Accelerated Insertion of Materials: Manufacturing and Producibility of Hat Stiffened Structure

摘要

HAT STIFFENED PANEL PROCESSING AND PAST CHALLENGES: * Hat side wall/cap ballooning where the sidewalls are not flat * Upper and lower radius thin-out (fiber movement and resin starvation) * Hat miss-location (hat to hat spacing) * Curved or snaking stiffener shape * Stiffener sink where the skin under the stiffener is of less thickness than blueprint * Other skin thickness variations between under the hat and adjacent to the hat (resin rich or resin poor areas) * Adhesive migration if adhesive is used in the fillet area. * Ply waviness around the radii * Fillet porosity (hat to skin intersection) * Skin out-of-plane waviness at the stiffener flange edges * Resin rich areas at the stiffener termination if a net molded stiffener is used * Trimming errors if the stiffener termination is trimmed after molding * The typical array of flat panel manufacturing defects including porosity and delaminations.