Key to the use of carbon fiber bumper
The traditional carbon fiber car accessories bumper is usually made of steel materials. However, with the increase of fuel price and the limitation of exhaust emissions, the light weight development direction of car manufacturing also puts forward new requirements for the raw materials of bumper.
The carbon fiber composite data can be used instead of traditional metal data, which can reduce the weight of the car body, save fuel and reduce the exhaust emissions. This is not only the consensus of the industry, but also the result of the deepening of the use.
The use of carbon fiber car accessories is various: from the interior panel, body cover, engine cover, door, frame, bumper, spoiler, transmission shaft, brake friction pad, seat, hub, fuel storage tank, etc., the carbon fiber composite data is no longer rare.
When the car is bumping at high speed, the bumper beam and energy absorbing bracket are the primary parts to play an important role. So, how to use carbon fiber composite data instead of steel data to make car bumper parts? What are the key points to master in use?
Carbon fiber car accessories - bumper beams are not thicker as possible:
Theoretically, the energy absorbed by bumper system is proportional to the thickness of carbon fiber composite data. The thicker the data, the more energy absorption. With the increase of thickness, the maximum deformation of bumper beam will decrease and the reduction will be smaller and smaller. But the test results show that the acceleration value of the pendulum increases with the increase of thickness, which will lead to the increase of impact force between the skin and the pendulum. Therefore, the thickness of the bumper beam of carbon fiber car parts must be controlled within a certain range.
carbon fibre
The effect of carbon fiber bumper system:
The carbon fiber composite bumper beam can absorb the same energy of the steel bumper beam, but because the rigidity of the carbon fiber composite data is larger than that of steel, the deformation of the bumper beam of carbon fiber composite data will be smaller than that of the steel data bumper beam, and the overall function of the bumper beam will be better.
When carbon fiber composite data is used for energy absorbing bracket, the maximum deformation of bumper beam and the maximum acceleration of pendulum are similar to those of steel data, but the quality of carbon fiber support is reduced by 66% at least, and the lightweight effect is very considerable.
Pay attention to the laying planning of carbon fiber composite data:
Because of the different orientation of carbon fiber, the energy absorption characteristics of carbon fiber will be different. The laminated board of carbon fiber composite materials is made of single layer board. The laminated plate is generally composed of fiber layers in different directions to satisfy the different strength and rigidity requirements in different directions, so the main direction of each layer of data is different. From then on, the layout of the layer, such as the angle of the layer, the percentage of the corner layers and the sequence of the layers, has a direct impact on the strength, rigidity and stability of the composite structure.
The influence of carbon fiber car accessories can not be underestimated:
In addition to bumper beam, smart new materials also emphasize the effect of energy absorption bracket in high-speed bump. It is believed that when most of the energy is absorbed by the energy absorbing bracket, the bumper beam can only absorb a few energy. It is proved that when the thickness of carbon fiber composite data used for energy absorbing support reaches 3mm, the energy absorption effect of the system is better than that of the steel data bumper system.
Especially, compared with low-speed bumping, the advantages of the bumping function of the carbon fiber composite bumper system are more obvious in the high-speed bumping.
