Novel composite aircraft skin material with characteristics of light weight, high strength and high temperature resistance

Abstract

The present invention discloses a novel composite aircraft skin material with characteristics of light weight, high strength and high temperature resistance. The composite material comprises three layers such as a titanium alloy layer, an aluminum alloy layer and a titanium alloy layer, wherein the material trademark of the titanium alloy is Ti-6Al-4V, the titanium alloy comprises 5.5-6.75% of aluminum, 3.5-4.5% of vanadium, and the balance of titanium, the material of the aluminum alloy is 2024, the thickness is 8 mm, and the chemical components of 2024 comprise 0.5% of silicon, 0.5% of iron, 3.8-4.9% of copper, 0.3-0.9% of manganese, 1.2-1.8% of magnesium, 0.10% of chromium, 0.25% of zinc, 0.15% of titanium, and the balance of aluminum. According to the present invention, the binding rate of the composite material achieves 100%, the strength of the bonding interface achieves the aluminum alloy yield strength, and the novel composite aircraft skin material is the novel composite aircraft skin material with characteristics of light weight, high strength and high temperature resistance.

Description

technical field [0001] The invention is a novel lightweight, high-strength, high-temperature-resistant composite aircraft skin material, which belongs to the field of composite materials. Background technique [0002] Aircraft skin is a layer of structural material that maintains the shape of the aircraft and makes it have excellent aerodynamic properties. After the skin is subjected to aerodynamic action, the force is transmitted to the connected fuselage and wing frame. The force is complex and directly in contact with the outside world. Not only does the skin material have high strength and good plasticity, it also requires a smooth surface and a high corrosion resistance. Commonly used aircraft skin materials are aluminum alloy, alloy steel, carbon fiber load material and titanium alloy. Aluminum alloy has low density, high strength, and wide application, but its heat resistance is poor, and the specific strength drops significantly at 150°C, and the working temperatur...

AI Technical Summary

Problems solved by technology

Aluminum alloy has low density, high strength, and wide application, but its heat resistance is poor, and the specific strength drops significantly at 150°C, and the working temperature is below 200°C

High-strength alloy steel can withstand high heat during hypersonic flight, but the density of alloy steel is too high, which will greatly increase the flight load of the aircraft

There are also some aircraft skins that use carbon fiber materials and titanium alloys, but carbon fibers have poor impact resistance and are not resistant to high temperatures. Titanium alloys have the characteristics of low density and high specific strength, which can effectively reduce the weight of aircraft. Adapt to high heat conditions during high-speed flight, but pure titanium alloy materials are expensive and difficult to promote

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