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doi:10.22028/D291-30891
Title: | Fast model-based design of large stroke dielectric elastomer membrane actuators biased with pre-stressed buckled beams |
Author(s): | Seelecke, Stefan Rizzello, Gianluca Hau, Steffen Loew, Philipp Bruch, Daniel |
Editor(s): | Bar-Cohen, Yoseph |
Language: | English |
Title: | Electroactive Polymer Actuators and Devices (EAPAD) XX |
Pages: | 8 |
Publisher/Platform: | SPIE |
Year of Publication: | 2018 |
Title of the Conference: | SPIE Smart Structures and Materials + Nondestructive Evaluation 2018 |
Place of the conference: | Denver, Colorado, United States |
Publikation type: | Conference Paper |
Abstract: | Dielectric Elastomer Actuators (DEAs) represent a promising alternative technology for common small- and micro-drives, due to their lightweight, high energy density, high design flexibility, and silent operations. In order to obtain a stroke, membrane DEAs need to be preloaded with mechanical biasing elements. The use of negative stiffness mechanisms results in a relatively large stroke, in comparison with conventional biasing systems based on masses or linear springs. Centrally loaded, pre-stressed buckled beams show this negative stiffness behavior in a well-defined range. In particular, their force-displacement characteristics is highly nonlinear and depends on the beam geometry and axial pre-compression. 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. |
DOI of the first publication: | 10.1117/12.2296558 |
URL of the first publication: | https://www.spiedigitallibrary.org/conference-proceedings-of-spie/10594/2296558/Fast-model-based-design-of-large-stroke-dielectric-elastomer-membrane/10.1117/12.2296558.short |
Link to this record: | hdl:20.500.11880/29111 http://dx.doi.org/10.22028/D291-30891 |
ISBN: | 978-1-5106-1685-1 978-1-5106-1684-4 |
Date of registration: | 11-May-2020 |
Notes: | Proceedings of SPIE ; volume 10594 |
Faculty: | NT - Naturwissenschaftlich- Technische Fakultät |
Department: | NT - Systems Engineering |
Professorship: | NT - Prof. Dr. Stefan Seelecke |
Collections: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
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