Abstract
Minimum weight analysis of various forms of stiffened-plate construction considered for use as the compression covers of multicell wing box beams are presented. Longitudinal, transverse, and waffle-grid stiffening systems for flat plates were investigated by use of orthotropic plate theory and the assumption that the buckling modes occur simultaneously. After obtaining results for each stiffening configuration, the comparative structural efficiencies of the various types of plates were then considered in terms of common parameters.
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