Fiber reinforced composites have a series of excellent performance. Such as FRP itself is light weight, density of about 14-21kN/m?, for the steel 1/6 ~ 1/4, lighter than aluminum, and FRP strength / weight ratio is usually up to more than 4 times that of steel, can be applied to the large span structure, greatly reducing the structure of the deadweight, but also at the same time to meet the aviation, aerospace structural design of the important requirements of the material. The mechanical properties of FRP materials can be designed, i.e., by choosing suitable raw materials and reasonable lay-up forms, the composite components or composite structures can meet the requirements of use. FRP production processes include pultrusion, winding, hand gluing, spray molding and other ways, not only can scale production of FRP products with regular shapes, but also can produce almost any shape of the sheet used to construct Non-linear process modeling. In addition, there are thousands of independent fibers in the matrix of fiber reinforced composites. When a member made of this material is overloaded and a small number of fibers break, the load is quickly redistributed and transferred to the undamaged fibers, so the entire member does not lose its load-bearing capacity in a short period of time.
Fiber-reinforced composites were first used in aerospace and defense industries since their introduction in the 1940s. For example, Boeing 787 and Airbus 350 and other passenger aircraft manufacturing materials, fiber reinforced composites are used more than 50% (weight ratio), higher than steel, aluminum, titanium and other metals and their alloys. With the progress and development of science and technology, the cost of material preparation is also gradually reduced, fiber-reinforced composite materials have gradually begun to enter people's daily life, commonly used glass fiber reinforced composite material GFRP (commonly known as glass fiber reinforced plastic), carbon fiber reinforced composite material CFRP. GFRP is mostly used for landscape sculpture, seats, garbage cans, storage tanks, etc., and CFRP can be used for yachts, cars, bicycles, sports and leisure appliances. CFRP can be used for yachts, cars, bicycles, sports equipment, etc.
In the field of construction, fiber-reinforced composites began to be used in the 1960s, and in the 1990s, with the rise of fiber composites to reinforce reinforced concrete structures, the engineering community has gradually recognized this new material. In the past, architects have been using traditional building materials such as wood, stone, steel, concrete, etc. Modern society pays more attention to the functionality and aesthetics of the building, and new structures such as thin shell structure, cantilevered structure, suspension structure, and net frame structure put forward higher requirements for building materials. For example, Tomorrowland in Shanghai Disneyland covers an area of more than 2,300 square meters, and the extensive interior and exterior building structures and seating are composed of hundreds of flame-retardant gelcoat-finish FRP components of different shapes and sizes, and all the required FRP components are hand-formed. To ensure that all of the FRP used for Disneyland met the state requirements for a B1 fire resistance rating for fully assembled composite components, Materials Manufacturing ultimately utilized a high performance urethane acrylate with Aluminum Trihydrate (ATH) as an auxiliary resin, with 450g/m2 of fiberglass staple chopped raw filament mats and 450g/m2 of untwisted roving as reinforcement, as needed.