Manufacturing techniques for composites with complex inner-ribbed grid closed-cavity structures

doi:10.19936/j.cnki.2096-8000.20251228.013

Abstract

Abstract: The satellite mounting plate of carbon fiber composite has a special internal rib grid structure. In order to solve the problem of difficulty in forming large-size closed-cavity structural parts using existing composite material forming process methods, this work designs a composite water-soluble core mold with flexible expansion skin-core characteristics, and proposes a process method for co-curing composite material internal rib grid closed-cavity structure based on the composite core mold, and verifies the rationality of the process strategy through typical part process tests. The preparation of the satellite mounting plate product was finally realized by using a laminate autoclave and thermal expansion process in conjunction with co-curing forming tooling. Compared with the traditional partition pre-pressing-secondary bonding forming process, the co-curing forming scheme proposed in this paper greatly reduces the manufacturing cost and process complexity, without fastener connection and secondary bonding, and the structural continuity, overall mechanical properties and inner cavity cleanliness of the satellite mounting plate are significantly improved. The product has passed the bending, flat pressing, vibration and thermal environment assessments.

Key words: satellite-carried structure, composite material, water soluble mandrel, internal reinforced grid structure, co-curing molding technology

CLC Number:

TB332

ZHANG Xuan, WANG Hao, ZHENG Liangang, ZHAI Dongkun, WANG Zixun, CHEN Yi. Manufacturing techniques for composites with complex inner-ribbed grid closed-cavity structures[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(12): 96-102.

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