A torsional artificial muscle from twisted nitinol microwire
Nitinol microwires of 25 μm in diameter can have tensile actuation of up to 4.5% in less than 100 ms. A work density of up to 480 MPa can be achieved from these microwires. In the present work, we are showing that by twisting the microwires in form of closed-loop two-ply yarn we can create a torsion...
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| Format: | Article |
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SPIE-Intl Soc Optical Eng
2018
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| Online Access: | http://hdl.handle.net/1721.1/116592 https://orcid.org/0000-0002-8251-5432 |
| _version_ | 1811087797466955776 |
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| author | Hunter, Ian W. Hunter, Ian Mirvakili, Seyed Mohammad |
| author2 | Massachusetts Institute of Technology. Department of Biological Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Biological Engineering Hunter, Ian W. Hunter, Ian Mirvakili, Seyed Mohammad |
| author_sort | Hunter, Ian W. |
| collection | MIT |
| description | Nitinol microwires of 25 μm in diameter can have tensile actuation of up to 4.5% in less than 100 ms. A work density of up to 480 MPa can be achieved from these microwires. In the present work, we are showing that by twisting the microwires in form of closed-loop two-ply yarn we can create a torsional actuator. We achieved a revisable torsional stroke of 46°/mm with peak rotational speed of up to 10,000 rpm. We measured a gravimetric torque of up to 28.5 N•m/kg which is higher than the 3-6 N•m/kg for direct-drive commercial electric motors. These remarkable performance results are comparable to those of guest-infiltrated carbon nanotube twisted yarns. |
| first_indexed | 2024-09-23T13:52:06Z |
| format | Article |
| id | mit-1721.1/116592 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T13:52:06Z |
| publishDate | 2018 |
| publisher | SPIE-Intl Soc Optical Eng |
| record_format | dspace |
| spelling | mit-1721.1/1165922022-10-01T17:39:51Z A torsional artificial muscle from twisted nitinol microwire Hunter, Ian W. Hunter, Ian Mirvakili, Seyed Mohammad Massachusetts Institute of Technology. Department of Biological Engineering Massachusetts Institute of Technology. Department of Mechanical Engineering Koch Institute for Integrative Cancer Research at MIT Mirvakili, Seyed M Hunter, Ian Nitinol microwires of 25 μm in diameter can have tensile actuation of up to 4.5% in less than 100 ms. A work density of up to 480 MPa can be achieved from these microwires. In the present work, we are showing that by twisting the microwires in form of closed-loop two-ply yarn we can create a torsional actuator. We achieved a revisable torsional stroke of 46°/mm with peak rotational speed of up to 10,000 rpm. We measured a gravimetric torque of up to 28.5 N•m/kg which is higher than the 3-6 N•m/kg for direct-drive commercial electric motors. These remarkable performance results are comparable to those of guest-infiltrated carbon nanotube twisted yarns. Natural Sciences and Engineering Research Council of Canada (Alexander Graham Bell Graduate Fellowship) 2018-06-26T13:13:41Z 2018-06-26T13:13:41Z 2017-04 2018-03-16T13:49:33Z Article http://purl.org/eprint/type/ConferencePaper 0277-786X http://hdl.handle.net/1721.1/116592 Mirvakili, Seyed M., and Ian W. Hunter. “A Torsional Artificial Muscle from Twisted Nitinol Microwire.” Edited by Yoseph Bar-Cohen. Electroactive Polymer Actuators and Devices (EAPAD) 2017 (April 17, 2017). https://orcid.org/0000-0002-8251-5432 http://dx.doi.org/10.1117/12.2261712 Proceedings of SPIE--the Society of Photo-Optical Instrumentation Engineers Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf SPIE-Intl Soc Optical Eng SPIE |
| spellingShingle | Hunter, Ian W. Hunter, Ian Mirvakili, Seyed Mohammad A torsional artificial muscle from twisted nitinol microwire |
| title | A torsional artificial muscle from twisted nitinol microwire |
| title_full | A torsional artificial muscle from twisted nitinol microwire |
| title_fullStr | A torsional artificial muscle from twisted nitinol microwire |
| title_full_unstemmed | A torsional artificial muscle from twisted nitinol microwire |
| title_short | A torsional artificial muscle from twisted nitinol microwire |
| title_sort | torsional artificial muscle from twisted nitinol microwire |
| url | http://hdl.handle.net/1721.1/116592 https://orcid.org/0000-0002-8251-5432 |
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