Interactive Resource icon  Shape of Cross Section to Avoid Torsion

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Description: An unique property of aluminium extrusions is the possibility to shape the cross section to fit the actual purpose. If the loading is eccentric on the beam, the extrusion technique makes it possible to shape the cross section in such a way that the loading will act through the shear centre. Then there will be no torsion and the beam will be more stable. In this example the cross section can be changed in order to make the shear centre to fall below the loading point thus avoiding torsion. Furthermore the stability due to lateral-torsional buckling can be improved by changing the width of parts of the flange.
Keywords: cross section • extrusion • shear centre • loading mode
Categories: Materials > Metals & alloys > Aluminium & alloys
Applications > Construction
Properties > Mechanical & thermal
Other topics > Design
Created by: MATTER, The University of Liverpool
Frans Soetens, TNO
Torsten Höglund, KTH Royal Institute of Technology, Stockholm
Contributions: Jürgen Hirsch, Hydro Aluminium Deutschland GmbH
Jan Rothe, Rio Tinto Alcan
Steinar Lundberg, Hydro Aluminium Structures, Karmoy
Marc Ryckeboer, Sapa
Published by: European Aluminium Association, Brussels
License: This resource is released under the Creative Commons Attribution Non-Commercial No Derivatives license (2.0 UK: England & Wales).
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Date created: 28 March 2009
Date added: 17 December 2009
Resource ID: 2571