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Composite materials have gradually become the main structural material for UAV production, which effectively enhances the design of UAVs. Using composite materials can not only design lightweight, high aeroelastic structures, but also easily spray stealth paint on its surface. layers, and different reinforcing phases can also be added to reduce the damage tolerance of the composite at high speeds. The UAV composite material structure mainly includes laminate structure and sandwich structure. Due to its strong designability, the number of UAV parts and components can be greatly reduced in the overall design of structural components. The typical application is wing-body fusion. structure, and its manufacturing technology will become a major trend in the development of conceptual UAVs of UAVs.

The reinforcing materials used for UAV composite structures mainly include carbon fiber, glass fiber, etc., while the resin system mainly includes epoxy resin system and bismaleimide resin system. The former has better processability and the latter has temperature resistance. better. Different material systems have a great impact on the performance of composite materials. When designing UAV composite material structural parts, it is necessary to select appropriate materials according to the actual stress and use environment.

Several advantages of composite materials used in drones:

1. Compared with traditional metal materials, composite materials have the characteristics of high specific strength and specific stiffness, small thermal expansion coefficient, strong fatigue resistance and vibration resistance. It can be used in UAV structures to reduce weight by 25% to 30%. Resin-based composite materials have many advantages, such as light weight, easy molding of complex or large structures, large design space, high specific strength and specific stiffness, and small thermal expansion coefficient.

2. The composite material itself is designable. Without changing the weight of the structure, the design can be optimized according to the strength and stiffness requirements of the aircraft; it is fully designed and manufactured in terms of technology.

It satisfies the feature of large-area integral forming required for most UAVs in high-level wing-body fusion structures.

3. The characteristics of composite materials such as light weight, high specific strength and specific modulus are often used in the structural design of UAV composite materials.

It is mainly formed by the organic combination of the good mechanical properties of the reinforcing material (carbon fiber, glass fiber, etc.) and the bonding effect of the basic material (resin).

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Post time: Apr-27-2022