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Carbon fiber (CF) is a new type of fiber with high strength and high modulus with carbon content of more than 95%. It is a kind of microcrystalline graphite material which is made of organic fibers such as flake graphite microcrystalline and other organic fibers stacked along the axial direction of the fiber, and is obtained by carbonization and graphitization. Carbon fiber is "flexible and internal rigid", which is lighter than aluminum, but its strength is higher than that of steel, and has the characteristics of corrosion resistance and high modulus. It is important data in national defense, military industry and civil. It not only has the inherent characteristic of carbon data, but also has the soft processability of textile fiber, and is a new generation of reinforced fiber.
Carbon fiber has many excellent functions, such as high axial strength and modulus, low density, high specific function, no creep, high temperature resistance and good fatigue resistance in non oxidation environment. The specific heat and conductivity are between non-metal and metal, and the thermal expansion coefficient is small and has anisotropy, corrosion resistance is good, and X-ray transmission is good. Excellent conductive and heat conduction function, good electromagnetic shielding, etc. Compared with traditional glass fiber, the young's modulus is more than three times that of carbon fiber; compared with Kevlar fiber, Young's modulus is about twice as much as that of the fiber, and it is insoluble and non swelling in organic solvent, acid and alkali, and has excellent corrosion resistance.
After carbon fiber is applied to the car, the most obvious advantage to the car manufacturing is the lightweight of the car, and the most direct impact is the progress of energy saving, acceleration and braking function. Generally speaking, the vehicle weight is reduced by 10%, the fuel consumption is reduced by 6% - 8%, the emission is reduced by 5-6%, the acceleration of 0-100km/h is improved by 8-10%, and the braking interval is shortened by 2-7m. The vehicle body lightweight can make the center of gravity of the vehicle move down, improve the stability of the car operation, and the operation of the vehicle will be more safe and stable. The carbon fiber composite data has excellent energy absorption rate, and the energy absorption ability of collision is six to seven times of steel and three to four times of aluminum, which further ensures the safety of the car.
The carbon fiber composite data has higher vibration damping. It takes 9 seconds for light alloy to stop vibration, and the carbon fiber composite data can be stopped in 2 seconds. Therefore, carbon fiber is applied to the car. The progress and dedication of NVH (noise, vibration and acoustic vibration roughness) of the whole vehicle are also great, which will greatly enhance the comfort of the car. The fatigue strength of steel and aluminum is 30-50% of tensile strength, while the carbon fiber composite data can reach 70-80%, so the fatigue reliability of the data using carbon fiber composite data on the car has made great progress.
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Ms. chen
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April 06, 2021
July 08, 2021
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Ms. chen
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April 06, 2021
July 08, 2021
Ms. chen
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