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<div class="csl-entry">Schranz, C. (2005). <i>Conversion from imperfection-sensitive into imperfection-insensitive elastic structures</i> [Dissertation, Technische Universität Wien]. reposiTUm. https://resolver.obvsg.at/urn:nbn:at:at-ubtuw:1-9427</div>
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In case of loss of stability by means of symmetric bifurcation, a qualitative improvement of the postbuckling behavior of originally imperfection-sensitive elastic structures is their conversion into imperfection-insensitive structures by means of modifications of the original design.<br />The search for specific modes of stiffening that result in the aforementioned conversion is of fundamental as well as of practical importance.<br />Koiter's initial postbuckling analysis is applied in the framework of the FEM to deduce mathematical relations associated with the transition from imperfection sensitivity to insensitivity.<br />This mode of analysis primarily serves the purpose of deducing important theoretical results which facilitate the verification of specific numerical results.<br />Most of the structural analyses reported in this work are performed by means of the FEM, but without regard for Koiter's initial postbuckling analysis.<br />New mathematical conditions for symmetric bifurcation from nonlinear prebuckling paths are presented.<br />For the special case of linear prebuckling paths, these conditions are satisfied trivially.<br />The completeness of the set of solutions from Koiter's initial postbuckling analysis that involve the vanishing of a specific load parameter as a necessary (but not sufficient) condition for the conversion into imperfection insensitivity is demonstrated.<br />Attempts to achieve the aforementioned conversion include the increase of the thickness and of the stiffness of a spring attached to the structure, respectively, and the reduction of the rise of the undeformed structure.<br />The results of this investigation include different modes of conversion from imperfection-sensitive into imperfection-insensitive structures as well as failure to achieve such a conversion
de
dc.language
Deutsch
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dc.language.iso
de
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dc.rights.uri
http://rightsstatements.org/vocab/InC/1.0/
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dc.subject
Elastischer Werkstoff
de
dc.subject
Strukturmechanik
de
dc.subject
Nachbeulverhalten
de
dc.subject
Finite-Elemente-Methode
de
dc.title
Conversion from imperfection-sensitive into imperfection-insensitive elastic structures
de
dc.title.alternative
Umwandlung von Imperfektionssensitiven in Imperfektionsinsensitive elastische Strukturen
en
dc.type
Thesis
en
dc.type
Hochschulschrift
de
dc.rights.license
In Copyright
en
dc.rights.license
Urheberrechtsschutz
de
dc.contributor.affiliation
TU Wien, Österreich
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dc.rights.holder
Christian Schranz
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tuw.version
vor
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tuw.thesisinformation
Technische Universität Wien
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dc.contributor.assistant
Troger, Hans
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tuw.publication.orgunit
E202 - Institut für Mechanik der Werkstoffe und Strukturen
