Aluminum honeycomb panel has many features that are not available in conventional materials, mainly in the following aspects:
(1) Light weight and low density: the core layer of the honeycomb panel is a typical porous structure, and the continuous polygonal cells are regularly arranged in a regular manner, so that the solid portion of the honeycomb panel has a small cross-sectional area, so its density is relatively high compared to other sandwich materials. Also small. Since the density of the honeycomb panel is much smaller than that of a common board such as a laminate or a steel sheet, the mass is also the lightest when the volume is the same. The quality of the aluminum honeycomb panel is only 9% of the same volume of FRP laminate, 11% of the same volume of steel, and 23% of the same volume of aluminum alloy. This allows aluminum honeycomb panels to save a lot of energy when used on airplanes. The low-density and light weight makes the honeycomb panel meet the requirements of “lightweight, energy-saving and environmentally friendly” materials for aerospace engineering aircraft and transportation vehicles.
(2) High specific strength and good rigidity: from the mechanical point of view, the structure of the honeycomb panel is similar to that of many I-beams. The panel is similar to the flange of the I-beam, which mainly functions to bear the in-plane load. The honeycomb core is similar to the web of the I-beam, and its main function is to withstand shear stress and connect and support the upper and lower panel members. However, the honeycomb core is different from the web of the I-beam. It is not a thin rib but a dense reinforcement. The core layer is fixed in the entire surface of the panel, and the height of the core layer is much larger than the thickness of the panel. The multiplication is multiplied, and the overall stability is also increased while increasing the overall stiffness.
(3) Good impact resistance and vibration damping. When the honeycomb panel is subjected to an out-of-plane impact, the impact force can be converted into the plastic deformation energy of the honeycomb core, so that the impact energy can be effectively absorbed. Through the self-dropping ball impact test on the aluminum honeycomb panel, the dent area and the dent depth of the impact site were observed, and it was found that there was no crack at the impact site, indicating that the toughness of the aluminum honeycomb panel is better and the impact resistance is stronger, and the absorption can be absorbed by its own deformation. Part of the energy, the vibration damping effect is good.
(4) Heat insulation and sound insulation. The material used to make the honeycomb panel itself has no heat insulation and sound insulation properties. For example, aluminum is a good conductor of heat and sound. However, the unique structure of the honeycomb panel makes the honeycomb panel have good heat insulation and sound insulation performance. The core is a porous structure, and the pores occupy most of the space. The aluminum honeycomb plate of 51.96x48.00x12.20mm is made of aluminum foil with a thickness of 0.1mm. The solid part only accounts for 4 of the total volume. %. After the honeycomb core and the panel are composited into a honeycomb panel, the cells become a hexagonal column-shaped closed space, and the air layer between the upper and lower panels is also divided into a plurality of closed cells, preventing air flow, and heat is difficult to be in the form of convection and radiation. In this structure, the propagation of sound waves is also greatly limited in it, so the honeycomb panel has better heat insulation and sound insulation properties.
(5) Good fire and moisture resistance. The panel and core layer of the aluminum honeycomb panel are made of aluminum alloy, and the aluminum alloy is a non-combustible material, which can play a good flame retarding effect. In addition, the aluminum alloy itself has good chemical stability, corrosion resistance and moisture resistance.
(6) Good formability and optional thickness. The thickness of the aluminum honeycomb panel can be selected from 5 to 200 mm according to actual needs, and the shape can also be made into a flat plate, a single curved panel or a double curved panel according to specific requirements. The aluminum honeycomb panel is not only good in formability but also not easily deformed after forming.
(7) No pollution, energy saving and environmental protection. Aluminum alloy is a material for preparing aluminum honeycomb panels. It is not radioactive, and does not volatilize any harmful gases harmful to human health. It can also be completely recycled, reused, and save resources and energy, which is in line with the requirements of energy saving and environmental protection. In addition, the honeycomb panel reduces the quality of the transportation vehicle, improves the power while ensuring the strength, reduces the fuel consumption, and reduces the exhaust pollution while saving energy.
(8) Beautiful and easy to clean. The aluminum alloy panel of the aluminum honeycomb panel can be used as it is, or it can be coated with various coating layers to various colors or patterns.
