Application of carbon fiber reinforced PEEK in low altitude field
PEEK as special engineering plastics polyether ether ketone, high temperature resistance, good low temperature resistance, wear resistance, high strength, corrosion resistance, gamma ray radiation resistance, fatigue resistance, the advantages of easy shaping, is one of the high performance polymer of comprehensive performance is very outstanding. PEEK has gradually replaced traditional metal materials in aviation, aerospace, military, nuclear power and other fields, and has also shown an increasingly important role in the field of low-altitude economy. Compared with metal materials, PEEK has strong fatigue resistance, can maintain high rigidity at a high temperature of 260 ° C, the rigidity is 4 times that of aluminum alloy, 1.5 times that of steel, and the weight is only half that of aluminum alloy.CFRTP
Carbon fiber reinforced PEEK material
Carbon fiber reinforced PEEK composite material refers to carbon fiber reinforced PEEK resin based composite material in the form of short carbon fiber (SCF), long carbon fiber (LCF) and continuous carbon fiber (CCF) or fabric. Pure PEEK itself is a special engineering plastic, with radiation resistance, self-lubrication, high temperature resistance, wear resistance, fatigue resistance and other characteristics. The performance of carbon fiber reinforced PEEK material has improved in many aspects compared with pure PEEK material.
At room temperature, the tensile strength of 30% short carbon fiber reinforced polyether ether ketone composite is at least doubled and tripled at 150 ℃, while the tensile strength of polypropylene cyano continuous carbon fiber reinforced polyether ether ketone material with strip single prepreg is 20 times that of unreinforced polyether ether ketone material at room temperature. At the same time, the impact strength, bending strength and modulus of the reinforced composite are also greatly improved, the elongation is sharply reduced, and the thermal deformation temperature can exceed 300℃. The impact energy absorption rate of the composite directly affects the performance of the composite when it is subjected to impact. The carbon fiber reinforced polyether ether ketone PEEK composite shows a specific energy absorption capacity of up to 180kJ/kg.
The reinforcement of carbon fiber can resist the thermal softening of PEEK to a certain extent, forming a very high strength transfer film to effectively protect the contact area, so the wear rate of carbon fiber reinforced polyether ether ketone PEEK composite material is significantly lower than that of pure PEEK. Carbon fiber reinforced polyether ether ketone PEEK composite material is used for parts production, can effectively avoid metal or ceramic materials easy to produce surface cracks and other problems, its excellent tribological properties even exceed ultra-high molar mass polyethylene.
Compared with traditional aluminum alloy and stainless steel materials, PEEK composite materials have obvious advantages in light weight and strength.
The application of carbon fiber reinforced PEEK in UAV
In the condition of high-speed motion of the aircraft, low mass means low inertia, which can achieve higher control accuracy. Especially through carbon fiber reinforced PEEK thermoplastic composite material, its performance can be further improved, and it has a high application potential in the field of low altitude economy.
Carbon fiber reinforced PEEK can be used in drones to make frames, propellers and engine components, as well as lightweight structural components such as seats, doors and window frames for low-altitude flying cars, as well as shells for sensors and control systems.
Advantages include: ● Weight reduction and noise reduction: After using PEEK and short fiber composite materials, weight reduction can also maintain the excellent performance of the fuselage material, improve the strength of the blade itself, better dynamic balance, and more significant noise reduction effect. ● High strength: Compared with traditional metal materials, PEEK has high tensile strength and fatigue resistance, suitable for repeated use and extreme loads. ● Good flight stability: PEEK and its composite materials have small thermal expansion coefficient, strong fatigue resistance and vibration resistance, can be used normally in harsh environments, the blade is not easy to deform due to the external environment, and the service life is long. ● Heat resistance: PEEK can maintain performance at extreme temperatures. ● Chemical resistance: PEEK has good resistance to most solvents, chemicals and radiation, suitable for use in harsh environments. ● Self-lubricating: The self-lubricating performance of PEEK reduces the friction between components and extends the service life of the equipment.
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