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 Engineering,
TU Wien, Vienna, Austria

Abstract - 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.