Accession Number:

ADA017302

Title:

Effect of Porosity on the Hydrostatic Compression of Ice,

Descriptive Note:

Corporate Author:

COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER N H

Personal Author(s):

• Gow,Anthony J.
• Sheehy,William

Report Date:

1975-10-01

Pagination or Media Count:

13.0

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