Testing and Analysis of Downscaled Composite Wing Box

The fabrication, bending test, and analysis of a downscaled composite wing box were presented. Before the fabrication of the downscaled composite wing box, an I-stiffened composite plate, which was made by the same layup method as the skin of the wing box, was tested and analyzed. The graphite/epoxy wing box consisted of two cocured parts. One part had a lower skin and two I stiffeners. The other part had an upper skin, two I stiffeners, and two spars. The mold forthecocuring ofthecompositewing box and bending testmachine of the wing box were