Research Article
Dec 1967
Some Thoughts on the Southwell Plot
Author: John RoordaAuthor Affiliations
Publication: Journal of the Engineering Mechanics Division
Volume 93, Issue 6
Abstract
Since its inception for column buckling problems, the Southwell method has also been used to determine the critical load in frame and plate buckling experiments. Although its use in these cases has been justified in the context of small deflection theory, little is known about the effect that nonlinearities in such structures have upon the Southwell line. The Southwell Plot is examined in relation to the initial post-buckling behavior of the structure. It is found that, depending on the nature of the post-buckling behavior, the Southwell method may under-estimate or overestimate the critical load. Consequently, a knowledge of the post-buckling behavior is essential in the correct interpretation of a Southwell plot. Some experimental results are included.
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Published In
Journal of the Engineering Mechanics Division
Volume 93 • Issue 6 • December 1967
Pages: 37 - 48
Copyright
© 1967 American Society of Civil Engineers.
History
Published in print: Dec 1967
Published online: Feb 3, 2021
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Authors
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John Roorda
Asst. Prof., Dept. of Civ. Engrg., Univ. of Waterloo, Waterloo, Canada.
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.