In many fields of lightweight design the use of structures consisting of composite materials is increasing steadily. When building a mechanical model of the real structure, e.g. a ship's hull or an aircraft's fuselage, the entire structure is often decomposed into substructures which can then be idealized using rods, beams, plates or shells.
In the framework of a cooperative doctoral dissertation, various analysis methods are being developed describing the linear and non-linear buckling behaviour of stiffened and unstiffened thin-walled structures.
The investigations include (but are not limited to) the linear and non-linear buckling behaviour of the following structural configurations:
The main objective in developing the analysis methods is high computational efficiency. Thus, variation methods in combination with shape functions with few degrees of freedom are applied to solve stability problems.
By inserting shape functions into the compatibility condition of in-plane strains, closed-form analytical solutions of the Airy stress functions are obtained. The equilibrium conditions are then used to deduce the load-displacement relationships by means of the Galerkin method. All remaining characteristics, such as in-plane displacements and stresses, are derived from kinematics and material law.
Contact
Prof. Dr.-Ing. Michael Seibel, michael.seibel@haw-hamburg.de, +49 [0]40-42875-7988
Dipl.-Ing. (FH) Matthias Beerhorst, matthias.beerhorst@haw-hamburg.de
Leadership
Hamburg University of Applied Sciences, Department of Automotive and Aeronautical Engineering
Partner
Technical University of Berlin