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What carbon fiber composites are used in advanced weapons?

May 19, 2020

1.Fighter planes and bombers.

      In foreign countries, composite materials are used in fighter aircraft fuselage, main wing, vertical tail, flat tail and skin, which play an obvious role in weight reduction and greatly improve fatigue resistance, corrosion resistance and other performances. compared with the metal structure, the weight is reduced by 31.5%, the parts are reduced by 61.5%, and the fasteners are reduced by 61.3%. The vertical stability surface of the composite material can reduce the mass by 32.24%.

      The Fmur35 Lightning II Fighter, also known as the Joint strike Fighter, is a new single-seat, single-engine, supersonic stealth fighter. Excellent close air support, tactical bombing and air superiority missions. The structure weight coefficient of Fmur22 is 27.8%, and the amount of advanced composite materials has reached more than 25%.

Magic Lightning II Fighter (left), US Fmuri 22 military aircraft (right)

American BMI-2 stealthy bomber (fuselage substrate)

CCarbon fiber reinforced composites are not only lightweight and high-strength structural materials, but also have important stealth functions, such as CF/PEEK or CF/PPS have excellent broad-peak absorption properties and can effectively absorb radar waves. The United States has been used to build the latest stealth bomber.

      The main structure of the American Pmur22 supersonic aircraft is the use of medium modulus carbon fiber reinforced special engineering plastics. Mirage III's decelerated parachute cover and ejection device are also made of this material. It has been successfully used to absorb radar waves such as ribs, skins and some connectors and fasteners of aircraft. The shell of Tomahawk cruise missile, the fuselage base material of BMI-2 stealth bomber and the local part of F117A stealth aircraft also use carbon fiber modified polymer wave-absorbing material.

Mirage III Fighter Picture (left), US F117A stealth bomber (right)

In the use of fuselage materials, traditional aluminum alloy is only 10%, composite materials and titanium alloy materials each account for 45%. The light weight of the new composite materials greatly reduces the overall weight of the fighter, the latest Chinese "crane" type air fighter FF-2A uses only 10% of the fuselage materials, while composite materials and titanium alloy materials each account for 45%.

The latest Chinese Crane Air Fighter

Carbon fiber composites are widely used in the manufacture of new fighter planes because of their light weight and high strength. Chinese LMY 15 "Falcon" trainers have adopted a large number of carbon fiber composite materials to make parts of the fuselage of the Chinese J-10 fighter plane to reduce the weight.

Chinese Lmur15 Falcon trainer (left), Chinese J-10 fighter (right)

II. Missiles.

      Carbon fiber composites are mainly used in the structural components of missile warheads, projectile bodies and engine shells. Carbon / carbon and carbon / phenolic are important heat-resistant materials such as warhead end, engine nozzle throat lining and ablation-resistant parts. it has been widely used in American dwarf, militia, Trident and other strategic missiles.

      Solid motor shells in the United States, Japan and France mainly use carbon fiber composite materials, such as American Trident-2 missiles, Tomahawk cruise missiles, Hercules-4 rockets, modified Arian-2 rockets in France, and Mmur5 rockets in Japan, among which the most widely used is IM-7 carbon fiber with tensile strength of 5.3GPa produced by Hercules of the United States. The highest performance is Toray Tmur800 fiber, tensile strength 5.65Gpa, Young's modulus 300GPa.

French Arianne V missile