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RESEARCH PAPERS: Offshore Mechanics and Arctic Engineering

A Preliminary Examination of the Effect of Structure on the Compressive Strength of Ice Samples From Multi-Year Pressure Ridges

[+] Author and Article Information
J. A. Richter, G. F. N. Cox

U.S. Army Cold Regions Research and Engineering Laboratory, Hanover, N.H. 03755

J. Energy Resour. Technol 107(1), 99-102 (Mar 01, 1985) (4 pages) doi:10.1115/1.3231170 History: Received November 01, 1983; Revised June 25, 1984; Online October 22, 2009

Abstract

A series of 222 uniaxial constant-strain-rate compression tests was performed on vertical multi-year pressure ridge sea ice samples. A preliminary analysis of the effect of structure on the compressive strength of the ice was performed on 78 of these tests. Test parameters included a temperature of −5°C (23°F) and strain rates of 10−5 and 10−3 s−1 . Columnar ice loaded parallel to the elongated crystal axes and perpendicular to the crystal c-axis was consistently the strongest type of ice. The strength of the columnar samples decreased significantly as the orientation of the elongated crystals approached the plane of maximum shear. Samples containing granular ice or a mixture of granular and columnar ice resulted in intermediate and low strength values. No clear relationship could be established between structure and strength for these ice types. However, in general, their strength decreased with an increase in porosity.

Copyright © 1985 by ASME
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