Method for bonding carbon fiber pipe with metal flanges internally and externally

Abstract

The invention provides a method for bonding a carbon fiber pipe with metal flanges internally and externally. The method comprises the following steps of: step 1, carrying out surface treatment on the carbon fiber pipe and the metal flanges to be connected; step 2, connecting the carbon fiber pipe after the surface treatment with an outer metal flange through carbon filaments; step 3, connecting an inner metal flange through the carbon filaments, and locating the inner metal flange and the outer metal flange through flange hole dowel pins; step 4, taking off the flange hole dowel pins and removing excessive adhesive; and step 5, bonding, heating and curing the carbon fiber pipe and the metal flanges. According to the method for bonding the carbon fiber pipe with the metal flanges internally and externally, disclosed by the invention, a new connection manner is provided for the carbon fiber pipes and metal connecting pieces, the method is simple and convenient, the connection capability between the carbon fiber pipes and metal joints is effectively improved and the safety and the reliability of a structural system are increased.

Description

technical field [0001] The invention belongs to the technical field of composite material space trusses, and in particular relates to a method for internally and externally bonding a carbon fiber pipe fitting and a metal flange. Background technique [0002] Stratospheric aerostats have been paid attention to by various countries because of their extensive civil and military applications. The aerostat relies on net buoyancy to stay at an altitude of 20,000 to 30,000 meters. Because the air in this airspace is thin and the buoyancy is small, lightweight design is the key to the development of the aerostat. The structural system supporting the entire platform of the aerostat adopts a space truss structure, and the basic components of the truss structure are light, high-strength carbon fiber composite pipe fittings and aerospace aluminum alloy connectors. The truss structure of the aerostat is different from the truss structure on the spacecraft. It needs to bear a large load ...

AI Technical Summary

Problems solved by technology

The bonding force of carbon fiber pipe fittings and metal cylindrical connectors is proportional to the bonding length within a certain range. After the critical length is exceeded, the bonding force does not increase with the increase of the bonding length. This phenomenon limits the bearing capacity of carbon fiber pipe fittings.

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