Assembly method of carbon fiber composite truss main structure and fulcrum bar

Abstract

The invention discloses an assembly method of a carbon fiber composite truss main structure and a fulcrum bar, and belongs to the field of space optical remote sensing. The assembly method aims to solve the technical problem that in the assembling process of a large-scale lightweight carbon fiber composite truss structure main structure and the fulcrum bar, the size is decreased, the mass is reduced, the processing difficulty is lowered, the uniformity of the thickness of a glue line is guaranteed, and at the same time, the overall stiffness and the stability of a truss are improved. The assembly method comprises a T-shaped joint, a bridging board and the fulcrum bar, and a thin wall inserting board of the T-shaped joint is inserted into slots of the fulcrum bar; a bridging plane of the bridging board is connected with the thin wall inserting board of the T-shaped joint in a cementing mode, a bridging cylinder plane is connected to the fulcrum bar in a cementing mode, and pressing andsolidification are carried out on cementing areas, so that the thin wall inserting board of the T-shaped joint is not in contact with the fulcrum bar; and a mounting flange is fixed to a truss main structure. According to the assembly method, the thickness and the uniformity of the glue line are easy to control, the size is small, the mass is light, the structure is simple, molding and assemblingare easy, and the carbon fiber composite truss structure is high in stiffness and good in heat stability.

Description

technical field [0001] The invention belongs to the field of space optical remote sensing and relates to an assembly method of a carbon fiber composite material truss main structure and a pole. Background technique [0002] The space truss structure composed of carbon fiber composite materials has the advantages of high specific stiffness, high specific strength, and good thermal stability, and has been widely used in space optical remote sensors. In the design of truss structures, it is inevitable to involve the assembly of a certain position of the main structure and the struts. The material and assembly method of the joint directly affect the mechanical and thermal properties of the entire truss structure. At present, the most commonly used assembly method is: a metal joint is set between the main structure and the strut, the strut is glued together with the metal joint by socketing, and the metal joint is assembled with the main structure by screwing. . This approach ...

AI Technical Summary

Problems solved by technology

[0003] 1. Metal joints are bulky, heavy, complex in structure, and difficult to process; especially when the joint is multi-way, the structure is more complicated and the processing is more difficult

[0004] 2. The support rod is glued together with the metal joint by socketing, and it is impossible to apply pressure to the glue joint, which makes it difficult to control the thickness and uniformity of the glue layer

[0005] 3. The materials of metal joints and composite poles are different. The deformation of metal expansion and contraction in high and low temperature environments is significantly higher than that of carbon fiber composite materials. The difference in deformation between the two materials seriously affects the overall stability of the truss structure

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