Composite materials lead the aerospace industry. The biggest feature of the Boeing 787 is the extensive use of advanced composite materials to build aircraft frames. With the country’s strength and technological advancement, the application of composite materials in the aerospace industry is becoming more and more important.
Boeing used the technology and airframe design proposed by the "Sonic Cruiser" on the Boeing 787, and decided to use a large number of advanced composite materials on the main structure of the 7E7 (including wings and fuselage). Boeing 787 has a number of technological innovations, the most notable of which is that about half of the body structure of the Boeing 787 is replaced by lighter and stronger composite materials instead of aluminum alloy. It is the first civil jet with composite materials as the main material. airliner. On the one hand, because metal can hide the damage problem, this damage is difficult to find until it is broken, and synthetic materials do not have this problem; on the other hand, the fuselage made of composite materials is relatively light. It can also bury fiber optic tubes to monitor the condition of the aircraft, and can meet the latest aircraft requirements for later maintenance costs and safety, which makes the Boeing 787 more fuel-efficient, and it can also save on maintenance costs. This synthetic material is similar to the carbon fiber synthetic material used in Formula One racing cars.
In 1985, Airbus took the lead in using this composite material in aircraft manufacturing to manufacture the tail wing of the A310 passenger aircraft. Subsequently, Airbus also used this composite composite material to manufacture the wing of the A350 passenger aircraft. Boeing 787 will fully apply this technology to the 787 aircraft. The main components such as the fuselage and wings will use this new technology. The weight ratio will exceed 50%. Previously, this ratio was only 20%. Composite materials are also widely used in engine blades, engine hoods and other parts. The Boeing 787 is also called the "Dream" aircraft because of the wide application of this new technology (materials used (by weight): 61% composite material (carbon fiber), 20% aluminum, 11% titanium, 8% steel). The production line takes only 3 days (calculated based on the full speed of the production line) to complete the assembly of a 787, while the 737 takes 11 days.