Sandwich Construction 5 (Eds. H.R.Meyer-Piening, D.Zenkert), pp. 291-300, 2000
W.K. Vonach, T. Daxner and F.G. Rammerstorfer
Institute of Lightweight Structures and Aerospace
TU Wien, Vienna, Austria
In-situ sandwiches bear the potential of representing functionally graded
materials in analogy to natural structures such as cortical/spongy bone
which appear to be optimized with respect to hight specific stiffness.
The paper deals with the optimization of the distribution of a given mass
of aluminium in a sandwich structure in the form of face layers and a foam
core, in order to achieve the highest possible stiffness.
Three different configurations are considered: one with a mesoscopically
homogeneous foam core, one in which the density distribution throughout the
core thickness is a quadratical function, and one where the functionally
graded foam has varying density in thickness and span direction.