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Deformation skin for aircraft

An aircraft and skin technology, applied in the field of aircraft skin, can solve problems such as limited carrying capacity

Inactive Publication Date: 2012-10-03
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Yin Weilong and others (Yin Weilong, Sun Qijian, Zhang Bo, Liu Jingzang, Leng Jinsong, "Application of shape memory polymers in deformable aircraft", Proceedings of the 15th National Conference on Composite Materials, July 2008) developed a shape memory Polymers are used to achieve large deformation of the skin, but their load-carrying capacity is limited

Method used

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Embodiment 1

[0031] Such as figure 1 , image 3 As shown, the present embodiment is a deformable aircraft skin based on a hexagonal honeycomb unit and an elastic matrix, which is composed of honeycomb units 21 with a periodic structure, and the honeycomb unit 21 is filled with an elastic matrix 3; The elastic matrix 3 in the embodiment is made of polyurethane elastic material and filled in each honeycomb unit 21 . In order to make the polyurethane elastic material and the honeycomb unit firmly bonded on the ground, the surface of the honeycomb unit is pre-sandblasted or other chemically treated to make it have a certain roughness. The material of the honeycomb unit itself can also be selected from metal materials or thermosetting plastics.

[0032] The deformed skin of this embodiment combines the hexagonal honeycomb unit and the polyurethane elastic material, so that it has good deformation ability (provided by the elastic matrix) and anti-bending ability (provided by the honeycomb), wh...

Embodiment 2

[0034] Such as figure 2 , image 3 As shown, the present embodiment is a deformed aircraft skin based on a hexagonal honeycomb unit and an elastic matrix. In addition to the combination of the same honeycomb unit 21 and the elastic matrix 3 as in Embodiment 1, it also has a first elastic panel 1 As with the second elastic panel 1', the elastic panel is also made of polyurethane elastic material, and can also be made of polyurethane elastic material layer and carbon fiber material layer, and the carbon fiber material layer is composed of several layers (1 to 4 layers) single layer The board is made; the thickness of the polyurethane elastomer material is 0.5-1.5mm. The elastic panel supports the filling of the elastic matrix in the honeycomb structure, increasing the load-bearing capacity of the deformable skin.

[0035] Such as Figure 4 As shown, the honeycomb unit in this embodiment is a hexagonal honeycomb unit with a negative Poisson's ratio.

[0036] Such as Figure...

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Abstract

The invention discloses a deformation skin for an aircraft. The deformation skin for the aircraft is formed by connecting N continuous cellular units (21), wherein the N is a natural number. The deformation skin for the aircraft is characterized in that: elastic substrates (3) are filled in the cellular units (21). According to the deformation skin for the aircraft, the capability of the deformation skin of transferring load is improved as high as possible on the premise of ensuring the deformation capability by a method for compounding different performance materials, the problem of contradiction between higher elastic deformation and transfer of airload under the action of lower driving force is solved, the local flow fields are actively controlled further by mean of an electrostrictive effect of polyurethane elastomers, and the deformation skin has the capability of deforming in different scales. According to the deformation skin, the properties of intelligent morphing aircrafts are comprehensively optimized.

Description

technical field [0001] The invention relates to an aircraft skin, in particular to a skin for an intelligent variable-variable aircraft. Background technique [0002] The aircraft skin plays the role of maintaining a smooth aerodynamic surface and transmitting local aerodynamic loads in the aircraft structure. At present, traditional aircraft skins are generally made of metal materials or composite materials with high strength and rigidity, and stringers are provided on the inner side of the skin to provide support to form the wall panels of the aircraft. In recent years, the research on intelligent variable-body aircraft has been gradually deepened at home and abroad. The so-called intelligent variable aircraft refers to actively changing its own shape to adapt to the changes according to the changes of the flight environment and flight tasks so as to improve the performance of the aircraft. Since the wing (rotor) is the main component that determines the performance of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C1/12
Inventor 裘进浩王晨季宏丽聂瑞邓文
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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