Wide range of carbon fiber used

When it comes to carbon fiber, many people will feel strange and familiar. What is familiar is that the material of carbon fiber can be heard everywhere, but what is unfamiliar is the specific application of carbon fiber, and it is difficult to say it at once.

In fact, in the large family of composite materials, fiber reinforced materials have always been the focus of attention. Since the advent of glass fiber reinforced plastic composite with glass fiber and organic resin, carbon fiber, ceramic fiber and boron fiber reinforced composites have been successfully developed, the properties have been continuously improved, and the application of carbon fiber has been expanded.

What is carbon fiber?
Carbon fiber is transformed from organic fiber through a series of heat treatment, and the inorganic high-performance fiber with carbon content more than 90% is a new material with excellent mechanical properties and inherent characteristics of carbon materials. it also has the soft processability of textile fiber, and is a new generation of reinforced fiber material.
In popular terms, carbon fiber is a new composite material constructed by carbonization of ordinary fiber reinforced plastics.

02 properties of carbon fiber.
Six or seven pieces of this material are tied together to make it as thin as a hair.
It is such a fine material that its specific gravity is less than 1x4 of steel, but its hardness is eight or nine times that of steel, and it can be deformed at will.
The tensile strength of carbon fiber resin composites is generally higher than 3500Mpa, which is 7 to 9 times that of steel, and the tensile elastic modulus of 23000~43000Mpa is also higher than that of steel.

Carbon fiber has the characteristics of general carbon materials, such as high temperature resistance, friction resistance, electrical conductivity, thermal conductivity and corrosion resistance, but different from ordinary carbon materials, carbon fiber has remarkable anisotropy, softness and can be processed into all kinds of fabrics. it shows high strength along the fiber axis.

The main constraint to the large-scale use of this material is due to its overly complex technological process and raw materials that drive up the price, and although the material is good, it also has a fatal defect-carbon fiber is unrepairable.

This makes the already expensive carbon fiber creation as fragile as a work of art, like the carbon fiber parts in a sports car, the damage is irreparable and can only be replaced in a complete set.

03 application of carbon fiber.
The main use of carbon fiber is to make structural materials by compounding with resins, metals, ceramics and other substrates.

The comprehensive indexes of specific strength and specific modulus of carbon fiber reinforced epoxy resin composites are the highest among the existing structural materials.

Carbon fiber composites have advantages in fields with strict requirements such as density, stiffness, weight and fatigue characteristics, and in situations where high temperature and high chemical stability are required.

Carbon fiber was produced in the early 1950s to meet the needs of cutting-edge science and technology such as rocket, aerospace and aviation, and it is also widely used in sports equipment, textile, chemical machinery and medical fields.

With the increasingly stringent requirements of cutting-edge technology on the technical performance of new materials, scientific and technological workers are urged to make continuous efforts to improve.

In the early 1980s, high-performance and ultra-high-performance carbon fiber appeared one after another, which is another leap in technology, but also indicates that the research and production of carbon fiber has entered an advanced stage.

The composite material composed of carbon fiber and epoxy resin has become a kind of advanced aerospace material because of its low specific gravity, good rigidity and high strength.

Because for every 1 kg reduction in the weight of the spacecraft, the launch vehicle can be reduced by 500 kg.

Therefore, advanced composite materials are being used in aerospace industry. There is a vertical take-off and landing fighter, which uses carbon fiber composites that account for 1x4 of the weight of the aircraft and 3 of the weight of the wing.
Nowadays, the main application in the field of aerospace is still in the field of industrial civil aircraft, on the one hand, the aircraft is not easy to be damaged, on the other hand, the damage of the aircraft must be replaced as a whole, and its light weight and high hardness have been brought into full play.
In F1 (World Formula one Championship), most of the body structure is made of carbon fiber.
One of the selling points of top sports cars is also the use of carbon fiber all over the body to improve aerodynamics and structural strength.
Like the interior of a sports car, the cockpit is generally made of carbon fiber, even if the car has a major accident, the general shell is damaged, the cockpit can be kept intact.

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