A quasi-three-dimensional reinforced composite lattice sandwich structure and its manufacturing method

A sandwich structure and composite material technology, applied in the field of composite material structure, can solve problems such as weak surface-core bonding strength, achieve the effect of improving interface strength, improving mechanical properties, and improving mechanical properties

Active Publication Date: 2017-09-22
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical purpose of the present invention is to provide a quasi-three-dimensional reinforced composite lattice sandwich structure and a manufacturing method for the problem that the surface-core bonding strength of the existing fiber-reinforced resin-based composite lattice sandwich structure is weak

Method used

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  • A quasi-three-dimensional reinforced composite lattice sandwich structure and its manufacturing method
  • A quasi-three-dimensional reinforced composite lattice sandwich structure and its manufacturing method
  • A quasi-three-dimensional reinforced composite lattice sandwich structure and its manufacturing method

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Effect test

Embodiment 1

[0045] A quasi-three-dimensional reinforced composite material lattice sandwich structure, which is composed of fiber cloth and a woven lattice core. The woven lattice core is formed by interspersing and woven fiber cloth strips in an orthogonal manner. There is cubic foam as the core, the length of the quasi-three-dimensional reinforced composite lattice sandwich structure is [ml+xt(m-1)], and the structure width is [nl+xt(n-1)], The height of the structure is [2t(x+y)+l], where: m and n are the number of horizontal and vertical cube foams, l is the side length of the cube foam, and x and y are the lattice core and the panel ply. Number, t is the thickness of single-layer fiber cloth.

[0046] The fibers of the fiber cloth are glass fibers or carbon fibers.

Embodiment 2

[0048] A quasi-three-dimensional reinforced composite material lattice sandwich structure, which is composed of a prepreg and a braided lattice core. The braided lattice core is made of prepreg strips interspersed vertically and horizontally in an orthogonal manner. The prepreg There is a cubic foam between the strips as the core, the length of the structure is [ml+xt(m-1)], the width of the structure is [nl+xt(n-1)], and the height of the structure is [ 2t(x+y)+l], where: m and n are the number of horizontal and vertical cube foams, l is the side length of the cube foam, x and y are the number of dot matrix cores and panels, and t is a single layer Thickness of prepreg.

[0049] The prepreg is glass fiber reinforced resin-based prepreg or carbon fiber reinforced resin-based prepreg.

Embodiment 3

[0051] A method for manufacturing a quasi-three-dimensional reinforced composite material lattice sandwich structure includes the following steps:

[0052] 1) Determine that the lattice sandwich structure is composed of m rows and n columns of cubic foam cores and fiber cloth strips and upper and lower panel fiber cloth. m and n are non-zero natural numbers, the number of core layers is x, and the panel is laid The number of layers is y; the thickness of the single-layer fiber cloth is t, the side length of the cubic foam core is l, the total length of the target lattice sandwich structure is [ml+xt(m-1)], and the total width is [nl+xt (n-1)], the height is [2t(x+y)+l];

[0053] 2) Cut the fiber cloth raw materials into rectangular strips with a width of l according to the target structure size. The length of the longitudinal fiber cloth strips is greater than (2m-1)l, and the length of the transverse strips is greater than (2n-1)l. The cut rectangular strips are stacked neatly; c...

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Abstract

The invention discloses a quasi-three dimensional enhanced composite dot matrix interlayer structure and a manufacturing method thereof. The dot matrix interlayer structure is composed of orthogonally-woven rectangular fabric cloth or a prepreg strip, a three-dimensional foam core and a panel pavement layer. The designability of the composite structure is ingeniously utilized, and a new quasi-three dimensional weaving structure is designed to serve as a dot matrix core and is simultaneously cured and formed with a panel. On the premise that component materials are the same, compared with existing dot matrix interlayer structures (such as a grid interlayer structure, a honeycomb interlayer structure, a foam interlayer structure and a three-dimensional dot matrix interlayer structure), the interface strength between the panel and the core is greatly improved, the problem that fiber in a conventional dot matrix interlayer structure core pavement layer is not continuous is solved, and therefore the bending strength, the shearing strength, the lateral pressure strength and the like of the interlayer structure are improved, and very important significance is achieved for the development of the composite three-dimensional structure enhancing technology.

Description

Technical field [0001] The invention belongs to the technical field of composite material structures, and relates to a technology for enhancing the performance of composite material lattice sandwich panel members, and specifically is a quasi-three-dimensional reinforced composite material lattice sandwich structure and a manufacturing method thereof. Background technique [0002] Advanced composite materials represented by fiber-reinforced resin matrix composites have outstanding advantages such as light weight, high strength, high modulus, fatigue resistance, corrosion resistance, integration of structure and function, integration of design and manufacturing, and easy molding of large components. They have been used in aviation , Aerospace and other fields have been widely used. However, the fiber-reinforced resin-based composite sandwich panel has a weak surface-core bonding performance, which limits its application to a certain extent. [0003] The core material of the composit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/36
CPCB29C70/36
Inventor 刘杨陆晓峰朱晓磊周昌玉刘路维
Owner NANJING TECH UNIV
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