@inproceedings{9ee2bec1c52b45daa32c2693d605a7d5,
title = "Multistable tape-spring assemblies for morphing aerofoil applications",
abstract = "Changing the aerodynamic forces acting on an aerofoil is most commonly done by camber change using an actuated pin-jointed control surface at the trailing edge. There can be significant mass penalties with such devices and achieving a smooth camber variation is difficult. This work presents a design for an aerofoil section which has at least two stable camber geometries. The aerofoil's multistability derives from the use of a novel tape-spring assembly. A tape-spring is effectively a cylindrical shell. They possess the unusual mechanical property of being able to be folded elastically and lock when straightened. The design case considered is based on a typical helicopter main rotor blade. The multistable device is used to improve the performance of the rotor blade during the transition between hover and forward flight. Force-displacement characteristics of the flap are found experimentally and compared with finite element and analytical models. Both modelling techniques are in good agreement with the manufactured demonstrator.",
keywords = "Morphing aircraft, Multistable structures, Nonlinear deformations, Residual stress",
author = "S. Daynes and Potter, {K. D.} and Weaver, {P. M.}",
year = "2008",
language = "English",
series = "19th International Conference on Adaptive Structures and Technologies 2008, ICAST 2008",
publisher = "Swiss Federal Laboratories for Materials Science and Technology (Empa)",
pages = "125--133",
booktitle = "19th International Conference on Adaptive Structures and Technologies 2008, ICAST 2008",
note = "19th International Conference on Adaptive Structures and Technologies 2008, ICAST 2008 ; Conference date: 06-10-2008 Through 09-10-2008",
}