Metal/composite material multilayer double-gradient energy-absorbing vibration-damping sandwich structure and preparation method thereof

A composite material, sandwich structure technology, applied in metal layer products, chemical instruments and methods, synthetic resin layer products, etc., can solve the problem that the interlayer unit cell structure does not have functional gradient effect, etc. The preparation method is simple, the designability is strong, and the effect of improving the performance of buffering and vibration reduction

Active Publication Date: 2019-11-05
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing multi-layer gradient sandwich structure only realizes the structural gradient in the

Method used

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  • Metal/composite material multilayer double-gradient energy-absorbing vibration-damping sandwich structure and preparation method thereof
  • Metal/composite material multilayer double-gradient energy-absorbing vibration-damping sandwich structure and preparation method thereof
  • Metal/composite material multilayer double-gradient energy-absorbing vibration-damping sandwich structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] A method for preparing a metal / composite multilayer double-gradient energy-absorbing and vibration-damping sandwich structure is as follows:

[0035] (1) According to the size of the unit cell structure, design and prepare metal gradient hollow tubular unit cell structures with different relative densities through a rolling cutting process;

[0036] (2) Prepare the metal / composite panel required by the multilayer dual-gradient energy-absorbing and vibration-damping sandwich structure, and polish and clean the surface;

[0037] (3) Design and manufacture molds required for composite unit cell structure;

[0038] (4) Rolling composite prepregs with different gradient configurations on the mold, closing the mold, heating and pressurizing to an appropriate temperature and pressure, and maintaining it for a period of time;

[0039] (5) Cool to room temperature, demould after depressurization, and cut and polish the end of the composite material gradient unit cell structure;

[0040] (6...

Example Embodiment

[0050] Example 1

[0051] FIG. 1 is a schematic diagram of an axial cross-section of a unit cell structure of each layer with an axial gradient in an embodiment provided by the present invention. Where H is the height of the unit cell structure, which also determines the height of the core layer where the unit cell structure is located, D 1 Is the outer diameter of the bottom of the unit cell structure, D 2 Is the outer diameter of the top of the unit cell structure, t 1 Is the bottom wall thickness of the unit cell structure, t 2 The top wall thickness of the unit cell structure. The hollow cone tubes A and B given in the figure are based on t 1 And t 2 As a variable, the designed axial gradient unit cell structure; the hollow cone C is at t 1 And t 2 When equal, the radial gradient unit cell structure is designed by laying 3 layers of different materials.

[0052] Refer to Figure 1. The relative density of the unit cell structure can be designed by adjusting any parameters. The h...

Example Embodiment

[0065] Example 2

[0066] 2 is a schematic diagram of the axial cross-section of the unit cell structure of each layer with an axial gradient in another embodiment provided by the present invention. The meaning of the parameter is the same as that in Figure 1. The hollow tube E is t 1 And t 2 As a variable, the designed axial gradient unit cell structure; the hollow tube F is at t 1 And t 2 When equal, the radial gradient unit cell structure is designed by laying 3 layers of different materials.

[0067] Refer to Figure 2. The relative density of the composite unit cell structure can be designed by adjusting any parameters. The hollow tube F given in Figure 2 is at t 1 And t 2 When equal, the radial gradient unit cell structure is designed by laying 3 layers of different materials. The multi-layer double gradient energy-absorbing and vibration-damping sandwich structure prepared by assembling and fixing the unit cell and the panel is shown in Figure 4(b).

[0068] Therefore, the pre...

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Abstract

The invention provides a metal/composite material multilayer double-gradient energy-absorbing vibration-damping sandwich structure and a preparation method thereof. The metal/composite material multilayer double-gradient energy-absorbing vibration-damping sandwich structure comprises panels and a core layer arranged between the panels, the core layer consists of a unit cell structure, the unit cell structure is a thin-wall hollow tubular structure, and the wall thickness of the unit cell structure is in axial gradient change and/or the cell wall density is in radial gradient change. Core layerunit cell configuration gradients are integrated, the unit cell configuration gradients are realized by designing the unit cell height, the cell wall thickness, radial mixing of different materials and the like, and the multilayer sandwich structure with double gradients is formed in combination with structure gradients. The structure design and the preparation method provided by the invention are simple, the unit cell shape designability is strong, and an interlayer gap provides a space for embedding a multifunctional material. When the structure is subjected to vibration impact, the advantages of unit cell configuration gradients can be played, vibration propagation is isolated or attenuated through impedance mismatch, and more energy is absorbed through elastic-plastic deformation.

Description

technical field [0001] The invention relates to a sandwich structure and a preparation method thereof, in particular to a metal / composite material multi-layer double-gradient energy-absorbing vibration-reduction sandwich structure and a preparation method thereof. Background technique [0002] Functionally graded materials refer to the continuous gradient change of the chemical composition, microstructure and atomic arrangement of the material from one side to the other, so that the properties and functions of the material are continuously changed in a gradient. Guided by the idea of ​​bionics, functionally graded materials have developed from a simple solid gradient laminate to a sandwich structure with multiple functions such as temperature control and heat insulation, sound absorption and vibration reduction, impact and explosion protection, such as low density, high specific stiffness, Honeycomb sandwich structure and lattice sandwich structure with many advantages such ...

Claims

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Application Information

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IPC IPC(8): B32B3/08B32B9/00B32B9/04B32B17/02B32B17/12B32B27/02B32B27/12B32B27/34B32B5/14B32B7/022B32B7/03B32B15/01B32B37/02B32B37/06B32B37/10B32B37/12B32B38/18B29C70/68B29C70/88G10K11/162
CPCB29C70/686B29C70/88B32B3/085B32B5/02B32B5/08B32B5/142B32B5/26B32B7/02B32B15/01B32B37/02B32B37/06B32B37/10B32B37/1284B32B38/1816B32B2250/03B32B2250/04B32B2250/05B32B2250/20B32B2262/0269B32B2262/101B32B2262/106B32B2262/14B32B2307/102B32B2307/56B32B7/03G10K11/162
Inventor 杨金水李爽吴林志陈思远张伟明杨访曲嘉杨丽红
Owner HARBIN ENG UNIV
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