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Auto front anti-collision beam made of carbon fiber/aramid fiber reinforced material

A technology for reinforcing composite materials and front anti-collision beams, which is applied in synthetic resin layered products, bumpers, layered products, etc. Vehicle safety, improving strength and toughness, overcoming brittleness

Active Publication Date: 2015-07-01
南通南京大学材料工程技术研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, carbon fiber composite materials have been used in automotive hoods, fenders and other structural parts. Because carbon fiber composite materials are brittle and difficult to repair after damage, the application of carbon fiber composite materials in the automotive field is limited to a certain extent.
Aramid fiber also has high specific strength, and can complement carbon fiber in terms of toughness, which can solve the shortcomings of carbon fiber composite materials that are brittle and easy to break after impact to a certain extent. If a composite material with a carbon fiber / aramid fiber hybrid structure can be developed, It is expected to solve the contradiction between the strength and toughness of the composite materials used in automobiles
[0004] Most of the existing methods for improving the strength and toughness of the anti-collision beam of automobiles are to improve the structure of the anti-collision beam, and the improvement of the material is less, such as a kind of anti-collision beam for automobiles disclosed in Chinese patent ZL201120345499.1; It has an integrated aluminum alloy structure, with A circular guide angles on the upper and lower corners of the right part, and two cavities inside; the anti-collision beam is processed from aluminum alloy extrusions, and the material is aluminum alloy. The weight is lower than the traditional steel metal anti-collision beam, but it is still heavier

Method used

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  • Auto front anti-collision beam made of carbon fiber/aramid fiber reinforced material
  • Auto front anti-collision beam made of carbon fiber/aramid fiber reinforced material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] like figure 1 and figure 2 As shown, the automobile front crash beam prepared by carbon fiber / aramid fiber reinforced composite material of the present invention includes a basic frame 4 with two cavities 5, and the material of the basic frame 4 is a first restraint layer 1 containing aramid fibers. , a carbon fiber / aramid reinforced resin-based composite material composed of a second constraining layer 3 containing aramid fibers and an intermediate layer 2 containing carbon fibers located between the first constraining layer 1 and the second constraining layer 3; The cavity 5 is filled with rigid foam, and the rigid foam is adjacent to the second constraining layer 3 .

Embodiment 2

[0028] Using the prepreg layup-autoclave co-curing molding process, as the first constraining layer, a layer of aramid fiber cloth (Beijing Juneng, JNAFS-1670-170P plain weave cloth) was laid on two pieces of aramid fiber cloth that were on the same plane and On the PMI foam (Evonik Rohacell 51IG PMI) of 30mm×30mm×1200mm (length×width×thickness) arranged at parallel intervals along the length of the foam, according to figure 1 The structure shown is in turn covered with unidirectional carbon fiber epoxy resin prepreg (Guangwei USG12503) on the above aramid fiber cloth. 2s , and 1 layer of aramid fiber cloth (Beijing Juneng, JNAFS-1670-170P plain weave) as the second constraining layer. After heating and curing at 120°C for 2 hours and 160°C for 1 hour, a car front crash beam sample prepared by the carbon fiber / aramid reinforced composite material having the structure of Example 1 was obtained. Among them, the volume percentage composition of the carbon fiber / aramid reinforced...

Embodiment 3

[0031]The carbon fiber / aramid fiber reinforced composite material basic skeleton 4 with two cavities is prepared by the prepreg layup-autoclave co-curing molding process, and the PMI foam is filled in the cavity 5 through epoxy adhesive bonding. Including: as the first constraining layer, a layer of aramid fiber cloth (Beijing Juneng, JNAFS-1670-170P plain weave) is laid on the mold, and the mold is provided with the cavity size consistent with the cavity 5 on the basic skeleton 4 30mm×30mm×1200mm (length×width×thickness), according to figure 1 As shown in the structure, unidirectional carbon fiber epoxy resin prepreg (Guangwei USG12503) is layered on the above aramid fiber cloth in turn, and the layering method[0] 8 , and 1 layer of aramid fiber cloth (Beijing Juneng, JNAFS-1670-170P plain weave) as the second constraining layer. After 2 hours at 120°C and 1 hour at 160°C for heating and curing, the basic skeleton 4 of the carbon fiber / aramid reinforced composite material wa...

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Abstract

The invention discloses an auto front anti-collision beam made of a carbon fiber / aramid fiber reinforced material. The auto front anti-collision beam comprises a basic framework with a plurality of cavities, wherein the basic framework is made of a carbon fiber / aramid fiber reinforced material consisting a first restraint layer containing aramid fibers, a second restraint layer containing aramid fibers and a middle layer arranged between the first restraint layer and the second restraint layer and containing carbon fibers, and the cavities of the basic framework are filled with hard foam. Compared with the common auto anti-collision beam made of steel, the auto front anti-collision beam provided by the invention has the characteristics of low specific gravity, high strength and high toughness; and the weight is lowered by 50-80% on the condition that the strength is doubled or tripled, so the safety of an automobile is improved and the effects of energy conservation and emission reduction are achieved.

Description

technical field [0001] The invention relates to an automobile anti-collision beam composite material structure, in particular to an automobile front anti-collision beam prepared from a carbon fiber / aramid fiber reinforced composite material. Background technique [0002] The rapid development of the automobile industry in recent years has continuously increased the number of automobiles, but also brought about problems such as fossil energy consumption, exhaust emission pollution, and traffic safety. The energy saving, environmental protection and safety of automobiles have become the future development trend of the global automobile industry and the direction of my country's automobile industry policy. Reducing fuel consumption and reducing exhaust emissions have become the key issues that need to be solved urgently for the sustainable development of the automobile industry. Lightweight automobiles are one of the most effective ways to reduce energy consumption, and it is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R19/22B32B27/02B32B27/12B32B9/04B32B1/06
Inventor 任华孟祥康薛新斌仇叶云
Owner 南通南京大学材料工程技术研究院
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