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Experimental study on permittivity of acrylic dielectric elastomer

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6 Author(s)
Pramanik, B. ; Dept. of Mech. Eng., Indian Inst. of Technol. Patna, Patna, India ; Sahu, R.K. ; Bhaumik, S. ; Patra, K.
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This paper reports the experimental study on the frequency and stretch dependency of permittivity of a commercially available acrylic dielectric elastomer (VHB 4910) film. The procedure for preparing samples with different thickness using in-house developed uniaxially stretching device is described. Copper tapes are implanted on two opposite sides of a stretched elastomer film and permittivity of this material is estimated from measured capacitance using LCR meter. Variations of permittivity of this material with different pre-strain value and with different applied voltage frequency are studied. Results show that the permittivity of the material decreases with increasing frequency and increasing pre-strain value. The study would be useful for estimation of frequency and strain dependent actuation pressure of a dielectric elastomer actuator.

Published in:

Properties and Applications of Dielectric Materials (ICPADM), 2012 IEEE 10th International Conference on the

Date of Conference:

24-28 July 2012