This paper provides a fast model-based design approach for large stroke DEA systems biased with pre-stressed and centrally loaded buckled beams. The method is based on a Finite Element model of a buckled beam, implemented in COMSOL Multiphysics®. Large deformations are considered in order to accurately design compact DEA systems with highly compressed beams. Stroke optimization is achieved by combining nonlinear beam elements with linear spring mechanisms. This method allows the calculation of the required beam geometry and pre-compression in order to achieve the desired characteristics of the preloading mechanism. The proposed methodology is validated by numerous simulations.
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Daniel Bruch, Steffen Hau, Philipp Loew, Gianluca Rizzello, Stefan Seelecke, "Fast model-based design of large stroke dielectric elastomer membrane actuators biased with pre-stressed buckled beams," Proc. SPIE 10594, Electroactive Polymer Actuators and Devices (EAPAD) XX, 105940H (27 March 2018);