9 May 2014 Mechanism of stroke enhancement by coiling in carbon nanotube hybrid yarn artificial muscles (presentation video)
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Abstract
Twisted carbon nanotube yarns have been shown to develop useful torsional and tensile actuation. Particularly useful are those hybrid yarns that incorporate a volume-changing guest material into the yarn pore space. Changing guest volume causes concomitant untwisting and shortening of the twisted yarn. Intriguingly, the magnitude of the tensile actuation can be increased by an order of magnitude by inserting such high twist into the fiber as to cause coiling. The mechanism of coil-induced stroke enhancement is investigated using ordinary spring mechanics and it is shown that tensile actuation can be adequately predicted from the coil and yarn geometries.
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Carter S. Haines, Carter S. Haines, Márcio D. Lima, Márcio D. Lima, Na Li, Na Li, Geoffrey M. Spinks, Geoffrey M. Spinks, Javad Foroughi, Javad Foroughi, John D. W. Madden, John D. W. Madden, Shaoli Fang, Shaoli Fang, Monica Jung De Andrade, Monica Jung De Andrade, Fatma Göktepe, Fatma Göktepe, Ozer Göktepe, Ozer Göktepe, Seyed Mohammad Mirvakili, Seyed Mohammad Mirvakili, Sina Naficy, Sina Naficy, Xavier Lepró, Xavier Lepró, Jiyoung Oh, Jiyoung Oh, Mikhail E. Kozlov, Mikhail E. Kozlov, Seon-Jeong Kim, Seon-Jeong Kim, Xiuru Xu, Xiuru Xu, Gordon G. Wallace, Gordon G. Wallace, Ray H. Baughman, Ray H. Baughman, } "Mechanism of stroke enhancement by coiling in carbon nanotube hybrid yarn artificial muscles (presentation video)", Proc. SPIE 9056, Electroactive Polymer Actuators and Devices (EAPAD) 2014, 905624 (9 May 2014); doi: 10.1117/12.2046188; https://doi.org/10.1117/12.2046188
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