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Curved bistable composite slit tubes with positive Gaussian curvature

Knott, Geoffrey and Viquerat, Andrew (2017) Curved bistable composite slit tubes with positive Gaussian curvature AIAA Journal.

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Abstract

An investigation into the bistability of positively curved laminated composite slit tubes is presented, establishing a natural extension in this area which has previously been focused on straight tubes. Curved slit tubes are modeled as the surface segments of a torus. The design space is explored through a parametric study to investigate the effect on the second stable state, representing a small coil. This includes the effects of longitudinal curvature, cross-section subtending angles, non-uniform transverse curvature and spatially varying laminate properties. The second equilibrium state is determined through strain energy minimization using the Rayleigh-Ritz method. To verify the model, samples were manufactured from glass-fiber braid and polypropyleneresin. This investigation finds: (i) the initial curvature along the length of the tube has little effect on coil radius, however, the coil has a distinct barrel shape; (ii) highly enclosed and (iii) highly curved cross-sections result in higher edge strains of the second equilibrium, enabling identification of practical bistable tubes, and conversely; (iv) the greater the initial curvature along the length of the tube, the lower the second equilibrium strain.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
NameEmailORCID
Knott, Geoffreyg.knott@surrey.ac.ukUNSPECIFIED
Viquerat, Andrewa.viquerat@surrey.ac.ukUNSPECIFIED
Date : 2017
Grant Title : Engineering and Physical Sciences Research Council (EPSRC)
Copyright Disclaimer : Copyright © 2017 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved. All requests for copying and permission to reprint should be submitted to CCC at www.copyright.com; employ the ISSN 0001-1452 (print) or 1533-385X (online) to initiate your request.
Depositing User : Clive Harris
Date Deposited : 20 Nov 2017 14:38
Last Modified : 20 Nov 2017 14:38
URI: http://epubs.surrey.ac.uk/id/eprint/844956

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