University of Twente Student Theses
The characterisation of an electrospun PVDF terpolymer for the design of a piezoelectric variable stiffness actuator
Visschers, S.H.J. (2015) The characterisation of an electrospun PVDF terpolymer for the design of a piezoelectric variable stiffness actuator.
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| Abstract: | Piezoelectric polymers are known for over 40 years now. polyvinyldifluoride and its copolymers have been applied to the field of electromechanical actuation, sensing, memory, and more. The terpolymer of vinyldifluoride, P(VDF-TrFE-CTFE), is a newly developed piezoelectric polymer material that is designed to be more electro active. To make use of this material in the design of a (variable stiffness) actuator, the mechanical and electrical properties of this material are characterised using specifically designed set-ups. The coupling between the two domains is investigated. The samples under investigation are unimorphs layered with support materials with thicknesses in the order of micrometres. Electric fields are applied to the samples by a modulated high-voltage source. Strain measurements are obtained using either visual data from a microscope or a laser reflection measurement. The force exerted by the samples is too small for conventional force measurement devices, so a specifically suitable contraption has to be designed to measure this force. Using these datasets, the electromechanical behaviour of the material can be characterised. |
| Item Type: | Essay (Bachelor) |
| Faculty: | EEMCS: Electrical Engineering, Mathematics and Computer Science |
| Programme: | Electrical Engineering BSc (56953) |
| Link to this item: | https://purl.utwente.nl/essays/93914 |
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