Accession Number : ADA017302

Title :   Effect of Porosity on the Hydrostatic Compression of Ice,

Corporate Author : COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s) : Gow,Anthony J. ; Sheehy,William

Report Date : OCT 1975

Pagination or Media Count : 13

Abstract : A cathetometer was used in conjunction with a window-equipped pressure chamber to measure linear deformation in porous polycrystalline ice samples compressed hydrostatically at pressures of up to 0.31 kb. Tests show that a porosity as little as 1% can increase the compressibility of ice four- or fivefold. However, the compression is of a substantially nonelastic nature, since very little recovery (expansion) occurs during and following pressure release. Pore closure, which is virtually complete at the higher pressures, can be attributed to a combination of plastic and cataclastic deformation of ice in the walls of the pores.

Descriptors :   *Ice, *Porosity, *Compression, Hydrostatic pressure, Ice islands, Plastic deformation, Antarctic Regions, Glaciers

Subject Categories : Snow, Ice and Permafrost

Distribution Statement : APPROVED FOR PUBLIC RELEASE