Bonding methods for composite pipe fittings and their connections

Abstract

The invention relates to a composite material pipe fitting which comprises a composite material pipe and a connection part; the pipe orifice of the composite material pipe is provided with pipe fitting bonding surfaces with multiple steps; the connection part is provided with step-shaped connection part bonding surfaces which correspond to and are mutually matched with the steps of the pipe fitting bonding surfaces of the composite material pipe one to one. According to a connecting method adopting step-shaped bonding layers, the defects in the prior art can be effectively overcome, and all loads are evenly allocated to the multiple step-shaped connection part bonding surfaces, so that each step evenly bears one part of the total loads, the shearing strength between each layer of composite material pipe and the connection part is correspondingly reduced, and cracks are difficult to generate; therefore, the aims of improving load transferring capability, improving the connection effect and reducing the weight are achieved.

Description

technical field [0001] The invention relates to a composite material pipe fitting and a bonding method for its connection. Background technique [0002] In order to reduce the self-weight of the space truss and realize the lightweight design, the basic components of the space truss are lightweight, high-strength carbon fiber composite material pipe fittings and metal (or non-metal, composite material, etc.) connecting parts. Generally, the bonding form of composite material pipe fittings and connecting parts can be divided into external bonding (connecting parts are attached to the outer wall of composite material pipe), internal bonding, etc. [0003] The method disclosed in the published Chinese patent "A method of bonding composite material pipe fittings and metal flanges inside and outside" (Application Publication No.: CN 102278342 A) is an effective method for simultaneously bonding flange-type joints on both sides of the composite material pipe fittings The connectio...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is: to overcome the technical problem of poor connection effect of composite material pipe fittings in the prior art, to provide a kind of composite material pipe fitting and its bonding method, the connection method of adopting the step-shaped adhesive layer can effectively avoid the above-mentioned Defects, all the loads are evenly distributed to the bonding surfaces of multiple stepped connecting parts, so that each step can evenly bear a part of the total load, so that the shear stress between each layer of composite material pipes and connecting parts is correspondingly reduced, and it is not easy to initiate Cracks, so as to achieve the purpose of improving load carrying capacity, improving connection effect and reducing weight

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