Shape memory composite material connecting device

Abstract

The invention provides a shape memory composite material connecting device and belongs to the technical field of new materials. Connections are regarded as essential links in the application of composite material components and the connection performance directly affects the performance of a whole structure. However, the problems that fibers are broken due to hole punching, the stress concentration easily occurs and the structural reliability is poor exist during the current bolted or riveted connections of composite materials. In order to solve the above problems, the shape memory composite material connecting device is provided. The shape memory composite material connecting device is based on the shape memory recovery function of a shape memory composite material; the temperature change and the deformation of convex locking rings on connecting pipes are controlled by the adoption of electric heating; and the mechanical locking with joint grooves is achieved. In the assembly process, the connecting pipes are inserted into joints after being heated, and the mechanical locking is achieved after the connecting pipes are cooled to the room temperature. The shape memory composite material connecting device is designed to be a connecting device which is light in weight, can be disassembled without damage, can be automatically controlled, is suitable for composite material structures, can be applied to the fields of aerospace, automobiles, high-speed rails and the like, as well as has very broad application prospects.

Description

technical field [0001] The invention relates to a connection joint with an automatic control locking function, in particular to a shape memory composite material connection device, which belongs to the technical field of new materials. Background technique [0002] Composite materials have the advantages of low density, high specific modulus and specific strength, corrosion resistance, etc., and are more and more widely used in aerospace, automobile, high-speed rail, ship and other equipment. When assembling parts of different composite materials, the operation of connection must be carried out, so the connection structure is an indispensable link in the application of composite materials, and the performance of the connection directly affects the performance of the entire structure. At present, the common connection methods of composite materials include bolt connection, riveting and glue connection. Bolts or rivets can cause fibers to break, which reduces the load-bearing...

AI Technical Summary

Problems solved by technology

Bolts or rivets can cause fiber breakage, which reduces the load-bearing capacity of the structure and can be a source of failure

Adhesive bonding uses adhesives to connect different parts without drilling, and has good manufacturability, but it is greatly affected by the environment, has poor reliability and stability, and is a permanent connection, which is difficult to disassemble

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