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  • Dielectric Elastomer Actuators - Stability Analysis

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    In the field of actuator and sensor application the electro-mechanical coupling is used to transfer an electrical excitation into a mechanical deformation and viceversa. This kind of coupling is normally realized on an atomistic level by materials like piezoelectric ceramics. In this type of materials the deformations are very limited because of their ceramic character. To achieve large deformations, the use of so...
    Tags: dielectric_elastomerfinite_elementstability
    Added by Martin on 2011-07-12 12:01


    Dielectric Elastomer Actuators - Stability Analysis In the field of actuator and sensor application the electro-mechanical coupling is used to transfer an electrical excitation into a mechanical deformation and viceversa. This kind of coupling is normally realized on an atomistic level by materials like piezoelectric ceramics. In this type of materials the deformations are very limited because of their ceramic character. To achieve large deformations, the use of so called soft dielectrics can be considered. Here the coupling is realized through the combination of soft elastomers and electro-static forces.In the model presented here, the electro-mechanical coupling for soft dielectrics is implemented in the context of the non-linear finite element method. The main focus here is not the implementation but the analysis of the stability for this coupling problem. This analysis is motivated by the fact, that the electro-static force can exceed the mechanical forces at a certain deformation.