A case study validated this fact.Īt present, applications of new advanced materials and constructions, as well as innovative and environmentally friendly technologies, are needed both in the manufacturing and transport sectors to increase companies’ competitiveness and provide sustainability. The main contribution is developing a new method for optimizing a totally FRP composite sandwich structure-due to its material constituents and construction-that is more advantageous than traditional helicopter floors. The Digimat-HC software solved the numerical models for the optimum sandwich plates of helicopter floors. The single-objective weight optimization was solved by applying the Interior Point Algorithm of the Matlab software, the Generalized Reduced Gradient (GRG) Nonlinear Algorithm of the Excel Solver software, and the Laminator software. During the optimization, nine design constraints were considered: deflection face sheet stress (bending load, end loading) stiffness buckling core shear stress skin wrinkling intracell buckling and shear crimping. The face sheets were composed of a different number of layers with cross-ply, angle-ply, and multidirectional fiber orientations. During the optimization, 46 different layer combinations of 4 different FRP layers (woven glass fibers with phenolic resin woven glass fibers with epoxy resin woven carbon fibers with epoxy resin hybrid composite) and FRP honeycomb core structural elements were investigated. The goal of this research was to elaborate a new optimization method for a totally FRP composite construction for helicopter floors. The application of fiber-reinforced plastic (FRP) composites as structural elements of air vehicles provides weight saving, which results in a reduction in fuel consumption, fuel cost, and air pollution, and a higher speed.
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