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Elastic Bifurcation, Postbuckling Behavior, and Collapse of Thin-Walled Regular Polygonal Columns
https://orcid.org/0000-0002-9801-1220
https://orcid.org/0000-0002-7994-2687
This paper summarizes recent findings concerning the elastic bifurcation and postbuckling behaviors of thin-walled regular convex polygonal tubes subjected to uniform compression. Such cross sections exhibit rotational symmetry, a feature that is at the root of several behavioral peculiarities, which are demonstrated using a specialization of Generalized Beam Theory (GBT). In particular, it is shown that (1) duplicate bifurcation loads can occur both in linear stability analyses and postbuckling analyses; (2) local or distortional buckling can be critical, depending on the cross-section geometry; (3) the pure local postbuckling behavior is very similar to that of simply supported plates under uniaxial compression; (4) the pure distortional postbuckling behavior has no postcritical strength and is imperfection-sensitive; and (5) the unstable nature of distortional buckling generates an unstable local-distortional interaction even if the distortional critical load is well above the local one. For comparison and validation purposes, results obtained with finite strips and shell finite-element models are reported.
Elastic Bifurcation, Postbuckling Behavior, and Collapse of Thin-Walled Regular Polygonal Columns
https://orcid.org/0000-0002-9801-1220
https://orcid.org/0000-0002-7994-2687
This paper summarizes recent findings concerning the elastic bifurcation and postbuckling behaviors of thin-walled regular convex polygonal tubes subjected to uniform compression. Such cross sections exhibit rotational symmetry, a feature that is at the root of several behavioral peculiarities, which are demonstrated using a specialization of Generalized Beam Theory (GBT). In particular, it is shown that (1) duplicate bifurcation loads can occur both in linear stability analyses and postbuckling analyses; (2) local or distortional buckling can be critical, depending on the cross-section geometry; (3) the pure local postbuckling behavior is very similar to that of simply supported plates under uniaxial compression; (4) the pure distortional postbuckling behavior has no postcritical strength and is imperfection-sensitive; and (5) the unstable nature of distortional buckling generates an unstable local-distortional interaction even if the distortional critical load is well above the local one. For comparison and validation purposes, results obtained with finite strips and shell finite-element models are reported.
Elastic Bifurcation, Postbuckling Behavior, and Collapse of Thin-Walled Regular Polygonal Columns
https://orcid.org/0000-0002-9801-1220
https://orcid.org/0000-0002-7994-2687
This paper summarizes recent findings concerning the elastic bifurcation and postbuckling behaviors of thin-walled regular convex polygonal tubes subjected to uniform compression. Such cross sections exhibit rotational symmetry, a feature that is at the root of several behavioral peculiarities, which are demonstrated using a specialization of Generalized Beam Theory (GBT). In particular, it is shown that (1) duplicate bifurcation loads can occur both in linear stability analyses and postbuckling analyses; (2) local or distortional buckling can be critical, depending on the cross-section geometry; (3) the pure local postbuckling behavior is very similar to that of simply supported plates under uniaxial compression; (4) the pure distortional postbuckling behavior has no postcritical strength and is imperfection-sensitive; and (5) the unstable nature of distortional buckling generates an unstable local-distortional interaction even if the distortional critical load is well above the local one. For comparison and validation purposes, results obtained with finite strips and shell finite-element models are reported.
Elastic Bifurcation, Postbuckling Behavior, and Collapse of Thin-Walled Regular Polygonal Columns
J. Eng. Mech.
Gonçalves, Rodrigo (Autor:in) / Martins, André Dias (Autor:in) / Camotim, Dinar (Autor:in)
01.01.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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