Postbuckling and imperfection sensitivity of fixed-end and free-end struts on elastic foundation |
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Authors: | B-S Wu H-X Zhong |
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Affiliation: | (1) Mechanics Section, Department of Mathematics, Jilin University, Changchun 130023, P. R. China, CN;(2) Department of Computer Science, Jilin University, Changchun 130023, P. R. China, CN |
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Abstract: | Summary A study of the postbuckling and imperfection sensitivity of fixed-end and free-end struts on a Winkler elastic foundation
is carried out. The configuration and stability of the postbuckling paths bifurcating from the critical points are analysed.
For the most part of foundation stiffness, the corresponding postbuckling paths are shown to be falling with respect to load
and be unstable. This indicates that, for almost all values of foundation stiffness, the buckling loads of the struts will
be sensitive to imperfections. We also obtain imperfection sensitivity of the struts with respect to geometric imperfections
having the shape of buckling modes.
Received 30 October 1998, accepted for publication 30 March 1999 |
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Keywords: | Strut elastic foundation path bifurcation postbuckling imperfection sensitivity |
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