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Sandwich damping composite material

A damping composite material and composite material technology, applied in the direction of synthetic resin layered products, layered products, rubber layered products, etc., can solve the problems of high cost, decreased mechanical properties, difficult promotion and application, etc., and achieve good vibration reduction Effects of performance, low mass and high structural damping

Active Publication Date: 2011-09-14
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The damping composite material produced by the above method has relatively good damping performance, but the mechanical performance drops very seriously and cannot be used as a structural material; (2) The damping performance of the composite material is improved by laying up the design, such as using better damping performance Kevlar fiber and glass fiber with better mechanical properties are mixed
These composite material damping treatment technologies have the disadvantages of difficulty in achieving the unity of mechanical properties and damping properties, high cost, etc., and it is difficult to promote and apply

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] structure see figure 1 .

[0018] (1) Structural layer

[0019] Resin formula (percentage by weight): 100 parts of E51 epoxy resin, 25 parts of T-31 curing agent, 5-10 parts of 501 thinner, and 1-5 parts of DMP-30 accelerator.

[0020] The reinforcement material is satin high-strength glass fiber fabric. Fiber content (weight percent): 55%, the thickness of the upper and lower structural layers is 3.5mm.

[0021] Curing method: curing at room temperature for 24 hours, post-curing at 80°C for 5 hours.

[0022] (2) sandwich layer

[0023] The sandwich layer adopts a density of 500Kg / m 3 Polyurethane foam with a thickness of 15mm.

[0024] (3) Damping layer

[0025] The damping layer adopts 3M company's acrylic rubber damping material with a thickness of 0.5mm.

[0026] (4) Performance test

[0027] The bending stiffness and vibration performance of this structural material are tested, and the frequency response test acceleration total vibration level is compared ...

Embodiment 2

[0031] structure see figure 2 .

[0032] (1) Structure layer

[0033] Resin formula (parts by weight): 100 parts of DER331 epoxy resin, 80 parts of methyl tetrahydrophthalic anhydride curing agent.

[0034] The reinforcement material is MW220 high modulus glass fiber fabric. Fiber content (percentage by weight): 40%, the thickness of the upper and lower structural layers is 1.5mm.

[0035] Curing method: curing at 80°C for 3 hours, post-curing at 120°C for 5 hours.

[0036] (2) sandwich layer

[0037] The sandwich layer adopts a density of 300Kg / m 3 Polyurethane foam with a thickness of 10mm.

[0038] (3) Damping layer

[0039] The damping layer adopts 3M's acrylic rubber damping material with a thickness of 0.3mm.

[0040] (4) Performance test

[0041] The bending stiffness and vibration performance of this structural material are tested, and the frequency response test acceleration total vibration level is compared with the sandwich composite material without dampi...

Embodiment 3

[0045] structure see figure 2 .

[0046] (1) Structural layer

[0047] Resin formula (parts by weight): 100 parts of Hexion RIM135 low-viscosity epoxy resin, 30 parts of RIMH137 supporting curing agent.

[0048] The reinforcement material is 0° / 90° biaxial high-strength glass fiber fabric. Fiber content percentage by weight: 70%, and the thickness is 2mm for the upper and lower layers.

[0049] Curing method: curing at room temperature for 24 hours, post-curing at 60°C for 5 hours.

[0050] (2) sandwich layer

[0051] The sandwich layer adopts a density of 80kg / m 3 PVC foam with a thickness of 15mm.

[0052] (3) Damping layer

[0053] The damping layer is made of 1152 nitrile rubber damping material with a thickness of 0.05mm.

[0054] (4) Performance test

[0055] After curing, the bending stiffness and vibration performance of this structural material were tested, and the frequency response test acceleration total vibration level was compared with the sandwich comp...

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Abstract

The invention discloses a sandwich damping composite material. The material comprises an outer layer, an inner layer and a damping layer, wherein the outer layer of the material is a structural layer made of a fiber reinforced resin-based composite material; the inner layer of the material is a sandwich layer consisting of closed-cell rigid foam; the damping layer is positioned between the structural layer and the structural layer or between the structural layer and the sandwich layer; a sandwich structure is formed by the outer layer and the inner layer of the material to improve the integral rigidity and strength of the material and achieve the certain effect of reducing vibration; the sandwich layer has weight reduction, heat preservation and sound insulation effects and can meet different requirements; and the damping layer improves the structural damping of the material. The material overcomes the defects that the mechanical property and damping property of the conventional damping composite material cannot be unified, and popularization is not facilitated due to high cost, and has high structural damping on the basis of having high rigidity and strength so as to have high vibration reducing property.

Description

[0001] technical field [0002] The invention relates to a non-metallic damping material, in particular to a sandwich damping composite material. Background technique [0003] The existing damping composite material technologies include the following: (1) Improving the damping performance of the composite material by damping modified resin, Japanese patent JP61.287.934 discloses a damping composite material directly made of damping unsaturated resin , the glass transition temperature of the resin is 3°C, and the reinforcing material is a pre-invasion material made of non-woven fabric. The loss factor of the composite material is as high as 0.32 at 0°C and 500Hz. In addition, European patent EP0337443 A1 discloses a damping composite material, the resin matrix of which is synthesized by xylylene diamine and α-end linear aliphatic dibasic ester, referred to as "MX nylon", and the reinforcing material is glass fiber. The damping composite material produced by the above method ...

Claims

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Application Information

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IPC IPC(8): B32B25/08B32B27/04B32B27/26B32B27/38
Inventor 冀冰郭万涛吴医博
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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