Three-dimensional woven hollow structure preform based on digital guide template and forming method of preform

Abstract

The invention relates to a three-dimensional hollow structure preform and a forming method thereof, and can realize the integrated flexible weaving of the hollow structure preform. The hollow preformcomprises an upper panel, a middle connecting core and a lower panel; the preform can further be composed into a matrix, the matrix comprises a resin base, a metal base, a carbon-ceramic base and thelike; and after the composition of the matrix, a filling core is added to the hollow part, and an integrated hollow composite material can be obtained. According to the three-dimensional hollow structure preform, the upper panel, the connecting core and the lower panel are reinforced by three-dimensional structural fibers, and compared with a traditional hollow structure, the mechanical or adhesive connection is reduced, and the overall structural mechanical property is more excellent; the design is more flexible, shaped preform fibers may be one or more, fiber space structure of the preform may be one or more combinations, and the shaped hollow structure may be dot-matrix type, rib type, ring type, or a combination of several structures; and when used for weaving the integrated hollow structure preform, the method has the advantages of being simple in forming principle and flexible in design.

Description

technical field [0001] The invention belongs to the technical field of three-dimensional weaving of composite materials, and in particular relates to a three-dimensional weaving hollow structure preform and a forming method. Background technique [0002] Sandwich composite materials have the characteristics of high specific strength and specific modulus, good fatigue resistance and shock resistance, and can effectively absorb impact loads. noise integration etc. The traditional sandwich structure is generally manufactured by bonding the face plate and the core material, which leads to poor bonding ability of the bonded parts and limits the overall mechanical properties. [0003] Three-dimensional fabric forming technology uses methods such as weaving, weaving, and knitting to weave fibers into a three-dimensional shape to obtain a prefabricated body, which is then compounded with a matrix. The resulting composite material has excellent mechanical properties, is resistant to...

AI Technical Summary

Problems solved by technology

The traditional sandwich structure is generally manufactured by bonding the face plate and the core material, which leads to poor bonding ability of the bonded parts and limits the overall mechanical properties

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