Volume 106, Number 6, June 2014
|Number of page(s)||4|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||27 June 2014|
Electromechanical deformation of dielectric elastomer in two types of pre-stretch
1 Department of Mechanical Engineering, Xi'an Jiaotong University - 28 Xianing Road, Xi'an, 710049, China
2 State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University Xi'an, 710049, China
3 National key Laboratory of Aerodynamics Design and Research, Northwestern Polytechnical University Xi'an, 710072, China
Received: 9 April 2014
Accepted: 11 June 2014
A pre-stretched dielectric elastomer is capable of large deformation, when subject to voltage. This paper investigates the effect of two types of pre-stretch: by strain and by stress. The difference is compared and discussed using thermodynamics models. The significance of the pre-stretch in actuation is explained by examining the true stress in actuation. Under both pre-stretch strategies, during the actuation, the dielectric elastomer exhibits hysteresis loops due to snap-through but differs in shape and physical quantity. With pre-stretch by strain, the dielectric elastomer features a discontinuous snap in stretch while with the stress the voltage snaps.
PACS: 77.84.Jd – Polymers; organic compounds / 61.41.+e – Polymers, elastomers, and plastics / 77.65.-j – Piezoelectricity and electromechanical effects
© EPLA, 2014
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