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RESEARCH PAPERS

Elastic and Viscoelastic Foundation Models

[+] Author and Article Information
Arnold D. Kerr

Department of Aeronautics and Astronautics, New York University, New York, N. Y.; Cold Regions Research and Engineering Laboratory (CRREL), U. S. Army

J. Appl. Mech 31(3), 491-498 (Sep 01, 1964) (8 pages) doi:10.1115/1.3629667 History: Received March 20, 1963; Revised September 19, 1963; Online September 15, 2011

Abstract

The present paper contains a critical study of a number of foundation models as well as a further development of some of the ideas involved. Among others it is shown that the Pasternak foundation is a mechanical model for the so-called “generalized” foundation. It is also demonstrated that the kernel for the Pasternak foundation in plane stress or plane strain is identical with Wieghardt’s exponential kernel, and that for the three-dimensional case the kernel is a modified Bessel function. It is also shown that the “non solvability” of the problem of a finite beam or plate resting on a continuous foundation as posed by Wieghardt and further elaborated by Pflanz is not correct, and that problems of this type are solvable for any load distribution permissible in classical plate theory. Throughout the paper, emphasis is placed on the proper mathematical formulation of the physical problems in question.

Copyright © 1964 by ASME
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