Composite Materials are a combination of materials with a matrix and a reinforcement. All kinds of materials cooperate with each other in performance, resulting in synergistic effect, which makes the comprehensive performance of composite materials meet many different requirements than the original composition materials. Matri x materials can be divided into two categories: metal and nonmetal. Commonly used in metal matrix aluminum, magnesium, copper, titanium and their alloys. Mainly synthetic resin, rubber, ceramics, graphite, carbon and other non-metallic matrix. Mainly reinforced glass fiber, carbon fiber, boron fiber, aramid fiber, silicon carbide fiber, asbestos fiber, whisker, metal wire and so on are thin and hard.

The use of composite materials can be traced back to ancient history. The use of straw and clay has been strengthened since ancient times, and two kinds of composite materials formed by reinforced concrete have been used for centuries. In the 1940s, due to the needs of the aviation industry, glass fiber reinforced plastics (commonly known as glass fiber reinforced plastics) were developed, hence the name of a composite material. Since 1950s, high strength and high modulus fibers such as carbon fiber, graphite fiber and boron fiber have been developed. Aramid fiber and silicon carbide fiber in the 1970s. These high-strength, high-modulus fibers are compounded with synthetic resin, carbon, graphite, ceramics, rubber and other nonmetallic matrices or metal matrices such as aluminum, magnesium and titanium, which constitute the characteristics of composite materials.

[Edit this paragraph] Classification

It is a mixture of composite materials. Composite materials are divided into metal and metal composite materials, nonmetal composite materials and metal, nonmetal and nonmetal composite materials. According to its structural characteristics, it can be divided into: ① fiber composite materials. The human body will be placed in various fiber-reinforced matrices.