Method for connecting resin-based composite material tube and metal material

Abstract

The invention relates to a method for connecting a resin-based composite material tube. The technical scheme of the invention is that: the outer surface of a joint of the resin-based composite material tube is provided with threads to match threads on the inner wall of a metal sleeve; and the metal sleeve of which the outside diameter is same as the inside diameter of the composite material tube is inserted into the joint of the resin-based composite material tube. The method overcomes respective defects of the conventional composite material connecting modes such as adhesion, bolt connection and adhesive and bolt mixed connection. The metal sleeve is connected with the composite material tube through the threads; the composite material tube is applied with radial pressure by an annular high-strength bolt or an interference fit method, the ultimate bearing capacity of the joint is improved, and the member stress reaches 700MPa; the shearing resistance of helical teeth and the interface friction transmit force together, so the connecting method has the advantages of difficult ageing, good fatigue resistance and multiple suitable section forms; and single or dual lug joints between composite material truss units, ball joints of composite material space trusses, anchorage devices with composite material ribs and cables can be manufactured and applied to truss bridges, space grids and prestressed bridges.

Description

technical field [0001] The invention relates to a connection technology of resin-based composite materials, in particular to a method for connecting pipes of resin-based composite materials. Background technique [0002] Before the present invention, composite materials had the advantages of light weight, high strength, and corrosion resistance, and resin-based composite materials were widely used in civil engineering. The traditional connection methods of composite materials include cementation, bolt connection and glue-screw hybrid connection, etc. The traditional bolt connection form is relatively simple, and can basically be applied to the connection of various composite material components. However, when composite material components are connected by bolts, holes need to be drilled in the material, which greatly weakens the overall bearing capacity of the structure, often causing the components to fail before the connection is damaged first, so this connection form is ...

AI Technical Summary

Problems solved by technology

However, when composite material components are connected by bolts, holes need to be drilled in the material, which greatly weakens the overall bearing capacity of the structure, often causing the components to fail before the connection is damaged first, so this connection form is generally used in load levels Smaller cases; the glue joint connection is non-detachable, although this connection does not weaken the components, but because of the low shear strength of the glue itself, it affects the ultimate bearing capacity of the connected components; glue screw mixed connection, and Like general adhesive joints, due to the thinner adhesive layer, the adhesive layer and the bolts cannot be deformed uniformly. Finally, when the load is applied, the adhesive layer is often sheared and damaged, and the bolts are stressed again, and there is no joint action.

Therefore, traditional connection methods limit the application of composite materials in civil engineering

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