Carbon fiber composite materials are mainly used in automobiles. Carbon fiber is a new type of fiber material with high-strength and high-modulus fibers containing more than 95% carbon. It is a microcrystalline graphite material obtained by stacking organic fibers such as flake graphite microcrystals along the axial direction of the fiber, and carbonization and graphitization. Carbon fiber is a new material with excellent mechanical properties. Its specific gravity is less than 1/4 of that of steel. The tensile strength of carbon fiber resin composites is generally above 3500Mpa, which is 7 to 9 times that of steel, and its tensile elastic modulus is 23000. ~43000Mpa is also higher than steel. Followed by Xiao Bian together to understand the performance and shortcomings of carbon fiber composites .
Carbon fiber composite properties
Carbon fiber-reinforced composites, unlike other FRP composites using conventional fibers such as glass fibers or aramid fibers, have excellent properties including: • Light weight – Traditional glass fiber-reinforced composite materials use continuous glass fibers The content is 70% (weight glass/total weight) and the density per cubic inch is usually 0.065 pounds.
High strength - Although lightweight, CFRP composites have higher strength and greater hardness per unit weight of CFRP composite than glass fiber composites. When compared with metal materials, this advantage is more prominent. For example, experience tells us that CFRP material is only one-fifth the weight of steel under equal strength conditions compared to steel. It can be imagined why all automakers are studying the use of carbon fiber instead of steel to improve their performance.
When CFRP composites are compared with aluminum, one of the lightest metals, based on the basic assumption that an equal strength aluminum material weighs about 1.5 times that of carbon fiber. Of course, there are many other variables in the experiment, which may affect the comparison results. For example, the grade and quality of materials, compounding process, production process, fiber structure and quality also need to be taken into consideration.
Disadvantages of Carbon Fiber Composites
High cost - despite the excellent performance of CFRP composites, why is carbon fiber not widely used in product production? At present, the production cost of CFRP composites is too high. According to the current market conditions (supply and demand), the type of carbon fiber (Aerospace VS commercial grade), the size of the fiber bundle is different, and the price of the fiber is also cloudy. The price per pound of carbon fiber raw material ranges from 5 to 25 times the price of glass fiber. Compared with steel, the high cost of CFRP materials is even more prominent.
Conductivity - This can be used as an advantage for carbon fiber composites, and it can also be a drawback in practical applications. Carbon fibers are extremely conductive and glass fibers are insulating. Many products use glass fiber instead of carbon fiber or metal because they require strict insulation.
In the production of utilities, many products require the use of fiberglass. For example, the production of ladders uses glass fiber as a ladder because the possibility of electric shock is reduced when the fiberglass ladder is in contact with a power line. The carbon fiber ladder is highly conductive and the consequences are unimaginable.
Although the cost of carbon fiber composites remains high, with the advancement of science and technology, the emergence of more highly profitable products is just around the corner. Perhaps in the lifetime, we will hopefully witness the wide application of high-performance carbon fiber products in the consumer market, industrial production and automobile manufacturing.
Editor's summary: The performance and disadvantages of carbon fiber composites are introduced here, and we hope to be helpful to everyone. If you want to know more related information, you can pay attention to this website information.
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