The development and application of composite materials in the field of aerospace defense

The development of composite materials is of great significance to the development of aviation equipment. Aircraft performance depends half on design and half on materials. The quality of the material has a significant impact on speed, altitude, range, maneuverability, stealth, service life, safety and reliability, maintainability and other performance. According to statistics, 70% of the weight loss of aircraft is contributed by advances in aviation material technology. Aircraft using carbon fiber reinforced resin matrix composites have obvious advantages in reducing aircraft weight, reducing fuel, reducing maintenance costs and extending aircraft service life.

Fiber reinforced composite materials have the characteristics of heat release, heat insulation, high temperature resistance, etc., and are widely used in aerospace industry.

The high-strength glass fiber resin matrix composite material can be used as the structural material and ablative heat insulation material of multi-tube long-range rocket and air-to-air missile, realizing the integration of nozzle convergence section, expansion section and tail frame, greatly reducing the weapon quality and improving the tactical performance.

Carbon fiber composite materials have also been better used in solid rocket engines, "Pegasus", Delta launch vehicles, "Trident" II, "Dwarf" missile models have adopted composite solid rocket engines. The U.S. strategic missile MX missile, the Russian strategic missile "poplar" M missile, etc., have adopted advanced composite material launch canisters.

Ship composite material technology has also developed rapidly, has basically reached the level of practical application, simplifying manufacturing, reducing cost has become the focus of current technology. The United States Navy equipment has a large number of applications of composite materials, such as the "Ford" aircraft carrier, "Virginia" class submarine, DDG1000 destroyer and so on. The Type 45 destroyer of the British Navy is also equipped with a composite mast of sandwich structure, which has the characteristics of stealth and reducing antenna maintenance.