Transverse honeycomb sandwich plate and preparation method thereof

Abstract

The invention discloses a transverse honeycomb sandwich plate and a preparation method thereof. The transverse honeycomb sandwich plate comprises an upper panel and a lower panel, an upper glue layerand a lower glue layer that are arranged between the upper panel and the lower panel, and a honeycomb layer arranged between the upper glue layer and the lower glue layer, wherein honeycomb holes of the honeycomb layer are parallel to the panels; the honeycomb layer comprises a layer or at least two layers of honeycomb cores; honeycomb holes of the honeycomb cores are filled with foams. When in preparation, the at least one layer of honeycomb cores is placed between the upper panel and the lower panel, and a glue layer material is poured between the upper surface of the honeycomb cores and theupper panel and between the lower surface of the honeycomb cores and the lower panel at room temperature, so as to obtain the upper glue layer and the lower glue layer; meanwhile, the foams are poured in the honeycomb holes of the honeycomb cores, so as to obtain the transverse honeycomb sandwich plate. The honeycomb sandwich plate disclosed by the invention is small in density, light in weight,high in specific strength and specific stiffness, strong bearing capacity, high in bonding strength between a core material and the panels and strong in vibration reduction, sound insulation and heatinsulation performances; in addition, the preparation method is simple and convenient and is strong in operability and low in cost.

Description

technical field [0001] The invention belongs to the field of sandwich panels, in particular to a transverse honeycomb sandwich panel and a preparation method thereof. Background technique [0002] Sandwich panels are usually composed of upper and lower panels and a core material between the upper and lower panels. The core material has adhesive properties and connects the upper and lower panels as a whole. The core material is similar to the web of the I-beam and bears the shear force in the plane. and normal tensile stress. Compared with traditional steel, sandwich panels have the advantages of strong functionality, wide range of uses, and light weight. Under the current trend of lightweight structures, sandwich panels have been used more and more in the engineering field, especially in Europe and the United States. , There have been large-scale engineering applications of sandwich panels. Domestic sandwich panels are mainly used in manned spaceflight, satellites and other...

AI Technical Summary

Problems solved by technology

The traditional honeycomb sandwich panel also exposed the following problems while improving the mechanical properties of the structure: First, the contact area between the core material and the panel of the honeycomb sandwich panel is small, the interface adhesion is poor, and delamination is prone to occur in practical engineering applications, etc. The failure mode; secondly, because the surface of the core material is densely covered with honeycomb holes, the sound insulation and noise reduction of the overall structure, thermal insulation performance is greatly reduced, and the application surface of the honeycomb sandwich panel is reduced; moreover, due to the structural characteristics of the traditional honeycomb sandwich panel, the overall The buckling stability of the structure is poor, and under certain extreme working conditions, local buckling or overall buckling failure of the panel is very easy to occur. In addition, the traditional honeycomb sandwich panel has a general anti-tilt performance, so it cannot be used for decks or hull shells such as warships.

[0004] Most of the existing honeycomb sandwich panel patents ensure the mechanical properties of the sandwich panel by adding reinforcement structures. For example, the Southeast University CN201510976402. It can improve the lateral buckling stability of the whole panel to a certain extent, and can increase the normal bearing capacity of the structure, but the size of the circular arc sheet needs to be prepared according to the size of the honeycomb sandwich panel, which cannot be prefabricated in large quantities, and its process is also difficult. It is difficult to adapt to the field needs of large-scale engineering applications as the cell size decreases and increases

Another example is the CN206781131U patent of Nanchang Aeronautical University which improves the sound insulation performance of the honeycomb sandwich panel by adding a resonant sound insulation sheet. This method can improve the sound insulation performance of the honeycomb sandwich panel, but the manufacturing process and installation process of the resonance sound insulation sheet itself are relatively Complicated and costly, it is difficult to use in large areas, and it is not easy to apply in engineering

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