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Viscoelastic effects in tape-springs

Kwok, Kawai and Pellegrino, Sergio (2011) Viscoelastic effects in tape-springs. In: 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2011-2022. ISBN 9781600869518.

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Following recent interest in constructing large self-deployable structures made of reinforced polymer materials, this paper presents a detailed study of viscoelastic effects in folding, stowage, and deployment of tape-springs which often act as deployment actuators in space structures. Folding and stowage behavior at different temperatures and rates are studied. It is found that the peak load increases with the folding rate but reduces with temperature. It is also shown that a load reduction of as much as 60% is possible during stowage due to relaxation behavior. Deployment behavior after significant load relaxation demonstrates features distinct from elastic tape-springs. It starts with a short dynamic response, followed by a quasi-static deployment, and ends with a slow creep recovery process. A key feature is that the localized fold stays stationary throughout deployment. Finite element simulations that incorporate an experimentally characterized viscoelastic material model are presented and found to capture the folding and stowage behavior accurately. The general features of deployment response are also predicted, but with larger discrepancy.

Item Type:Book Section
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URLURL TypeDescription
Kwok, Kawai0000-0001-6876-4267
Pellegrino, Sergio0000-0001-9373-3278
Additional Information:© 2011 by K. Kwok and S. Pellegrino. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. The authors are grateful to Professor Wolfgang Knauss for helpful comments and discussions. Financial support for KK by the Croucher Foundation is acknowledged.
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Croucher FoundationUNSPECIFIED
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AIAA Paper2011-2022
Record Number:CaltechAUTHORS:20190930-110458819
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Official Citation:Viscoelastic effects in tape-springs Kawai Kwok and Sergio Pellegrino 52nd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98941
Deposited By: George Porter
Deposited On:04 Oct 2019 20:40
Last Modified:04 Oct 2019 20:40

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