A metal/composite material multi-layer double-gradient energy-absorbing vibration-damping sandwich structure and its preparation method
A technology of composite materials and sandwich structures, applied in metal layered products, chemical instruments and methods, synthetic resin layered products, etc., can solve the problem that the interlayer unit cell structure does not have a functional gradient effect, etc.
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[0034] A method for preparing a metal / composite multi-layer double-gradient energy-absorbing 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 the rolling and cutting process;
[0036] (2) Prepare the metal / composite material panel required by the multi-layer double-gradient energy-absorbing and vibration-absorbing sandwich structure, and polish and clean the surface;
[0037] (3) Design and manufacture the molds required for the unit cell structure of composite materials;
[0038] (4) Roll composite material prepregs with different gradient configurations on the mold, close the mold, heat and pressurize to a suitable temperature and pressure, and keep it for a period of time;
[0039] (5) cooling to room temperature, demolding after depressurization, cutting and polishing the end of the gradient unit ...
Embodiment 1
[0051] Fig. 1 is a schematic axial cross-sectional view of each layer of unit cell structure with an axial gradient in an embodiment provided by the present invention. Among them, 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 wall thickness at the bottom of the unit cell structure, t 2 is the top wall thickness of the unit cell structure. The hollow conical tubes A and B given in the figure are t 1 and t 2 As a variable, the designed axial gradient unit cell structure; the hollow conical tube C is at t 1 and t 2 When equal, by laying 3 layers of different materials, the radial gradient unit cell structure is designed.
[0052] Referring to Fig. 1, the relative density of the unit cell structure can be designed by adjusting any parameters. ...
Embodiment 2
[0065] Fig. 2 is a schematic axial cross-sectional view of each layer of unit cell structure with an axial gradient in another embodiment provided by the present invention. The meaning of the parameters is the same as that in Figure 1, and 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, by laying 3 layers of different materials, the radial gradient unit cell structure is designed.
[0066] Referring to Fig. 2, the relative density of the composite unit cell structure can be designed by adjusting any parameters. The hollow tube F given in Fig. 2 is at t 1 and t 2 When equal, by laying 3 layers of different materials, the radial gradient unit cell structure is designed. 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 Fig. 4(b).
[0067] Therefore, the preparation ...
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