Stretchable shape memory polymer composite skin with zero poisson ratio

A stretchable shape-memory polymer composite skin with a zero Poisson's ratio addresses structural complexity and load increase issues by using temperature-controlled deformation, enhancing aircraft efficiency and reducing aerodynamic losses.

DE112020007338B4Active Publication Date: 2026-05-21IND -UNIV COOP FOUNDATION KOREA AEROSPACE UNIV GYEONGGI-DO
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Patent Information

Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
IND -UNIV COOP FOUNDATION KOREA AEROSPACE UNIV GYEONGGI-DO
Filing Date
2020-11-03
Publication Date
2026-05-21

AI Technical Summary

Technical Problem

Existing stretchable shape memory polymer composite skins for morphing structures face challenges with complex structures and rapid load increase during deformation, limiting their practical application in aircraft with variable geometry.

Method used

A stretchable shape-memory polymer composite skin with a zero Poisson's ratio, comprising a main body made of conductive fibers, metal frames, and reinforcing elements, which can be deformed and maintained through temperature control via electrical power, allowing for easy shape change and reduced lateral deformation.

Benefits of technology

The skin maintains deformed geometry without external force, reducing aerodynamic losses and extending flight time with lower electrical power consumption.

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Abstract

Stretchable shape-memory polymer composite skin with a Poisson's ratio of zero, comprising the following parts: a main body made of conductive fibers; several metal frames made of metallic aluminium material, arranged under the main body, from which the electrical power is transferred to the main body; and a multitude of reinforcing elements made of synthetic resin or plastic material, each connected at intervals to the lower part of the main body by the several metal frames, the temperature in the main body can change based on the electrical power transmitted by the multiple metal frames.
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