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Effect of Porosity on the Hydrostatic Compression of Ice,
COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H
Pagination or Media Count:
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.
APPROVED FOR PUBLIC RELEASE