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Eliminating Electromechanical Instability In Dielectric Elastomers By Employing Pre-Stretch, Liang Jiang, Tony Betts, David Kennedy, Stephen Jerrams
Eliminating Electromechanical Instability In Dielectric Elastomers By Employing Pre-Stretch, Liang Jiang, Tony Betts, David Kennedy, Stephen Jerrams
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Electromechanical instability (EMI) is one of most common failure modes for dielectric elastomers (DEs). It has been reported that pre-stretching a DE sample can suppress EMI due to strain stiffening taking place for larger strains and a higher elastic modulus are achieved at high stretch ratios when a voltage is applied to the material. In this work, the influence of equi-biaxial stretch on DE secant modulus was studied using VHB 4910 and silicone rubber (SR) composites containing barium titanate (BaTiO3, BT) particles and also dopamine coated BT (DP-BT) particles. The investigation of equi-biaxial deformation and EMI failure for VHB 4910 …