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Composite material with foam sandwich structure and preparation method of composite material

A composite material and sandwich technology, applied in the field of composite materials, can solve the problems of high-cost precision and mechanical control, and achieve the effects of enhancing bending strength and compressive strength, strengthening connection, and saving time

Inactive Publication Date: 2012-12-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This requires costly precision and mechanical control, as all struts must be precisely positioned in three dimensions

Method used

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  • Composite material with foam sandwich structure and preparation method of composite material
  • Composite material with foam sandwich structure and preparation method of composite material
  • Composite material with foam sandwich structure and preparation method of composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The structure of the foam sandwich structure composite material of this embodiment is as follows figure 1 As shown, the upper surface layer 1 and the lower surface layer 2 are laminated by eight layers of glass fiber fabrics, and the upper four layers and the lower four layers of the upper surface layer 1 and the lower surface layer 2 are separated by epoxy resin adhesive interlayers. 9 Separated to form an outer surface layer 1.1' and an inner surface layer 1.2', the foam sandwich layer 3 is arranged in parallel with a plurality of foam strips 4 (the left and right directions are arranged in parallel in the figure), and sheet glass fiber fabric is sandwiched between the foam strips 5. The angle between the sheet glass fiber fabric 5 and the upper surface layer 1 and the lower surface layer 2 is a right angle; on the middle surface of every two foam strips 4, there are rectangular cross-section resin grooves 6 parallel to the surface layer (in the figure is the front-to...

Embodiment 2

[0042] Such as figure 2 Shown, the structure of this embodiment composite material is the same as figure 1 Similarly, the angle between the sheet glass fiber fabric 5 and the upper surface layer 1 and the lower surface layer 2 is 45 degrees, and the cross section of the foam strip 4 is a parallelogram, which is stitched at a single angle of 45 degrees (the suture line formed by sewing the roving 8 45-degree angle with the upper and lower surfaces at intervals, without crossing), so that the production efficiency can be greatly improved.

Embodiment 3

[0044] Such as image 3 Shown, the structure of this embodiment composite material is the same as figure 1 Basically the same, except that the glass fiber fabric used for reinforcement in the foam sandwich layer 3 is continuous, extending between the two surface layers in a continuous shape, which greatly improves the fiber fabric 11 and the surface layer 1, The 2 contact area also gives more support to the stitched roving 8 in the transverse direction.

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Abstract

The invention discloses a composite material with a foam sandwich structure and a preparation method of the composite material. The composite material comprises an upper surface layer, a lower surface layer and a foam sandwich layer which is located between the upper surface layer and the lower surface layer; the upper surface layer and the lower surface are formed by overlapping layered fiber fabrics; the foam sandwich layer is formed by arranging a plurality of foam strips, foam plates or foam blocks; parallel sheet-like fiber fabrics are clamped between two adjacent foam strips or adjacent foam plates of the foam sandwich layer; the surfaces on the middle positions of each two foam strips are provided with resin grooves which are parallel with the surface layers; and the resin grooves are crossed with a resin make-up groove which is penetrated in the complete foam sandwich layer in the longitudinal direction; the upper surface layer, the lower surface layer and the sandwich layer are sewn into a complete structure by a sewing rough yarn. The composite material provided by the invention is light in weight and has high strength; the preparation process is simple and the composite material can be molded in one step; and moreover, resin can be injected from the middle layer of the sandwich layer and the injection speed is improved.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a foam sandwich sandwich structure composite material and a preparation method thereof. Background technique [0002] The foam sandwich sandwich structure composite material is made of low-density, closed-cell materials such as closed-cell foam plastics as the sandwich layer and the upper and lower surface layers of fiber fabrics to form a sandwich structure, placed in a vacuum mold, injected with resin, cured and demoulded, It can be formed into a variety of products and has a variety of uses, such as ship hulls, refrigerated trailers, etc. The foam core separates and stabilizes the structural skins, resists shear and pressure, and provides an insulating environment. Between the foam inner sandwich layer and the foam sandwich layer and the surface layer, the structural performance of the sandwich panel can be improved by improving the interconnection and support between the r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/12B32B7/04B32B37/10B32B37/15
Inventor 蔡智奇韩太亮皮丕辉徐守萍文秀芳程江杨卓如
Owner SOUTH CHINA UNIV OF TECH
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