Application of carbon fiber in automobile
We have a better understanding of the shell of a car, some people think that the automobile body shell known as iron is iron, but iron is not confined to the iron alloy, many brands using the body shell Aluminum Alloy high toughness materials or carbon fiber materials. For Aluminum Alloy plastic and carbon fiber may better understand, although not what new material but few know of him, but some owners in the refit, in the shell of a car or decorations affixed with a thin layer of imitation carbon fiber film. Speaking of carbon fiber make people immediately associate to the tall on the car and I think that opens the application of carbon fiber material is not high-end car car track racing, there is a private custom and fancier car modification. Why are carbon fiber materials so popular, what are its advantages?
Carbon fiber (carbon fiber, referred to as CF), is a carbon containing more than 95% of high strength, high modulus fiber new fiber materials. The graphite graphite material is formed by the stacking of organic fibers such as flake graphite crystallites along the axial direction of the fiber and processed by carbonization and graphitization. Carbon fiber is a new material with excellent mechanical properties, it is less than the proportion of steel 1/4, the tensile strength of carbon fiber resin composite materials are generally above 3500Mpa, is 7~9 times that of steel, tensile elastic modulus is higher than that of 23000~43000Mpa steel. But the carbon fiber material only along the fiber axis show a very high strength, the impact resistance is poor, easy to damage, so be in the manufacture of structural components is often used when its resistance to pull light advantage and avoid going to do part of the side impact.
As to the academic research of carbon fiber spun filament carbon fiber, making use of carbon fiber heating material technology and products have gradually entered the military and civil fields. The car with the carbon fiber composite material can be used as automobile transmission shaft, spring, frame and brake parts etc.. The iron and steel materials accounted for 3/4 of the weight of the body, if the steel parts of the car by the carbon fiber composite material replacement, body weight can be reduced 300kg, fuel efficiency increased by 36%, carbon dioxide emissions can be reduced by 17%.
1 automotive body and chassis applications, as carbon fiber reinforced polymer matrix composites have sufficient strength and stiffness, is the manufacture of automotive body and chassis and other major structural parts of the lightest material. It is expected that the application of carbon fiber composite can reduce the quality of automobile body and chassis by 40% ~ 60%, equivalent to 1/3 ~ 1/6 of steel structure quality. The common part of the car body, vehicle modifications are also excellent for the visual effect is very cool.
The application of the 2 brake sheets, carbon fiber but also because of the characteristics of environmental protection and the application of wear on the brakes, but the product containing carbon fiber composite materials have high price, so the brake is mainly used in high-grade car. Carbon fiber brake discs are widely used in racing vehicles, such as F1 racing. It can reduce the speed of the car from 300 km/h to km/h at a distance of in the range of 50m, the temperature of the brake disc will rise to above 900 DEG C, and the brake disc will become red because of absorbing a lot of heat energy. Carbon fiber brake disc can withstand high temperature of 2500 degrees, and has excellent braking stability.
Application of 3 wheel hub, the German manufacturing experts launched a series of hub, take 2 chip design, the outer ring is made of carbon fiber material to create a hub for lightweight alloy, collocation stainless steel screws, 40% lower than the general quality of the same size around the hub. To 20 inch hub, for example, the hub quality of 6 kg, while the general hub about weight of 18 kg. British Kahm company uses CFRP made of RX-X advanced car special wheels, the quality is only 6 kg, can be high-speed, and can minimize the wheel radial inertia force. Developed by the British company DYMAG of the world's most light carbon fiber / magnesium wheels made of carbon fiber and magnesium wheel brake disc 2 composition, and use special hardware to connect ti.
The 4 transmission shaft application, the force of automobile transmission shaft is more complex, especially to withstand the large torque, fully consider the characteristics of carbon fiber reinforced composite material anisotropy, high strength and modulus is relatively low, so the use of carbon fiber reinforced composite transmission shaft can replace the metal products, to meet the use requirements. Carbon fiber transmission shaft not only reduces the weight of 60%, but also has better fatigue resistance and durability.
Automotive applications of carbon fiber as long as it is for the realization of lightweight vehicles can also meet the vehicle rigid demand enough, not only can achieve the global demand for energy saving and emission reduction, but also to meet the public problems of public relations to meet fuel. Carbon fiber material can be used as main material of future car, but a good product has its drawbacks is that the cost is too high, small parts prices are maintained in the million, so as to reduce the cost of carbon fiber materials will become the mainstream of materials.
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