Dependence of Actuation Strain of Dielectric Elastomer on Equi-biaxial, Pure Shear and Uniaxial Modes of Pre-stretching

International Conference on Advances in Materials and Manufacturing Applications 2017

Kumar, Ajeet^1 ; Ahmad, Dilshad^1 ; Patra, Karali^1

Department of Mechanical Engineering, Indian Institute of Technology Patna, Bihta Campus, Patna, Bihar

801103, India^1

关键词: Dielectric elastomers;    Energy harvesting device;    Pre-stretching;    Pure shear;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/310/1/012104/pdf
DOI  :  10.1088/1757-899X/310/1/012104

来源: IOP

【 摘 要 】

A dielectric elastomer is capable of large deformation under three basic modes of deformation: equi-biaxial, pure shear and uniaxial. Pre-stretching of dielectric elastomer improves the actuation strain appreciably. Experimental results shows that pre-stretching using equal biaxial mode can result to higher actuation strain compared to other two modes of stretching, i.e., uniaxial and pure shear. However, analysis of the experimental results shows that the actuation strain is independent of the modes of pre-stretching rather it is dependent upon the thickness stretch. For same thickness stretch at a particular voltage, the actuation strain is almost similar for all pre-stretching modes. Power trend lines are obtained to predict the actuation strain at any thickness stretch for a particular voltage. The present analysis opens the door to easily design the actuators, sensors and energy harvesting devices.