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A bistable morphing composite using viscoelastically generated prestress

Wang, Bing; Fancey, Kevin S.

Authors

Bing Wang



Abstract

Elastically generated prestress within polymeric composites can be used to create bistable morphing structures; i.e. they can ‘snap through’ between one of two states. In this paper, a morphing bistable structure has been produced, utilising viscoelastically generated prestress. Here, polymeric fibres are subjected to a tensile (viscoelastic) creep load which is released before the fibres are moulded into a matrix. Following curing, the previously strained fibres continue to attempt viscoelastic recovery, creating compressive stresses within the matrix that are counterbalanced by residual tension in the fibres. The bistable structure consists of prestressing strips bonded to the sides of a thin, flexible resin-impregnated fibre-glass sheet. Bistability is achieved through pairs of strips orientated to give opposing cylindrical configurations within the sheet. It is envisaged that viscoelastically prestressed morphing structures may overcome the potential limitations of elastic prestressing; i.e. production flexibility and product longevity.

Journal Article Type Article
Publication Date 2015-11
Journal Materials letters
Print ISSN 0167-577X
Electronic ISSN 1873-4979
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 158
Issue November
Pages 108-110
Institution Citation Wang, B., & Fancey, K. S. (2015). A bistable morphing composite using viscoelastically generated prestress. Materials letters, 158(November), 108-110. https://doi.org/10.1016/j.matlet.2015.05.129
DOI https://doi.org/10.1016/j.matlet.2015.05.129
Keywords Polymeric composites; Functional; Viscoelasticity
Publisher URL http://www.sciencedirect.com/science/article/pii/S0167577X15008356
Additional Information Authors' accepted manuscript of article published in: Materials letters, 2015, v.158, November at http://www.sciencedirec...e/pii/S0167577X15008356

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© 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/







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