Light-weight orthogonal corrugated core sandwich composite structure and preparation method thereof

Abstract

The invention discloses a light-weight orthogonal corrugated core sandwich composite structure and a preparation method thereof. The composite structure comprises an upper panel, a lower panel and an orthogonal corrugated core body arranged between the upper panel and the lower panel; compared with the traditional transverse isotropic corrugated core sandwich structure, in the orthogonal approximately-isotropic corrugated core sandwich composite structure disclosed by the invention, anti-shear capacities and anti-bending capacities in two in-plane orthogonal directions are approximately the same; in out-of-plane vertical directions, with the adoption of the design thinking and method of orthogonal corrugations, the anti-local buckling capacity of the orthogonal approximately-isotropic corrugated core sandwich composite structure is greatly enhanced compared with the transverse isotropic corrugated core sandwich structure, thus effectively avoiding the occurrences of local collapse and deformation along a corrugated surface; a gap formed by the orthogonal design of the core layer provides a space for multifunctional design for the structure, and functional components and parts can be placed, and sound absorption materials or other functional materials can be filled according to the needs of engineering applications, thus realizing multi-functionalization.

Description

technical field [0001] The invention relates to the fields of ship hulls, aircraft structures, ocean platforms, automobile bodies, high-speed trains, buildings and the like, in particular to a lightweight orthogonal corrugated sandwich composite structure and a preparation method thereof. Background technique [0002] With the low-density "sandwich" used in different structures in recent years, sandwich materials and structures play an important role in many fields with their excellent properties. Sandwich materials and structures mainly use low-density core materials to reduce their weight, and their load-bearing capacity is several times stronger than that of solid layered structures of the same volume. The sandwich structure has the advantages of high specific strength, high specific stiffness, and impact / collision resistance. Due to these excellent properties, countries all over the world pay more attention to the research and development of this type of material and str...

AI Technical Summary

Problems solved by technology

However, the corrugated sandwich structure currently used has obvious anisotropy. For the traditional transversely anisotropic corrugated sandwich structure, the shear resistance and bending resistance of the two orthogonal directions in the plane are completely different. The bending resistance in the direction of the corrugation is significantly greater than that parallel to the direction of the corrugation; the shear resistance in the direction parallel to the corrugation is significantly greater than the shear resistance in the direction perpendicular to the corrugation, and the ability to resist local buckling deformation and local collapse is relatively low. Low, so that the corrugated sandwich structure has obvious limitations in engineering applications

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