A recoverable impact resistant skin structure
By employing a heterogeneous pyramidal lattice sandwich structure in the aircraft skin, combined with titanium alloy panels and shape memory alloy deformation layers, the problem of irreversible deformation of the aircraft skin after impact has been solved, achieving low-cost recoverability and impact resistance, and improving flight safety.
CN117416498BActive Publication Date: 2026-07-21SHENYANG AEROSPACE UNIVERSITY +1
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHENYANG AEROSPACE UNIVERSITY
- Filing Date
- 2023-11-07
- Publication Date
- 2026-07-21
AI Technical Summary
Technical Problem
Existing aircraft skins are prone to irreversible plastic deformation after being struck by birds or FODs, leading to maintenance difficulties and increased costs, and affecting flight safety.
Method used
It adopts a heterogeneous pyramid-shaped lattice sandwich structure, including a titanium alloy panel and a shape memory alloy deformation layer, which absorbs impact energy through elastic and plastic deformation, and can recover through heating or negative pressure when the plastic deformation is less than 10%.
Benefits of technology
This technology enables aircraft skin to be recoverable and shock-resistant under low to medium impact energy, reducing maintenance costs and improving flight safety and economic efficiency.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN117416498B_ABST
Abstract
The application provides a recoverable impact-resistant skin structure, which comprises a plurality of transversely arranged and connected pyramid lattice structure cells, the pyramid lattice structure cell comprises two face plates and a pyramid lattice sandwich structure sandwiched between the two face plates, the pyramid lattice sandwich structure comprises a structure layer and a deformation layer sandwiched between the structure layer, and the deformation layer is made of a shape memory alloy material. The structure layer or the deformation layer is composed of pyramid units, and each pyramid unit is composed of four ribs. Through the combination of the structure layer and the deformation layer, the pyramid lattice structure cell of heterogeneous materials is formed, so that the aircraft skin structure has both recoverable deformation capacity and impact resistance, and the dynamic response effect under impact is realized. When the impact energy is small, the face plate and the structure layer are elastically deformed to absorb energy; with the increase of the impact energy, the deformation layer is plastically deformed to further absorb energy, and material-structure-function integration is realized.
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