Abstract: A method of preparing a composite element for forming a composite assembly having a cavity is disclosed. The method includes laying a barrier layer on a surface of the composite element which defines at least part of the cavity. A support assembly including a mandrel (38) and a film bag (40) extending on the surface of the mandrel is positioned with the film bag against the barrier layer. A sealed enclosure containing the composite element is formed through sealing engagement with the film bag. The pressure within the sealed enclosure is reduced, and the mandrel is separated from the film bag while maintaining the film bag positioned against the barrier layer. In one embodiment, the element is a stringer and is positioned against a skin. An assembly for forming a composite member is also provided.

Abstract: A structural assembly comprising profile members imparting axial strength to the assembly. The profile members extend along a length. Ribbon holds the profile members together along their length. The ribbon imparts lateral strength to the assembly by being braced to the profile members. A method for manufacturing the structural assembly comprises winding the ribbon about a support structure to form a bracing lattice, positioning the profile members in a predetermined position on the support structure; and bonding the profile members to the bracing lattice to form a structural assembly.