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Partially-enhanced X-cor foam core sandwich T-joint structure and molding method

A technology of local reinforcement and molding method, applied in the field of fiber composite material reinforcement, can solve the problems of strength and complicated process, and achieve the effects of improving production efficiency, improving connection performance and high production efficiency

Inactive Publication Date: 2015-12-30
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a partially reinforced X-cor foam interlayer T-joint structure and a forming method for the problem that the strength of the T-joint joint of the sandwich structure is contradictory with the cumbersome process at present.

Method used

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  • Partially-enhanced X-cor foam core sandwich T-joint structure and molding method
  • Partially-enhanced X-cor foam core sandwich T-joint structure and molding method
  • Partially-enhanced X-cor foam core sandwich T-joint structure and molding method

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Embodiment 1

[0033] Example 1: Combining Figure 1-2 This embodiment will be described.

[0034] A locally reinforced X-cor foam sandwich T-joint structure (such as figure 2 ) includes skin foam core material 1, skin panel 2 wrapped outside it; web foam core material 3, web panel 4 wrapped outside it, skin foam core material 1 and web foam core material 3 perpendicular The connection forms a T-shaped joint, and the two sides of the T-shaped joint are fixed by the reinforcing layer 5. By implanting high-performance Z-pin6 inside the foam core material, it is possible to implant Z-pin6 in the weak performance of the T-shaped joint, that is, the connection area. Supporting the foam core material can also improve the connection performance of the T-joint. The reinforcing layer 5 has an L-shaped structure, one end is connected to the skin panel 2 and the other end is connected to the web panel 4 .

[0035] Such as figure 1 It is a schematic cross-sectional view of a foam sandwich T-shaped ...

Embodiment 2

[0036] Example 2: Combining Figure 1-4 This embodiment will be described.

[0037] A method for forming a partially reinforced X-cor foam sandwich T-joint, comprising the following steps:

[0038] Step 1: Using T300 carbon fiber (3K tow) and FW125 epoxy resin as raw materials, prepare high-performance fully cured Z-pin6 with a diameter of 0.5mm through advanced pultrusion equipment;

[0039] Step 2: On the skin foam core material 1 and the web foam core material 3 (PMI, Rohacell-51WF, thickness 12.5mm), mark out the area where the T-joint needs to be implanted with the Z-pin, and place the Z-pin according to the following Set the parameters (the angle is 60°, the spacing is 5mm×5mm), implant the high-strength foam core material, and expose the corresponding lengths at both ends of the foam in different areas, and the skin core material exposed part length a, b (such as image 3 , a=b=1.5mm) corresponds to the thickness of the skin panel 2 plus the reinforcing layer, (the th...

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Abstract

The invention relates to a partially-enhanced X-cor foam core sandwich T-joint structure and a molding method. The partially-enhanced X-cor foam core sandwich T-joint structure comprises a skin foam core material (1) and a skin panel (2) covering the outer side of the skin foam core material (1), a web foam core material (3) and a web panel (4) covering the outer side of the web foam core material (3), wherein the the skin foam core material (1) and the web foam core material (3) are vertically connected to form a T-joint; the two sides of the T-joint are fixed through reinforcing layers (5); high-performance Z-pin (6) is planted into the foam core material so that the foam core material can be supported and the connection performance of the T-joint also can be improved. According to the partially-enhanced X-cor foam core sandwich T-joint structure, the connection intensity, rigidity and stability of the T-joint of a sandwich structure are remarkably improved, the technological process is simple and the production efficiency is high. Parameters including materials, angles, diameters, densities and the like of the planted Z-pin can be adjusted so that the performance of the T-joint is changed, and the partially-enhanced X-cor foam core sandwich T-joint structure has the advantage of the designability of a composite material.

Description

technical field [0001] The invention relates to a new Z-pin reinforcement technology for fiber composite materials, in particular to a locally reinforced X-cor foam interlayer T-shaped joint structure and a forming method, and belongs to the technical field of fiber composite material reinforcement. Background technique [0002] The composite foam sandwich structure is prepared by bonding and curing high-strength skin and low-density and light-weight foam core material. It has the advantages of high specific strength, high specific stiffness, and strong designability. And widely used in automobile manufacturing. Among them, the foam sandwich T-joint is the most common connection method in the sandwich structure. [0003] At present, the connection forms of foam interlayer T-joint mainly include glue joint, glue-seam hybrid connection and glue-screw hybrid connection. Among them, the glue connection is the simplest T-shaped connection method, and the insufficient strength o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B1/06B32B9/00B32B27/04B32B5/18B29C47/00B29C70/34B29C65/02B32B1/00
CPCB29C48/00B29C65/02B29C70/34B32B5/18B32B9/007B32B2260/021B32B2260/046B32B2262/106B32B1/00
Inventor 李勇还大军沈裕峰肖军李吻
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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