Reference : Microbeam pull-in voltage topology optimization including material deposition constraint
Scientific journals : Article
Engineering, computing & technology : Electrical & electronics engineering
Engineering, computing & technology : Aerospace & aeronautics engineering
Engineering, computing & technology : Mechanical engineering
Engineering, computing & technology : Multidisciplinary, general & others
http://hdl.handle.net/2268/6554
Microbeam pull-in voltage topology optimization including material deposition constraint
English
Lemaire, Etienne mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Ingénierie des véhicules terrestres > >]
Rochus, Véronique mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]
Golinval, Jean-Claude mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures >]
Duysinx, Pierre mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Ingénierie des véhicules terrestres >]
2008
Computer Methods in Applied Mechanics & Engineering
Elsevier Science
197
4040-4050
Yes (verified by ORBi)
International
0045-7825
Lausanne
Switzerland
[en] Topology optimization ; Electromechanical coupling ; Pull-in ; Manufacturing constraint
[en] Because of the strong coupling between mechanical and electrical phenomena existing in electromechanical microdevices, some of them experience, above a given driving voltage, an unstable behavior called pull-in effect. The present paper investigates the application of topology optimization to electromechanical microdevices for the purpose of delaying this unstable behavior by maximizing their pull-in voltage. Within the framework of this preliminary study, the pull-in voltage maximization procedure is developed on the basis of electromechanical microbeams reinforcement topology design problem. The proposed sensitivity analysis requires only the knowledge of the microdevice pull-in state and of the first eigenmode of the tangent stiffness matrix. As the pull-in point research is a highly non-linear problem, the analysis is based on a monolithic finite element formulation combined with a normal flow algorithm (homotopy method). An application of the developed method is proposed and the result is compared to the one obtained using a linear compliance optimization. Moreover, as the results provided by the developed method do not comply with manufacturing constraints, a deposition process constraint is added to the optimization problem and its effect on the final design is also tested.
Communauté française de Belgique - CfB
ARC03/08-298 "Modeling, Multiphysics Simulation and Optimization of Coupled Problems - Application to Micro Electro-Mechanical Systems"
http://hdl.handle.net/2268/6554

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