High stress actuation by dielectric elastomer with oil capsules
Though capable of generating a large strain, dielectric elastomer actuators (DEAs) generate only a moderate actuation stress not more than 200kPa, which seriously limits its use as artificial muscles for robotic arm. Enhancement of dielectric strength (greater than 500MV/m) by dielectric oil immersi...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Conference Paper |
| Language: | English |
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2014
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| Online Access: | https://hdl.handle.net/10356/105176 http://hdl.handle.net/10220/20442 |
| _version_ | 1826116162165932032 |
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| author | La, Thanh-Giang Lau, Gih-Keong Shiau, Li-Lynn Tan, Adrian W. Y. |
| author2 | Bar-Cohen, Yoseph |
| author_facet | Bar-Cohen, Yoseph La, Thanh-Giang Lau, Gih-Keong Shiau, Li-Lynn Tan, Adrian W. Y. |
| author_sort | La, Thanh-Giang |
| collection | NTU |
| description | Though capable of generating a large strain, dielectric elastomer actuators (DEAs) generate only a moderate actuation stress not more than 200kPa, which seriously limits its use as artificial muscles for robotic arm. Enhancement of dielectric strength (greater than 500MV/m) by dielectric oil immersion could possibly enable it a larger force generation. Previously, the immersion was done in an oil bath, which limits portability together with DEAs. In this study, we developed portable capsules to enclose oil over the DEA substrate (VHB 4905). The capsules is made of a thinner soft acrylic membrane and they seals dielectric liquid oil (Dow Corning Fluid 200 50cSt). The DEA substrate is a graphiteclad VHB membrane, which is pre-stretched with pure-shear boundary condition for axial actuation. When activated under isotonic condition, the oil-capsule DEA can sustain a very high dielectric field up to 903 MV/m and does not fail; whereas, the dry DEA breaks down at a lower electric field at 570 MV/m. Furthermore, the oil-capsule DEA can produces higher isometric stress change up to 1.05MPa, which is 70% more than the maximum produced by the dry DEA. This study confirmed that oil capping helps DEA achieve very high dielectric strength and generate more stress change for work. |
| first_indexed | 2024-10-01T04:06:50Z |
| format | Conference Paper |
| id | ntu-10356/105176 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:06:50Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1051762023-03-04T17:07:21Z High stress actuation by dielectric elastomer with oil capsules La, Thanh-Giang Lau, Gih-Keong Shiau, Li-Lynn Tan, Adrian W. Y. Bar-Cohen, Yoseph School of Mechanical and Aerospace Engineering SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring DRNTU::Engineering::Aeronautical engineering Though capable of generating a large strain, dielectric elastomer actuators (DEAs) generate only a moderate actuation stress not more than 200kPa, which seriously limits its use as artificial muscles for robotic arm. Enhancement of dielectric strength (greater than 500MV/m) by dielectric oil immersion could possibly enable it a larger force generation. Previously, the immersion was done in an oil bath, which limits portability together with DEAs. In this study, we developed portable capsules to enclose oil over the DEA substrate (VHB 4905). The capsules is made of a thinner soft acrylic membrane and they seals dielectric liquid oil (Dow Corning Fluid 200 50cSt). The DEA substrate is a graphiteclad VHB membrane, which is pre-stretched with pure-shear boundary condition for axial actuation. When activated under isotonic condition, the oil-capsule DEA can sustain a very high dielectric field up to 903 MV/m and does not fail; whereas, the dry DEA breaks down at a lower electric field at 570 MV/m. Furthermore, the oil-capsule DEA can produces higher isometric stress change up to 1.05MPa, which is 70% more than the maximum produced by the dry DEA. This study confirmed that oil capping helps DEA achieve very high dielectric strength and generate more stress change for work. Published version 2014-09-01T02:36:49Z 2019-12-06T21:47:08Z 2014-09-01T02:36:49Z 2019-12-06T21:47:08Z 2014 2014 Conference Paper La, T. G., Lau, G. K., Shiau, L. L., & Tan, A. W. Y. (2014). High stress actuation by dielectric elastomer with oil capsules. Proceedings of SPIE - The International Society for Optical Engineering, 9056. https://hdl.handle.net/10356/105176 http://hdl.handle.net/10220/20442 10.1117/12.2046371 en © 2014 SPIE. This paper was published in Proceedings of SPIE - The International Society for Optical Engineering and is made available as an electronic reprint (preprint) with permission of SPIE. The paper can be found at the following official DOI: [http://dx.doi.org/10.1117/12.2046371]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
| spellingShingle | DRNTU::Engineering::Aeronautical engineering La, Thanh-Giang Lau, Gih-Keong Shiau, Li-Lynn Tan, Adrian W. Y. High stress actuation by dielectric elastomer with oil capsules |
| title | High stress actuation by dielectric elastomer with oil capsules |
| title_full | High stress actuation by dielectric elastomer with oil capsules |
| title_fullStr | High stress actuation by dielectric elastomer with oil capsules |
| title_full_unstemmed | High stress actuation by dielectric elastomer with oil capsules |
| title_short | High stress actuation by dielectric elastomer with oil capsules |
| title_sort | high stress actuation by dielectric elastomer with oil capsules |
| topic | DRNTU::Engineering::Aeronautical engineering |
| url | https://hdl.handle.net/10356/105176 http://hdl.handle.net/10220/20442 |
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