Mixed core material splicing and stabilizing method for composite sandwich structure

• Main Authors: LI ZIYUAN, XU SISI, TONG SHUHUI, DAI DONGMEI, ZHAO XUEYING, HAO GANGNING, WANG ZHIGANG
• Format: Patent
• Language: Chinese; English
• Published: 30.04.2024
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention provides a hybrid core material splicing and stabilizing method for a composite sandwich structure. The method comprises the following steps: 1) processing foam and honeycombs; 2) drying; 3) paving a layer of polystyrene foam on the periphery of the honeycomb; 4) embedding the honeycomb with the polystyrene foam into the foam frame to form a mixed core material; 5) laying the adhesive film and the carbon fiber prepreg on the forming tool; (6) laying a mixed core material; (7) laying an adhesive film and a carbon fiber prepreg; (8) laying an isolating membrane, and placing a pressure equalizing plate in an abutted seam area of the upper surfaces of the honeycomb and the foam; (9) a forming tool edging assembly is installed on the periphery of the foam frame for foam protection; and 10) pasting a vacuum bag and curing. Splicing and stabilization of the mixed core materials are achieved, the quality stability is good, and the lateral pressure resistance of the core materials is greatly improved thr