![]() ![]() ![]() Further, the great variety of available core material types, ranging from balsa to foams to honeycombs, provides a broad spectrum of material densities, geometries, processing options, costs and physical attributes. In a sandwich construction - core material faced on each side with a reinforcing glass/resin skin offers greater mechanical strength and stiffness, pound-for-pound, than any other structural option, regardless of the materials used. ![]() In all its forms, it offers low density and, therefore, low mass, and does so at relatively low cost. In response, core manufacturers and kitters are working to develop new core materials that meet wind’s demand for strength, light weight and low cost. The expansion of this market - and the influence it exerts - is changing how core is made and applied in composites construction. The last five years, however, have seen explosive growth in wind turbine blade manufacturing, which promises to make unprecedented use of core in a variety of sandwich constructions. Foam, balsa and honeycomb core have been mainstays of sandwich construction in boat hulls and decks for more than three decades, and can be found in hundreds of parts used in construction, energy, infrastructure and transportation applications. The use of core material in composite applications is nothing new.
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