An improvement of Southwell's method for determining buckling loads
Abstract
If an elastic bar with some initial imperfection is subjected to increasing compressive axial load, the lateral deflection, measured anywhere along its length, increases monotonically; the primary buckling mode becoming more and more dominant in the deflected shape. A classical approximate technique, due to R.V. Southwell, correlates axial load and lateral deflection for determination of the primary buckling load of the bar. However, Southwell's approximation may be inaccurate is the primary mode does not predominate in the deflected shape. The present thesis proposes a technique which employs axial loading, but also transverse loading to insure dominance of the primary mode in the deflected shape. The technique allows experimental determination of the second buckling load, again using appropriate transverse loads to insure dominance of that mode in the deflected shape.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
Related items
Showing items related by title, author, creator and subject.
-
The mechanism of radial compressor instability
Winner, Crawford Douglas (Troy, New York; Rensselaer Polytechnic Institute, 1951-05);The limit imposed on the operating range of a radial flow compressor by surging or pulsations in the reduced flow region has long been a source of concern to design engineers who would like to use this otherwise simple, ... -
Study of variation in flow through Strait of Gibraltar.
Sears, Johnny Marion (Monterey, California. Naval Postgraduate School, 1968-06);Averaged oceanographic station data are used to describe the seasonal variation of salinity and temperature in the Strait of Gibraltar area. Seasonal sections of salinity suggest that winter is the season of maximum outflow ... -
Quasi-hybrid airships
Layton, D.M. (AIAA, 1981-07);The dynamic lift required for operating even a conventionally shaped non rigid airship with a weight in excess of the static buoyancy may be obtained by operating in a quasi-hybrid mode wherein the deflected longitudinal ...