Sandwich Construction 3 Vol.I (Ed. H.G.Allen), pp. 325-334, 1996
M.A. Stiftinger¹, F.G. Rammerstorfer¹ and A. Starlinger²
¹Institute of Lightweight Structures and Aerospace
TU Wien, Vienna, Austria
²AIREX AG, Sins, Switzerland
Starlinger and Rammerstorfer presented a semi-analytical-numerical
approach for the calculation of
face layer membrane stress states which are critical with respect to wrinkling
of the face layers of sandwiches at short wavelengths.
The implementation of this approach into special
nonlinear finite shell elements allows the consideration of these local
effects in the computation of the behavior of sandwich structures.
This procedure can be used for isotropic face layers on isotropic or
In the present work the extension of the approach to orthotropic face layers on anisotropic cores is described. The analytical derivations are presented and numerical results using a finite element discretization show the effectiveness of the presented approach.