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

A composite material and connection structure technology, applied in the field of adhesive connection technology, can solve the problems of stress concentration at the opening of the structure, uneven connection, small bonding area, etc., achieve smooth surface, reliable quality, and increase the bonding area Effect

Active Publication Date: 2019-01-01
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Embodiment Construction

[0025] Below in conjunction with accompanying drawing, the present invention will be further described:

[0026] combine Figure 1-7 , the purpose of the present invention can be achieved in the following ways:

[0027] Step 1: Cut the woven glass fiber cloth 6, the foam 7, 9 according to the required size, and make the template 5 and the spacer 10. Such as figure 2 with Figure 4 As shown, the number of layers of glass fiber cloth 6 determines the thickness of panels 8 and 11, and the specific algorithm is to multiply the thickness of single-layer woven glass fiber by the number of laying layers to obtain the thickness of panels 8 and 11. Such as figure 2 As shown, take the foam of the required thickness, cut the bevel of the required angle at a certain distance from the end (required lap length), and then cut off a trapezoidal foam block 12A on the upper and lower surfaces, and the thickness of the trapezoid is the bevel template. 5 times the thickness, the molded foa...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C65/48
CPCB29C65/48B29C66/10
Inventor 王振清李佳禾海伶杨浩官成宇
Owner HARBIN ENG UNIV
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