The composite material has a flexible molding process, and its structure and performance are highly designable. The use of one-step molding method to manufacture various components can improve the structural strength, and the performance of different parts of the component can be improved through the design of fiber types and different arrangements. By adjusting the composition, composition and arrangement of the components of the composite material, the components can not only bear different forces at different positions, but also can be made into composite multi-functional products with contradictory properties such as rigidity, toughness and plasticity. They are all advantages that traditional materials do not have. In the application technology of composite material evacuation platform and cable support, the “designability” of composite material performance plays a big role.
However, the corrosion resistance of the metal materials used in the past has been difficult to solve. For example, various metal cable supports and components are corroded by humid environments, acid rain, and salt spray. The corrosion hazard is more obvious when applied to the underground environment of Guangzhou with obvious oceanic climate. Coupled with the stray current corrosion of subway engineering, the service life of metal materials is greatly reduced.
The composite manhole cover has high strength, low price and beautiful appearance. It can be colored arbitrarily, is easy to install, maintain, and identify. Because it has no recycling value, it completely solves the problem of anti-theft. my country will gradually switch to composite manhole covers in the next three to five years, with unprecedented market potential.
In composite materials, fiber reinforced materials are widely used and used in a large amount. For example, carbon fiber and epoxy resin composite materials have specific strength and specific modulus several times larger than steel and aluminum alloys. They also have excellent chemical stability, friction reduction, wear resistance, self-lubrication, heat resistance, fatigue resistance, and Creep, noise reduction, electrical insulation and other properties. The composite of graphite fiber and resin can obtain a material whose expansion coefficient is almost equal to zero. Another feature of fiber reinforced materials is anisotropy, so the fiber arrangement can be designed according to the strength requirements of different parts of the part. The aluminum-based composite material reinforced with carbon fiber and silicon carbide fiber can still maintain sufficient strength and modulus at 500°C.