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        Estimation and validation of maxwell stress of planar dielectric elastomer actuators

        Raj Kumar Sahu,Abhishek Saini,Dilshad Ahmad,Karali Patra,Jerzy Szpunar 대한기계학회 2016 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.30 No.1

        In this paper, Maxwell stress of circular planar actuator at different applied voltages was estimated and then validated with the uniaxialcompression test of three different dielectric elastomers (VHB, silicone and natural rubber). Pelrine’s equation was revisited to estimateMaxwell stress which causes the actuation in the planar direction. More precise and accurate estimation of Maxwell stress could be madein this work by considering variation of dielectric constant with respect to frequency and pre-strain. Estimated Maxwell stress was validatedthrough (i) out-of-plane strain or thickness strain obtained from measured area strain considering constant volume deformation, and(ii) out-of-plane mechanical compressive test results. The estimated Maxwell stress agrees well with the corresponding experimentalcompressive stress values for different pre-straining cases considered in this work.

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