Instability of an Elastic Strip Hanging in an Airstream

[+] Author and Article Information
S. K. Datta, W. G. Gottenberg

Department of Mechanical Engineering, University of Colorado, Boulder, Colo.

J. Appl. Mech 42(1), 195-198 (Mar 01, 1975) (4 pages) doi:10.1115/1.3423515 History: Received August 01, 1974; Revised October 01, 1974; Online July 12, 2010


The stability of a long, thin elastic strip hanging vertically in a downward flowing airstream was considered. Experimentally it was observed that the strip remained essentially motionless or at most developed a small amplitude bounded oscillation as the air speed was increased until a critical speed was attained beyond which violent oscillations of the free-ended strip occurred. A linear approximate analysis was performed for this problem which accounted for shape-induced lift and bending stiffness of the strip and which closely predicted critical air speeds for this instability. The critical air speed was studied as a function of the length, width, and thickness of the rectangular strip.

Copyright © 1975 by ASME
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