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Contributions to Proceedings:

F. G. Rammerstorfer, F.D. Fischer, T. Daxner, N. Friedl:
"On Instabilities Appearing during the Production of Plates and Shells";
in: "Proceedings of the 7th EUROMECH Solid Mechanics Conference", J.A.C. Ambrosio, M.P.T. Silva (ed.); Associção Portuguesa de Mecânica Teórica, Aplicada e Computacional, Lissabon, 2009, (invited), 7 - 12.



English abstract:
This General Lecture summarizes past and current work of the authors in the field of instabilities appearing during the production of plates and shells.
In engineering practice the term "structural instability" is usually related to buckling of structures subjected to loads during operation. In most cases this in an undesirable event leading to failure of the construction. There are some situations in which buckling is desired: for instance, snap-through buckling in switches of electronic devides or plastic buckling in energy absorbing elements such as crash elements in car bodies. Also these instabilities of equilibrium appear during operation of the structures.
However, structural instability phenomena may happen already during the production of engineering structures, even during the production of semi-finished material, e.g., during rolling of thin sheet metal.
Using analytical as well as computational methods, instability phenomena appearing during production processes are considered in the presentation exemplarily along typical production steps of thin walled metal structures. Starting with buckling and post-buckling of metal strips during rolling and leveling, instabilities during subsequent heat treatment of the strips as well as instabilities appearing during the forming process of tubes from strips are discussed. Finally we consider both structural as well as material instabilities appearing during flaring, i.e., the conical expansion of tubes.

Created from the Publication Database of the Vienna University of Technology.