Method for preparing pyramid-shaped composite three-dimensional lattice sandwich structure

A technology of sandwich structure and three-dimensional lattice is applied in the field of preparation of composite lattice structure, which can solve the problems of low production efficiency and complex three-dimensional lattice structure process, achieve high production efficiency, improve preparation efficiency and mechanical properties, The effect of simple operation process

Inactive Publication Date: 2016-02-24
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of complex process and low production efficiency in preparing the three-dimensional lattice structure of fiber reinforced composite materials, and further provide a preparation process for the three-dimensional lattice structure

Method used

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  • Method for preparing pyramid-shaped composite three-dimensional lattice sandwich structure
  • Method for preparing pyramid-shaped composite three-dimensional lattice sandwich structure
  • Method for preparing pyramid-shaped composite three-dimensional lattice sandwich structure

Examples

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Effect test

Embodiment 1

[0030] see Figure 1 to Figure 6 , according to the following steps to prepare a pyramid-shaped composite three-dimensional lattice sandwich structure:

[0031] Step 1: Prepare the base with five tenons in the three-dimensional lattice sandwich structure of the pyramid composite material

[0032] The base structure with five tenons is as figure 1 As shown, one of the tenons 1 is perpendicular to the surface of the base and is used to connect the upper skin or the lower skin; the other four tenons 2 form a certain angle with the other surface of the base and are used to connect and form pyramidal core cells. Yuan's four sandwich tubes. The method of preparing the base with tenons is the casting method, and the specific process is as follows:

[0033] According to the design and manufacture of the matching mold of the upper mold and the lower mold (see figure 2 ), figure 2 (a) The upper mold shown has a large groove, and a small cylindrical groove perpendicular to the sur...

Embodiment 2

[0044] In this embodiment, the preparation method of the pyramidal composite lattice sandwich structure is only different from that of Embodiment 1 in Step 3. Specifically, Step 3 uses a vacuum-assisted resin injection molding method to prepare the upper and lower skins. The method is as follows:

[0045] Choose glass or thin metal plate as the backing plate, wash the surface with acetone to remove stains and spray release agent; lay fiber dry cloth layer by layer, and then lay isolation film, release cloth and diversion net in sequence, and use a sealed bag Carry out sealing; evacuate with a vacuum pump (vacuum pressure is 0.08MPa), keep the pressure for 1 hour, inject resin (vinyl resin or low-viscosity epoxy resin), after curing at room temperature for 12 hours, take out the fiber laminate product and perform surface polishing , and then prefabricating the corresponding through holes to complete the preparation of the skin panel.

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Abstract

The invention discloses a method for preparing a pyramid-shaped composite three-dimensional lattice sandwich structure. The method for preparing the pyramid-shaped composite three-dimensional lattice sandwich structure comprises the steps that 1, a base provided with five tenons is prepared; 2, a hollow sandwich pipe is prepared; 3, lattice skin is prepared; 4, the base and the sandwich pipe are assembled into a lattice core of a sandwich structure; and 5, the skin and the lattice core are assembled into the lattice sandwich structure. The method for preparing the pyramid-shaped composite three-dimensional lattice sandwich structure has the advantages that the automation degree is high, and the production cycle is short; in addition, the pyramid-shaped composite three-dimensional lattice sandwich structure prepared through the method is high in structural strength and complete in mechanical property; the periodicity of pyramid-shaped lattice cell elements is good, and the application range is wide.

Description

technical field [0001] The invention relates to a preparation process of a composite material lattice structure, in particular to a preparation process of a pyramid lattice sandwich structure. Background technique [0002] The lattice structure is a new type of structure designed to meet the requirements of lightweight and multi-functional engineering structures. It has the advantages of high specific stiffness, high specific strength, strong designability and meeting multi-functional requirements. The lattice structure can not only effectively bear external loads, but also be easy to wire, implant micro-devices, fill functional materials, etc., so this type of structure is an ideal structural platform for ultra-light and multi-functional structures. People can use this ultra-light structure platform to realize other different functions, such as a multifunctional structure integrating structure, thermal control and micro-devices; a multifunctional structure integrating stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C65/48
CPCB29C65/48B29C66/474
Inventor 姚凯雷红帅温伟斌王长显方岱宁
Owner PEKING UNIV
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