Magnet-polymer composite transducers
Current actuation technologies do not provide a satisfactory solution to the requirement of having a muscle like motion, such motion will be very useful in robotics, MEMS and biomedical applications, etc. Hence a magnetically actuated material was studied as an “artificial muscle”. The material is a...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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2011
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| Online Access: | https://hdl.handle.net/10356/46443 |
| _version_ | 1811692766020763648 |
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| author | Nguyen, Quang Vinh |
| author2 | Raju Vijayaraghavan Ramanujan |
| author_facet | Raju Vijayaraghavan Ramanujan Nguyen, Quang Vinh |
| author_sort | Nguyen, Quang Vinh |
| collection | NTU |
| description | Current actuation technologies do not provide a satisfactory solution to the requirement of having a muscle like motion, such motion will be very useful in robotics, MEMS and biomedical applications, etc. Hence a magnetically actuated material was studied as an “artificial muscle”. The material is a composite of a soft polymer with magnetic material as the filler (Magpol). Magpol composites are a new class of bio-inspired smart soft transducers for morphing, damping, and artificial muscle applications. Magpol exhibits large changes in shape and physical properties in response to an external magnetic field. This shape changing behavior of Magpol in an external magnetic field was studied and actuation performance investigated. The large change in electrical resistivity driven by the shape change was also examined for sensing applications. This versatile combination of actuation and sensing behavior results in attractive transducers.
Various actuation modes, including contraction, elongation and deflection were studied. These actuation modes can be combined to produce complex motions. A novel coiling mode was observed. Simply by changing boundary conditions, Magpol can exhibit a change in actuation mode from axial contraction to a novel coiling mechanism. The magnetic buckling which results in coiling was studied by computer simulation and analytical modeling. The analytically predicted magnetic fields for buckling agreed well with experimental values. The relationship between strain and magnetic field suggested that post buckling behavior is a stable symmetric bifurcation, which is useful for continuous actuation. |
| first_indexed | 2024-10-01T06:41:00Z |
| format | Thesis |
| id | ntu-10356/46443 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:41:00Z |
| publishDate | 2011 |
| record_format | dspace |
| spelling | ntu-10356/464432023-03-04T16:40:50Z Magnet-polymer composite transducers Nguyen, Quang Vinh Raju Vijayaraghavan Ramanujan School of Materials Science & Engineering DRNTU::Engineering::Materials::Magnetic materials Current actuation technologies do not provide a satisfactory solution to the requirement of having a muscle like motion, such motion will be very useful in robotics, MEMS and biomedical applications, etc. Hence a magnetically actuated material was studied as an “artificial muscle”. The material is a composite of a soft polymer with magnetic material as the filler (Magpol). Magpol composites are a new class of bio-inspired smart soft transducers for morphing, damping, and artificial muscle applications. Magpol exhibits large changes in shape and physical properties in response to an external magnetic field. This shape changing behavior of Magpol in an external magnetic field was studied and actuation performance investigated. The large change in electrical resistivity driven by the shape change was also examined for sensing applications. This versatile combination of actuation and sensing behavior results in attractive transducers. Various actuation modes, including contraction, elongation and deflection were studied. These actuation modes can be combined to produce complex motions. A novel coiling mode was observed. Simply by changing boundary conditions, Magpol can exhibit a change in actuation mode from axial contraction to a novel coiling mechanism. The magnetic buckling which results in coiling was studied by computer simulation and analytical modeling. The analytically predicted magnetic fields for buckling agreed well with experimental values. The relationship between strain and magnetic field suggested that post buckling behavior is a stable symmetric bifurcation, which is useful for continuous actuation. DOCTOR OF PHILOSOPHY (MSE) 2011-12-06T03:11:47Z 2011-12-06T03:11:47Z 2011 2011 Thesis Nguyen, Q. V. (2011). Magnet-polymer composite transducers. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/46443 10.32657/10356/46443 en 179 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Materials::Magnetic materials Nguyen, Quang Vinh Magnet-polymer composite transducers |
| title | Magnet-polymer composite transducers |
| title_full | Magnet-polymer composite transducers |
| title_fullStr | Magnet-polymer composite transducers |
| title_full_unstemmed | Magnet-polymer composite transducers |
| title_short | Magnet-polymer composite transducers |
| title_sort | magnet polymer composite transducers |
| topic | DRNTU::Engineering::Materials::Magnetic materials |
| url | https://hdl.handle.net/10356/46443 |
| work_keys_str_mv | AT nguyenquangvinh magnetpolymercompositetransducers |