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Preparation method of hollow circular-tube tetrahedral full-composite lattice sandwich board

A composite material and sandwich panel technology, which is applied in the field of preparation of hollow circular tube tetrahedron type full composite lattice sandwich panels, can solve the problem of not being applicable to the preparation of composite lattice sandwich panels, and achieves improved structural strength, The effect of improving mechanical properties

Inactive Publication Date: 2010-11-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the existing preparation process cannot be applied to the preparation of composite material lattice sandwich panels with hollow tube tetrahedron configuration, and to provide a hollow tube tetrahedron full composite material lattice sandwich panel Preparation method of core board

Method used

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  • Preparation method of hollow circular-tube tetrahedral full-composite lattice sandwich board
  • Preparation method of hollow circular-tube tetrahedral full-composite lattice sandwich board
  • Preparation method of hollow circular-tube tetrahedral full-composite lattice sandwich board

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specific Embodiment approach 1

[0016] Specific implementation mode one: combine Figure 1-Figure 4 To illustrate this embodiment, the steps of the preparation method of the hollow tube tetrahedral full-composite lattice sandwich panel of this embodiment are as follows:

[0017] Step 1: Rigid mold preparation and mold processing:

[0018] Rigid mold preparation: The rigid mold is composed of multiple 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 trapezoid; A plurality of pairs of first semicircular through-holes 1-1 penetrating along the width direction of the inclined-plane are processed on one slope of 1, and each pair of first semicircular through-holes 1-1 is arranged in a figure-eight shape, and in each monomer 1 On the other slope, a second semicircular through hole 1-2 penetrating along the width direction of the slope is processed on the middle position of each pair of first semicircu...

specific Embodiment approach 2

[0027] Embodiment 2: The heat-expandable mandrel 5 in step 1 of this embodiment is made of polymethacrylimide foam. The heat-expandable mandrel 5 remains in the sandwich structure with round holes in the panel, and such a structure has improved impact resistance and excellent dielectric properties. Other method steps are the same as those in the first embodiment.

specific Embodiment approach 3

[0028] Embodiment 3: The heat-expandable mandrel 5 in step 1 of this embodiment is made of silicone rubber, and in step 6, the heat-expandable mandrel 5 is extruded after demolding the rigid composite mold. Other method steps are the same as those in the first embodiment.

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Abstract

The invention provides a preparation method of a hollow circular-tube tetrahedral full-composite lattice sandwich board, and relates to the tetrahedral full-composite lattice sandwich board and the preparation method thereof. The preparation method solves the problem that the existing preparation process is not applicable to preparing the hollow circular-tube tetrahedral composite lattice sandwich board. The preparation method comprises the following steps: preparing and treating a die; pre-forming a composite hollow circular tube: rolling prepreg or winding fiber bundles with the prepreg or the fiber bundles soaked with resin on the outer wall of a thermal expansion core model, and then filling the manufactured fiber column with the thermal expansion core model into a mounting hole of a rigidly assembled die; laying the unidirectional fiber prepreg on the upper surface and the lower surface of the rigidly assembled die, splitting the fiber column at outer side of the rigidly assembled die, and then embedding the split fiber columns into the unidirectional fiber prepreg; heating, pressurizing and curing the rigidly assembled die; demoulding; and finally splicing a sandwich structure in which a panel is provided with circular holes with a composite panel. The preparation method of the invention is used for preparing the tetrahedral full-composite lattice sandwich board.

Description

technical field [0001] The invention relates to a preparation method of a tetrahedral hollow-tube tetrahedral full-composite lattice sandwich panel. Background technique [0002] Compared with metal materials, composite materials have higher specific strength and specific stiffness. Most of the materials used in the existing lattice sandwich panel structure are metal materials. Compared with the traditional metal lattice sandwich panel, the composite lattice sandwich panel has higher specific strength and specific stiffness, and has a higher specific strength. Strong designability. For the previous tetrahedral lattice structure, when the lattice structure density is low, the bar is prone to buckling and the strength of the structure drops rapidly, while the hollow bar with the same density has a larger moment of inertia, so the ability to resist buckling deformation Much higher than solid. Under the metal material system, the hollow tube tetrahedron lattice sandwich struc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54B29C33/00
Inventor 殷莎吴林志马力张国旗
Owner HARBIN INST OF TECH
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