Flexible coating

Abstract

The invention discloses a flexible coating, which is composed of a plurality of accordion honeycomb units, a plurality of grillwork honeycomb units and a panel, wherein the accordion honeycomb units and the grillwork honeycomb units are alternatively arranged into designed sizes to form a honeycomb sandwich structure; the panel is respectively covered on and adhered to the upper surface and lower surface of the honeycomb sandwich structure; the accordion honeycomb units display the ability of continuously deforming along a chordwise direction, have the ability of changing in a chordwise wing camber at the same time, can generate a larger torsion angle and change an incidence angle of the wing; the grillwork honeycomb units distributed along a spanwise direction can obviously increase the anti-bending ability along the spanwise direction and can bear out-of-plane aerodynamic loads. The anti-bending modulus is increased by one order of magnitude under the condition that an in-plane tensile modulus is ensured through a hybrid honeycomb sandwich structure under the circumstances of the same wing sections, the same wingspans and the same out-of-plane loads, thus the bearing ability of the reconfigurable wing is effectively increased, and the increase of launch weight, effective load and ceiling of a variant plane is facilitated.

Description

technical field [0001] The invention relates to the fields of aviation, aerospace, material preparation, etc., and specifically relates to a new type of hybrid honeycomb and flexible honeycomb with low in-plane tensile modulus, high flexural modulus, and ability to withstand large deformations that can be used for variant aircraft wing skins. A three-layer sandwich skin structure composed of panels. Background technique [0002] Since the invention of the honeycomb sandwich structure, it has been widely used in various military and civilian fields such as buildings, bridges, and aircraft. Most of the early honeycomb sandwich structures were made of aluminum alloy or light materials, which were mainly used as a filling material to reduce the weight of the structure. At the beginning of the invention, the honeycomb structure was expensive, so it was mainly used in the aerospace field, generally as a filling material for structural components such as aircraft wings. With the ...

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the problem of insufficient flexibility existing in the prior art that the deformability is still limited, the present invention proposes a flexible skin

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