Carbon fiber is a microcrystalline graphite material obtained by carbonizing and graphitizing organic fibers. The carbon fiber has a microstructure similar to that of artificial graphite and is a layered graphite structure.
Carbon fiber 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, 7~9 times that of steel, and the tensile modulus is 230. ~430Gpa is also higher than steel. Therefore, the specific strength of CFRP, that is, the ratio of the strength of the material to its density can reach 2000Mpa/(g/cm3) or more, while the specific strength of A3 steel is only about 59Mpa/(g/cm3), and the specific modulus is also higher than that of steel. The higher the specific strength of the material, the smaller the self-weight of the component, and the higher the specific modulus, the greater the rigidity of the component. In this sense, the broad application prospect of carbon fiber in engineering has been predicted.
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