Strojnicky Casopis 50, 241-252, 1999
L.J. Martikainen¹ and F.G. Rammerstorfer²
¹Laboratory of Technical and Applied Mechanics, HUT,
²Institute of Lightweight Structures and Aerospace Engineering, TU Wien, Vienna, Austria
Thin-faced sandwich panels with a soft core are sensitive to failure under
Support reactions of continuous panels can easily cause local failures, such
as buckling of the faces or crushing of the core, at intermediate supports.
These failures result in inelastic deformations in the core and, further,
in the reduced stiffness and load-carrying capacity of the sandwich panel.
This paper studies the Finite Element modelling of local failures.
The core of the panel is modelled by continuum elements and the faces by
The continuum model for the core enables the use of an elastic-plastic material
model, called the crushable foam model, to take the hydrostatic pressure
dependent yield of the core material into account.
Three-point bending tests on panels with steel faces and a core made of
polystyrene foam or structural rock wool could be satisfactorily simulated