Composite material sandwich structure and manufacturing method thereof

Abstract

The invention provides a composite sandwich structure, comprising a main body structure (1) and a concentrated-tip-force diffusion block (2), wherein the main structure (1) comprises a first upper panel (101), a first lower panel (102) and a main core material (103) located between the two panels; the concentrated-tip-force diffusion block (2) and the lower panel (102) are glued and jointed via aglue film to form a wedge-shaped member; and the wedge-shaped member is laid between the first upper panel (101) and the second lower panel (102). The composite sandwich structure is molded by pressurized curing in a baking oven. According to the composite sandwich structure and the manufacturing method thereof in the invention, one end can bear concentrated force; and the manner of combined-structure secondary curing is employed, so the composite sandwich structure can be cured and molded in the baking oven, cost increase due to curing in an autoclave is avoided, and a low-density core material is protected from collapse under the action of high pressure of the autoclave.

Description

technical field [0001] The invention belongs to the field of aircraft structure design, and in particular relates to a composite material sandwich structure and a manufacturing method thereof. Background technique [0002] When the thickness of a local area of ​​a composite sandwich structure exceeds 2 mm, the entire structure generally needs to be cured in an autoclave, and the size of the part is limited by the size of the autoclave, and the manufacturing cost is high. In some structures, the sandwich structure is divided into two parts, the thicker part is cured in an autoclave, and the thinner part is cured in an oven, and then the two parts are connected with fasteners and glue, but the strength of the connection is relatively low. Difficult to guarantee, and increased structural weight and structural complexity. Contents of the invention [0003] The object of the present invention is to provide a composite material sandwich structure and its manufacturing method, w...

AI Technical Summary

Problems solved by technology

[0002] When the thickness of the local area of ​​the composite sandwich structure exceeds 2mm, the entire structure generally needs to be cured in an autoclave, the size of the part is limited by the size of the autoclave, and the manufacturing cost is high

In some structures, the sandwich structure is divided into two parts, the thicker part is cured in an autoclave, and the thinner part is cured in an oven, and then the two parts are connected with fasteners and glue, but the strength of the connection is relatively low. Difficult to guarantee, and increases structural weight and structural complexity

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