Tension-compression bearing carbon fiber composite material winding joint and preparation method thereof

Abstract

The invention discloses a tension-compression bearing carbon fiber composite material winding joint and a preparation method thereof and belongs to the technical field of joint materials. The tension-compression bearing carbon fiber composite material winding joint comprises an outer chain ring, a left lining ring, a right lining ring and a middle piece; the jointing areas between the outer chainring and the left and right lining rings as well as the middle piece are bonding areas. When the tension-compression bearing carbon fiber composite material winding joint bears tension load, the outerchain bears the load; when the tension-compression bearing carbon fiber composite material winding joint bears compression load, the middle piece bears the load. The tension-compression bearing carbon fiber composite material winding joint takes into full consideration the stress form of a joint structure and makes use of the excellent designability of composite materials, namely, carbon fiber composite materials, thereby, compared with metal joints, being capable of ensuring structural rigidity and meanwhile greatly reducing the dead load. The tension-compression bearing carbon fiber composite material winding joint overcomes the shortcomings of poor interlayer performance and layering proneness of traditional laminated composite material joints, is simple and practical in forming processes and applicable to scale production and avoids manufacturing damage caused by mechanical tapping.

Description

technical field [0001] The invention belongs to the technical field of joint materials, in particular to a carbon fiber composite winding joint used for tension-compression bearing and a preparation method thereof. Background technique [0002] Load-bearing joints are an indispensable and important part of the structural design of modern aircraft. Today, common commercial and military aircraft and other aircraft are mostly metal load-bearing joints. With the extensive use of composite materials in various types of aircraft such as passenger planes and UAVs, the use of composite material load-bearing joints to replace traditional metal joints and to achieve further optimization of structural weight under the condition of ensuring the structural rigidity of the aircraft is the focus of aircraft structure research in recent years. a main direction. [0003] Existing composite load-bearing joints are mainly divided into two categories: laminated composite joints and three-dimen...

AI Technical Summary

Problems solved by technology

The interlayer performance of traditional laminated composite joints is poor, and delamination is easy to occur after impact and damage, and mechanical drilling is easy to cause manufacturing damage at the opening of the laminated structure, causing stress concentration and accelerating structural failure

The proposal of three-dimensional braided composite material joints overcomes the above difficulties and solves the problem of easy delamination of laminated joints after loading. However, due to the complicated weaving process and difficult forming, the production cost is greatly increased.

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