Publish Time: 2023-04-01 Origin: Site
1. It has sufficient strength and light weight. The structural design should ensure that the structure has sufficient strength (the so-called strength refers to the ability of the structure or material to resist damage) under various specified load states, does not produce unacceptable residual deformation, and has sufficient rigidity.
2. However, under the premise of meeting the rigidity and strength specified in the design requirements, the weight should be the lightest in order to carry more people, cargo, and fuel to improve flight performance. Therefore, materials with high strength and light weight should be selected to manufacture aircraft components.
3. Strong resistance to fatigue damage. Many structures of aircraft are often under the action of alternating loads, which are prone to fatigue damage. Therefore, the structure should have better resistance to fatigue damage in order to ensure flight safety.
Therefore, aluminum alloy is the main component of aircraft structural materials. In addition to maintaining the advantages of pure aluminum (such as small specific gravity, high plasticity, corrosion resistance, good thermal conductivity and electrical conductivity), it also has good mechanical properties, physical properties and process properties. Most wrought aluminum alloys are easy to cut and press to form. Generally speaking, aluminum alloy is the main structure of aircraft because of its advantages that other alloys cannot match, such as close to the specific strength of Chin alloy and structural steel, high specific stiffness, excellent process performance, convenient forming, and low cost. Materials (accounting for about 60%~90%).