Static Determinacy in the Theory of Finite Width Foil Bearings

[+] Author and Article Information
W. E. Langlois

IBM Research Laboratory, San Jose, Calif.

J. Appl. Mech 41(1), 51-54 (Mar 01, 1974) (4 pages) doi:10.1115/1.3423270 History: Received November 01, 1972; Revised February 01, 1973; Online July 12, 2010


The assumption of “perfect flexibility” is shown to be self-consistent in an important class of finite-width foil bearing problems. When the membrane equations are written in the “stretched coordinates” of foil bearing theory, the usual edge conditions on the tape result in a statically determinate problem. The tape dynamics couples to the Reynolds lubrication equation through a single force-balance equation which does not entail the elastic strain.

Copyright © 1974 by ASME
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