Forming process of composite material and metal joint

Abstract

The invention discloses a forming process of composite material and a metal joint which can be used for a lightweight airplane traction rod structure. A connecting structure of the composite materialand the metal joint adopts a process method of manual laying and co-cementing molding of a curing oven; a physical embedding structure with a wavy section is adopted at the connecting area; and a unidirectional material is mainly laid in the design axial direction of the composite material laying layer, laying layers with + / -45 degrees direction and annular laying layers are laid at intervals, a trough position is filled with an annular fiber fabric in an area connected with the metal joint, the rigidity and strength of the connecting structure are guaranteed and improved, and finally a cylindrical appearance is formed in the connecting area. The forming process has the advantages of being simple and novel in structure, high in connection rigidity, good in structural stability, good in weight reduction effect and the like, and the forming process is particularly suitable for the design of high-rigidity composite materials and metal joints under tension and compression working conditions.

Description

technical field [0001] The invention relates to the field of composite material structures such as aerospace, in particular to a forming process for joints with metals. Background technique [0002] In the field of aerospace, the traditional connection methods between composite materials and metals are mostly glued, screwed, riveted, glue-screw or glue-rivet hybrid connections. Adhesive joints mostly adopt single and double lap joints, step-shaped or inclined-plane joints and other cross-sectional forms, but the structural reliability and load transmission capacity are lower than the latter two types of joints, while screw joints and riveting are prone to stress concentration and greatly increase the structural weight, so The efficient connection method between composite materials and metal joints has become an inevitable key research topic in product lightweight design. [0003] The Chinese patent number is CN201410103278.1, and the connection structure introduced in the p...

AI Technical Summary

Problems solved by technology

The connection structure described in this patent enables the carbon-carbon composite material to successfully achieve a high-reliability connection with metal parts, and can be repeatedly disassembled, which solves the problem of low reliability of the connection strength of the carbon-carbon composite surface equipment installation and cannot be repeated Difficult to assemble and disassemble; however, this type of joint will greatly increase the weight of the connection structure, and it will also cause stress concentrations around the screw holes of the composite parts

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