, Hanover, United States,



Document Type: Proceeding Paper

Part of: Cold Regions Engineering

Abstract:

This work has focused on two aspects of dynamic behavior of frozen soil: first, on the shock pressure attenuation, and second, on the shock Hugoniot. The use of long bars of frozen soil mounted with a stress transfer cap mated to the Hopkinson pressure bar was investigated as a technique for shock attenuation studies. Hugoniot shock data were obtained from the high stress level impact on the specimens in the Hopkinson pressure bar(HPB) by applying the elementary theory of unidirectional stress propagation. Wave attenuation from low-level impact was exponential but the results are suspected to be influenced by wave dispersion and shear deformation effects. Hugoniot data were obtained over only a small deformation range, owing to the short (250-microsecond) wavelength developed by the HPB apparatus.

Subject Headings: Frozen soils | Wave pressure | Soil pressure | Wave attenuation | Stress waves | Shock waves | Shear waves

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