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RESEARCH PAPERS

Mechanical Properties of Simulated Deep Permafrost

[+] Author and Article Information
M. A. Goodman

Exxon Production Research Co., Houston, Texas

J. Eng. Ind 97(2), 417-425 (May 01, 1975) (9 pages) doi:10.1115/1.3438601 History: Received June 27, 1974; Online July 15, 2010

Abstract

Creep tests were performed on frozen and unfrozen 20–40 mesh sand to evaluate the viscoelastic and yield properties of simulated deep permafrost. Overburden pressure associated with permafrost depth was imposed on samples by freezing under constant confining pressure and maintaining the pressure during the tests. The data showed that both thawed and frozen simulated permafrost behaved as a delayed elastic material before yield and as a coulomb plastic material after yield. The appropriate viscoelastic material constants were determined by correlating the test data with a mathematical model for the delayed elastic material. The results, together with Prudhoe Bay field test data, indicate that the creep response of deep permafrost, subject to loadings caused by thawing and refreezing, is negligible in comparison to the elastic and yield response.

Copyright © 1975 by ASME
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