Cementing connection structure of composite material sandwich panel without surface bulges, and preparation method of cementing connection structure

Abstract

The invention discloses a cementing connection structure of composite material sandwich panel without surface bulges, and a preparation method of the cementing connection structure, belonging to the field of material structures. The structure provided by the invention is in a toothed connection formed by means of coincidence of a glass fiber reinforced panel of a connecting piece A and a glass fiber reinforced panel of a connecting piece B, and the connecting pieces A and B are cementing with each other by using an epoxy composite material adhesive; the length of a foam core material of the connecting piece A is the same as that of the glass fiber reinforced panel, and the length of a foam core material of the connecting piece B is broken at the turning place of the panel fibers of the connecting piece B, so that the coincidence with the connecting piece A is guaranteed during insertion; the foam core materials are stuck by using insulating glue. Compared with the traditional compositematerial sandwich panel cementing method, the composite material sandwich panel cementing method enlarges the cementing area by means of the toothed connection, can effectively guarantee the improvement of the cementing strength, and enables no bulge to exist on the surface after connection, so that the structure is more suitable for practical application; therefore, the structure has a wide application prospect.

Description

technical field [0001] The invention relates to a glue joint connection technology of composite material interlayer boards, which can realize smooth material surfaces without protrusions at glue joints, and belongs to the field of material structure. Background technique [0002] The composite material sandwich structure is composed of panels and core materials. It is a structural composite material with high structural rigidity, light weight, good designability, and the ability to give full play to the advantages of material composite effects. Therefore, it is widely used in aerospace , shipbuilding industry, automobile manufacturing, engineering shock absorption and explosion protection, etc. [0003] The connection methods of composite sandwich structures mainly include mechanical connection, adhesive connection, hybrid connection and so on. Mechanical connections include riveting (a non-detachable connection), screwing (can transmit large loads, facilitate loading and u...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides an adhesive connection structure and a preparation method of composite material sandwich panels without protrusions on the surface, aiming at overcoming the stress concentration at the opening of the structure caused by the traditional mechanical connection and the unevenness of the connection and the traditional adhesive connection bonding The problem of small area and insufficient strength

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