The practical application of composite material technology plays an important role in the design and manufacture of aircraft. This is because many excellent functions of composite materials, such as high strength and specific modulus, excellent fatigue resistance, and unique material designability, are ideal properties for aircraft structures. Advanced composite materials, typified by high-performance carbon (graphite) fiber composite materials, are used as structural and functional integrated building materials, and also play an irreplaceable role in missiles, launch vehicles and satellite vehicles.
Carbon fiber’s light, high-strength performance and stable technology make carbon fiber composite materials used in the column structure of large commercial aircraft. For large commercial aircraft represented by B787 and A350, the proportion of composite materials in the weight of the aircraft structure has reached or exceeded 50%. The flight wings of the larger commercial aircraft A380 are also completely made of composite materials. These are all composite materials. Milestone used on large commercial aircraft.
Another application area of carbon fiber composites in commercial aircraft is in engines and nacelles, such as engine blades are infused with epoxy resin through the autoclave process and 3D carbon fiber fabrics. The composite materials produced have high toughness, high damage tolerance, Low crack growth, high energy absorption, impact and delamination resistance. In addition to providing structural contributions, the sandwich structure using it as the core material and epoxy prepreg as the skin also has a good noise reduction effect.
Carbon fiber composite materials are also widely used in helicopters. In addition to structural parts such as fuselage and tail boom, they also include blades, drive shafts, high-temperature fairings and other components that have higher requirements for fatigue and temperature and humidity performance. CFRP can also be used to manufacture stealth aircraft. The cross-sectional area of the carbon fiber used is a special-shaped cross-section, and a layer of porous carbon particles or a layer of porous microspheres are deposited on the surface to scatter and absorb radar waves, giving it a wave-absorbing function.
At present, many people in the industry at home and abroad have done a lot of in-depth research on the manufacture, design, and performance testing of CFRP. Some resin matrices that are not sensitive to the environment have emerged one after another, which gradually enhances the adaptability of CFRP to complex space environments and reduces the quality. And the dimensional changes are getting smaller and smaller, which provides a strong condition for the carbon fiber composite materials to be more widely used in high-precision aeronautical devices.
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Post time: Feb-20-2023