Fiber-reinforced materials are widely used in composite materials, and the amount is large. For example, carbon fiber and epoxy resin composite materials have specific strength and specific modulus that are several times larger than steel and aluminum alloys. Creep, noise reduction, electrical insulation and other properties. Composite of graphite fiber and resin can obtain a material with an expansion coefficient 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 product. Aluminum-based composite materials reinforced with carbon fibers and silicon carbide fibers can still maintain sufficient strength and modulus at 500 ° C.
The composite material molding process is flexible, and its structure and performance have strong designability. Manufacture of various components by one-shot molding method can improve the structural strength, and the performance of different parts of the component can be improved by the type of fiber and the design of different arrangements. By adjusting the composition, composition, and arrangement of each component of the composite material, the component can not only bear different forces at different positions, but also can be made into a composite multifunctional product that has contradictory properties such as rigidity, toughness and plasticity. Corrosion hazards are more pronounced in underground environments where traditional materials do not have a clear marine climate, coupled with stray current corrosion in subway projects, which greatly reduces the useful life of metallic materials. The advantages. In the application technology of composite evacuation platforms and cable supports, the “designability” of composite material properties plays a large role.
However, the corrosion resistance of the original metal materials has always been difficult to solve. For example, various metal cable supports and components are corroded by humid environments, acid rain, salt spray, and the like.