Design of transformable skins is currently a focus of considerable research for morphing aircraft structures. This work aims to develop a structural concept of flexible skins, which should be flexible to achieve large-scale continuous deformations, yet having sufficient stiffness to withstand large aerodynamic forces, and be light. The basic concept is compliant cellular structures made up of the re-entrant cells with negative Poisson's ratio (NPR) and shape memory alloy (SMA) tendon actuators. By controlling the temperatures of the SMA actuators, the shape and plane area of compliant cellular structure can be changed continuously. The mechanical characteristics of compliant cellular structures are here investigated through a numerical model and experimental investigations. Some numerical formulations accurately describe the behavior of the compliant structures and SMA actuators. And optimization of the design parameters is considered to make the compliant cellular structures tradeoff between the skin flexibility and structural stiffness. Experimental tests are also performed to demonstrate the accuracy of the model and to illustrate the properties of the adaptive flexible skin prototype.
Design and optimization of compliant cellular structures for morphing aircraft skins
Design und Optimierung nachgiebiger Zellstrukturen für morphende Flugzeughüllen
2008
7 Seiten, 7 Bilder, 1 Tabelle, 5 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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