Polygonal lattice type grille-column structure sandwich panel

Abstract

The invention discloses a polygonal lattice type grille-column structure sandwich panel. The polygonal lattice type grille-column structure sandwich panel comprises an upper panel, a lower panel and polygonal lattice type grille-column structures, wherein the polygonal lattice type grille-column structures are arranged at the middle part; each polygonal lattice type grille-column structure comprises grille walls and reinforcing columns arranged at intersection positions of the grille walls. The polygonal lattice type grille-column structure sandwich panel is characterized in that the grille walls are of lattice structures; each grille wall comprises a framework and hollow lattices located in the framework, and the framework is formed by an upper frame, a lower frame and a connecting piece located between the upper frame and the lower frame; the diameter or the side length of the reinforcing columns is greater than the thickness of the grille walls. According to the polygonal lattice type grille-column structure sandwich panel disclosed by the invention, the reinforcing columns of the polygonal lattice type grille-column structure sandwich panel just can be used for bearing vertical load, the lattice type grille walls noly needs to bear bending moment action, the reinforcing columns and the lattice type grille walls are in clear division of labor, material performance can be fully expressed, and the material utilization rate is higher; on the basis, by arranging reinforcing ribs on the upper ends and the lower ends of the lattice type grille walls, the compression resistance, the bending resistance and the overall performance of the polygonal lattice type grille-column structure sandwich panel are further enhanced.

Description

technical field [0001] The invention relates to a sandwich panel, in particular to a grid-column structure sandwich panel with a polygonal lattice structure in the middle. Background technique [0002] Today, when energy saving and environmental protection have become the main evaluation index of products, the research of new light-weight structures has attracted people's attention. Sandwich panels have become one of the indispensable structures in the fields of aviation, aerospace, railways, automobiles, and construction due to their light weight, high rigidity, and strong designability. Due to the high production cost at the beginning, it has been mainly used in the aerospace field since the 1950s. Later, with the advancement of science and technology, the improvement of process methods was gradually applied to other industrial fields. Materials for making sandwich panels include paper, composite materials, metal, etc. The light weight and high strength of the sandwich ...

AI Technical Summary

Problems solved by technology

However, in the existing sandwich panel core structure, most of the grid walls are connected to each other, and some small columns are set at the joints of the grid walls, but it is not an optimal polygonal grid sandwich panel structure, because of the following Three disadvantages: 1) When the sandwich panel bears the load perpendicular to the face plate, the grid structure of the core layer is under compression, and the key area of ​​the connection between the grid walls is prone to torsion under the vertical load, thus It causes a half-wave out-of-plane buckling deformation of the grid wall, which has a great adverse effect on the compressive strength of the grid structure; 2) When the sandwich panel bears the load perpendicular to the face plate, the core structure mainly bears the The force acts on the junction of the grid walls

However, the stress in the middle part of the grid wall is very small, the material cannot be fully utilized, and the weight of the sandwich panel will be increased.

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