Today, we will learn about the application of chopped carbon fiber in automobiles.

Chopped carbon fiber is a new type of fiber material with high strength and high modulus fiber with carbon content above 95%. It is a microcrystalline graphite material obtained by stacking organic fibers such as flake graphite crystallites along the axial direction of the fiber and carbonizing and graphitizing. Carbon fiber chopped strand is a new material with excellent mechanical properties. Its specific gravity is less than 1/4 of steel. The tensile strength of carbon fiber resin composites is generally above 3500Mpa, which is 7~9 times that of steel. The amount is 23000~43000Mpa and is also higher than steel. However, the carbon fiber material only exhibits high strength along the fiber axis direction, and its impact resistance is poor, and it is easy to be damaged. Therefore, when manufacturing into a structural component, it is often used to take advantage of its light-resistance and avoid side impact. part.

With the academic research from short-fiber carbon fiber to long-fiber carbon fiber, technologies and products using carbon fiber to make heating materials have gradually entered the civilian field. Automotive carbon fiber composites can be used as parts for automotive drive shafts, leaf springs, frames and brake pads. At present, steel materials account for about 3/4 of the weight of the car body. If the steel parts of the car are all replaced by carbon fiber composite materials, the weight of the car body can be reduced by 300kg, the fuel efficiency can be increased by 36%, and the carbon dioxide emissions can be reduced by 17%.

1. Automotive body and chassis applications, due to the sufficient strength and rigidity of the chopped carbon fiber reinforced polymer matrix composite, is the lightest material for the main structural parts such as automobile bodies and chassis. It is expected that the application of carbon fiber composite materials can reduce the quality of automobile body and chassis by 40% to 60%, which is equivalent to 1/3 to 1/6 of the quality of steel structure. The common racing car body and some modified car bodies are all for this purpose, and the visual effect is excellent and very cool.

2. For the application of brake pads, chopped carbon fiber is also applied to the brake pads because of its environmental protection and wear resistance. However, the products containing carbon fiber composite materials are expensive, so the brake pads are mainly used in high-end cars. Carbon fiber brake discs are widely used in racing cars, such as F1 racing cars. It can reduce the speed of the car from 300 km/h to 50 km/h within a distance of 50 m. At this time, the temperature of the brake disc will rise above 900 °C, and the brake disc will change due to the absorption of a large amount of heat. red. The carbon fiber brake disc can withstand temperatures up to 2 500 °C and has excellent braking stability.

3 Wheel hub application, wheel hub manufacturer's wheel series, with 2 piece design, outer ring made of carbon fiber material, inner hub is lightweight alloy, with stainless steel screw, 40% lower quality than common size wheel about. For example, a 20-inch wheel hub has a mass of 6 kg, while a typical hub weighs about 18 kg.

4. The application of the transmission shaft, the stress of the automobile transmission shaft is relatively complicated, especially to bear a large torque, fully considering the characteristics of the anisotropy, high specific strength and relatively low specific modulus of the chopped carbon fiber reinforced composite material. Thus, the use of chopped carbon fiber reinforced composite drive shafts can replace metal products to meet the requirements of use. The carbon fiber drive shaft not only reduces weight by 60%, but also has better fatigue resistance and durability.

The application of chopped carbon fiber filaments in automobiles can meet the global demand for energy saving and emission reduction, as well as the fuel economy problem of satisfying the public's relationship, as long as it is to achieve the weight reduction of automobiles and meet the demand for sufficient rigidity of automobiles. carbon fiber materials can be used as the mainstream material for future cars, but the drawbacks of excellent products are that the cost is too high, and the price of small components is maintained at 10,000 yuan, so as long as the cost can be reduced, carbon fiber materials can become mainstream materials.

Yancheng Xiangsheng Carbon Fiber Technology Co., Ltd. is a registered trademark of “Xiangli”. It has independently developed a complete set of rotorcraft aircraft, landing gear, agricultural and forestry plant plant protection spray system, seaplane float, wind-driven ship, aviation communication helmet, plastic reinforcement. Carbon fiber, carbon fiber powder for friction materials, chopped carbon fiber for brake system, and carbon fiber rope, carbon fiber cloth, carbon fiber physiotherapy cushion, carbon fiber filament special fiber cutting machine, etc.