Active elastomer components based on dielectric elastomers

A new design concept developed at the Fraunhofer LBF allows dielectric elastomers to be integrated efficiently as load-bearing components, serving as both actuator and sensor at the same time. Since the concept is based on perforated metal electrodes with high electrical conductivities, it can also be used for highly dynamic and acoustic applications to which dielectric elastomers would not usually lend themselves. This article focuses on the adaptive properties of these elastomer components. By applying a static voltage, the effective complex elastic modulus and the loss angle of the composite material can be adjusted within certain limits and varied as required. Experimental results are provided to illustrate this approach and the potential of this new technology for innovative solutions is discussed.