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Preparation method of hollow round tube pyramid type completely composite material lattice laminboard

A composite material and pyramid technology, applied in the field of preparation of pyramid-shaped lattice sandwich panels, can solve problems such as poor mechanical properties, and achieve the effect of large moment of inertia

Inactive Publication Date: 2014-01-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of poor mechanical properties of the currently prepared pyramid-shaped full-composite lattice sandwich panel at low density, and propose a method for preparing a pyramid-shaped full-composite lattice sandwich panel with a hollow tube

Method used

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  • Preparation method of hollow round tube pyramid type completely composite material lattice laminboard
  • Preparation method of hollow round tube pyramid type completely composite material lattice laminboard
  • Preparation method of hollow round tube pyramid type completely composite material lattice laminboard

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specific Embodiment approach 1

[0015] Specific implementation mode one: combine figure 1 Describe this embodiment, the preparation method of the hollow circular tube pyramid type all-composite lattice sandwich panel of this embodiment is completed by the following steps: Step 1: prepare rigid mold; rigid mold is made of a plurality of monomers 1 and two side plates 2, the cross-sectional shape of each monomer 1 is trapezoidal, and the cross-sectional shape of each side plate 2 is a right-angled trapezoidal shape; on a slope of each monomer 1, a plurality of pairs of the first through the slope width direction are processed. Semicircular through holes 1-1, each pair of first semicircular through holes 1-1 are arranged in a figure-eight shape, and each pair of first semicircular through holes 1-1 on the other slope of each monomer 1 A plurality of pairs of second semicircular through-holes 1-2 penetrating along the width direction of the slope are processed at the corresponding positions, and each pair of sec...

specific Embodiment approach 2

[0025] Specific implementation mode two: combination figure 1 To illustrate this embodiment, in Step 1 of this embodiment, the thermal expansion mandrel 5 is made of silicone rubber or polymethacrylimide foam. Other compositions are the same as in Embodiment 1.

specific Embodiment approach 3

[0026] Embodiment 3: In step 7 of this embodiment, the curing temperature is 120° C., the curing time is 2 hours, the longitudinal pressing pressure is 1 MPa, and the transverse pressure on the fiber column 6 is 1 MPa. Pressure can be applied to both the panel and the fiber column, so that the fiber column is not easy to split when loaded, which can improve the mechanical properties of this type of sandwich structure and increase the structural strength by at least 2 times. Other method steps are the same as those in the first or second embodiment.

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Abstract

The invention discloses a preparation method of a hollow round tube pyramid type completely composite material lattice laminboard, which relates to a preparation method for a pyramid type lattice laminboard. The invention aims to solve the problem of low density and poor mechanical property of the existing pyramid type completely composite material lattice laminboard. The key technical points are as follows: preparing a rigid die; processing the die; fixing the rigid die; preparing prepreg or winding fiber columns by winding a thermal expansion core dies through the pregreg or a fiber bundle socked in the resin; preparing a hollow round tube structure; plugging the prepared fiber columns with the thermal expansion core dies into a first round through hole and a second round through hole, and exposing two ends of a plurality of fiber columns out of the rigid die; laying an unidirectional fiber prepreg on the upper and lower surface of a combined die, splitting two ends of the fiber columns exposed outside the rigid die along the axial direction of the fiber columns and per-casting in the prepreg on the upper and lower surfaces; and curing and demoulding. The invention is used for preparing the hollow round tube pyramid type completely composite material lattice laminboard.

Description

technical field [0001] The invention relates to a preparation method of a pyramid-shaped lattice sandwich panel. Background technique [0002] Most of the materials used in the existing lattice sandwich panel structure are metal materials. For the previous pyramid-shaped lattice structure, whether it is a metal material system or a composite material system, when the density of the lattice structure is low, the rods It is prone to buckling and the strength of the structure decreases rapidly, and the hollow rods of the same density have a larger moment of inertia, so the ability to resist buckling deformation is much higher than that of solid rods. Under the metal material system, the hollow circular tube pyramid-shaped lattice sandwich structure adopts the stamping and folding preparation process. The hollow circular tube pyramid-shaped sandwich core is a new configuration. There is no pyramid-shaped composite material lattice of hollow circular tubes at present. Method for...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/34B29C70/54B29C33/00
Inventor 吴林志殷莎马力
Owner HARBIN INST OF TECH
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