Method of fabricating fiber reinforced composite structure having stepped surface

摘要

Fiber reinforced composite structures having curved stepped surfaces are fabricated by laying up plies (38) of fiber reinforced material over a tool having a stepped tool feature. The plies (38) are rotated about a fixed axis as they are laid up to substantially form a fixed axis rosette pattern. The plies are angularly oriented such that at least certain of the plies have fiber orientations (52) other than 0, +45, -45 and 90 degrees. Potential bridging of the fibers over the stepped tool features is reduced or eliminated by cutting slits (42) in the plies in the area of the stepped features, so that the plies can be fully compacted.