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Locally-reinforced composite dot-matrix sandwich panel and preparation method thereof

A composite material and local reinforcement technology, applied in chemical instruments and methods, lamination, lamination devices, etc., can solve the problem of low shear strength and achieve the effect of improving shear strength, increasing strength and stabilizing the structure

Inactive Publication Date: 2010-09-22
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 low overall shear strength of the existing automatically formed composite lattice sandwich panels due to the combination of internal structures by bonding, and to provide a locally reinforced composite lattice sandwich panel. Core board and its preparation method

Method used

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  • Locally-reinforced composite dot-matrix sandwich panel and preparation method thereof
  • Locally-reinforced composite dot-matrix sandwich panel and preparation method thereof
  • Locally-reinforced composite dot-matrix sandwich panel and preparation method thereof

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Experimental program
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specific Embodiment approach 1

[0016] Specific implementation mode one: the following combination Figure 1 to Figure 7 Describe this embodiment, this embodiment is made up of pyramid lattice core 1, a plurality of reinforcing pieces 2, composite material upper panel 3 and composite material lower panel 4,

[0017] The pyramid lattice core 1 is composed of a plurality of unidirectional fiber lattice structural monomers 1-1, and each unidirectional fiber lattice structural monomer 1-1 is a continuous W-shaped integral piece composed of four rods. The connection of adjacent rods has a slot structure, and a plurality of unidirectional fiber lattice structure monomers 1-1 interlock each other in a criss-cross pattern through the slot structure to form a pyramid lattice core 1; all two unidirectional fiber points The mutual occlusion of the array structure monomers 1-1 is reinforced by a reinforcing piece 2, and all the reinforcing pieces 2 located at the upper end of the pyramidal lattice core 1 are bonded toge...

specific Embodiment approach 2

[0019] Specific implementation mode two: the following combination Figure 5 This embodiment is described. The difference between this embodiment and Embodiment 1 is that the center of the reinforcement member 2 has a through hole or a blind hole for reinforcement. Other components and connections are the same as those in Embodiment 1.

[0020] When the center of the reinforcement 2 is a through hole, while the composite upper panel 3 and the composite lower panel 4 are bonded to the reinforcement 2, they are also bonded to the two unidirectional fiber lattice structure monomers 1-1 reinforced by the reinforcement 2. 1. The outer surfaces of the joints are bonded at the same time; when the center of the reinforcement 2 is a blind hole, the composite upper panel 3 and the composite lower panel 4 are respectively bonded to the bonding surfaces of the reinforcement 2. The use of the reinforcing member 2 further strengthens the constraint between the unidirectional fiber lattice ...

specific Embodiment approach 3

[0021] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the reinforcing member 2 is circular, elliptical, square, rectangular or rhombus. Other compositions and connections are the same as those in the first or second embodiment.

[0022] The shape of the reinforcing piece 2 can be selected according to the needs in actual use.

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Abstract

The invention relates to a locally-reinforced composite dot-matrix sandwich panel and a preparation method thereof, belonging to the technical field of composite preparation and aiming at solving the problems that the existing automatically-molded composite dot-matrix sandwich panel has low integral shearing strength because the internal structures thereof are combined in an adhering way. The sandwich panel comprises pyramid dot-matrix cores, reinforcing parts, an upper composite panel and a lower composite panel. The preparation method of the sandwich panel comprises the following steps: clearing the molding surfaces of molds, and applying mold releasing agent to the molding surfaces of the molds; laying and filling impregnated resin fiber bundles in the groove of the female mold along the direction of the groove in succession, and assembling the female mold and the male mold; preparing unidirectional fiber dot-matrix structure monomers; mutually meshing the unidirectional fiber dot-matrix structure monomers in a crossing way, and reinforcing the unidirectional fiber dot-matrix structure monomers with the reinforcing parts; and adhering the reinforcing parts arranged on the upper end and the lower end of the pyramid dot-matrix cores to both the upper composite panel and the lower composite panel, thereby obtaining the composite dot-matrix sandwich panel.

Description

technical field [0001] The invention relates to a partially reinforced composite material lattice sandwich panel and a preparation method thereof, belonging to the technical field of composite material preparation. Background technique [0002] The lattice structure is a new type of structure designed to meet the requirements of lightweight and multifunctional engineering structures. It has the advantages of high specific stiffness, high specific strength and strong designability. This new structure can effectively withstand external loads, and has the advantages of easy wiring, easy pre-embedding of micro devices and filling of functional materials. It is an ideal structural platform for ultra-light and multifunctional structures. With the help of this ultra-light structure platform, people can realize different functional structures, such as a multi-functional structure integrating structure, thermal control and micro-devices; a multi-functional structure integrating struc...

Claims

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Application Information

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IPC IPC(8): B32B3/12B32B37/12
Inventor 吴倩倩吴林志
Owner HARBIN INST OF TECH
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