Core material, manufacturing methods thereof and composite material

Abstract

The invention discloses a composite material and a core material. The core material includes multiple cell units. Each cell unit includes a second type unit wall for connecting to the adjacent cell unit. Each cell unit also includes a first type unit wall. Each first type unit wall includes two connected cell walls. In the same first unit wall, an included angle is formed between the two adjacentcell walls to make the first unit wall be a bent structure. A first type cell unit and a second cell unit with different shape are defined by the four adjacent first unit walls and the two adjacent second unit walls. The first type unit walls have the ability to regularly cause the deformation of the first type unit walls. When the core material is subjected to force in an L direction or a W direction and transfer the force to the cell units, the included angle between the two adjacent cell walls changes to compensate the deformation in the other direction perpendicular to the deformation direction so as to improve the deformation ability of the core material under stress, and so the core material has the ability to form a spherical surface and other undevelopable surfaces. The invention also discloses manufacturing methods of the core material.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a core material, a manufacturing method thereof, and a composite material. Background technique [0002] The core material for the sandwich structure, especially the hexagonal honeycomb core material is made of aramid paper, aluminum foil, glass fiber cloth, carbon fiber cloth, stainless steel foil, superalloy foil, kraft paper and other non-metallic materials or one of the metal materials . Among them, the hexagonal honeycomb core material made of aramid paper as the main material is the current research and development hotspot. The hexagonal honeycomb core material of aramid paper is aramid paper coated, laminated and The hexagonal cell-shaped honeycomb core material is produced by a series of complex processes such as sheet lamination, pressing, cutting, expansion, dipping, and resin curing. It is an advanced composite material reinforced with high-strength and hi...

AI Technical Summary

Problems solved by technology

like figure 1 As shown, the traditional hexagonal core material cell unit 1' is a regular hexagon, and is arranged to form a honeycomb structure, but the six cell walls 11' of the regular hexagonal 1' cell unit are all straight. In the plane, when the core material is stretched in one direction, the size in the other direction perpendicular to it can only be reduced. When one direction is compressed, the size in the other direction perpendicular to it can only be elongated, resulting in six sides of the flat cell wall. The core material becomes "saddle-shaped" during bending

Therefore, the deformability of the existing hexagonal core material is very poor, so the application field is limited

Images