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A stochastic 3-Scale approach to study the thermomechanical damping of MEMS
Wu, Ling; Lucas, Vincent; Nguyen, Van Dung et al.
2016
 

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Keywords :
Multi-scale; Stochastic; polycrystalline; Thermo-mechancs; MEMS
Abstract :
[en] A stochastic 3-scale approach is developed to study the thermo-elastic quality factor (Q) of micro-electromechanical systems (MEMS) resonators. Thermo-elastic damping is one of the major dissipation mechanisms in high-Q micro-resonators, which may have detrimental effects on the quality factor, and has to be predicted accurately. Since material uncertainties are inherent to and unavoidable in MEMS, the effects of those variations have to be considered in the numerical models. To this end, a coupled thermo-mechanical stochastic 3-scale approach is considered. Thermo-mechanical micro-models of poly-silicon materials are used to represent micro-structure realizations. A computational stochastic homogenization procedure is then applied on these statistical volume elements to obtain the probabilistic distribution of the elasticity tensor, thermal expansion and conductivity tensors at the meso-scale. Spatially correlated meso-scale random fields are then generated in order to represent the probabilistic behavior of the homogenized material properties, feeding macro-scale stochastic finite element simulations.
Research center :
Computational & Multiscale Mechanics of Materials
Disciplines :
Materials science & engineering
Mechanical engineering
Author, co-author :
Wu, Ling ;  Université de Liège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3)
Lucas, Vincent ;  Université de Liège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3)
Nguyen, Van Dung  ;  Université de Liège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3)
Paquay, Stéphane;  Open Engineering S.A.
Golinval, Jean-Claude  ;  Université de Liège > Département d'aérospatiale et mécanique > LTAS - Vibrations et identification des structures
Noels, Ludovic  ;  Université de Liège > Département d'aérospatiale et mécanique > Computational & Multiscale Mechanics of Materials (CM3)
Voicu, Rodica;  IMT-Bucharest
Baracu, Angela;  IMT-Bucharest
Muller, Raluca;  IMT-Bucharest
Language :
English
Title :
A stochastic 3-Scale approach to study the thermomechanical damping of MEMS
Publication date :
20 June 2016
Event name :
Faculty of Science, Technology and Communication; Mathematics Research Unit Seminars
Event organizer :
University of Luxembourg
Event place :
Luxembourg, Luxembourg
Event date :
20 June, 2016
Name of the research project :
3SMVIB: The research has been funded by the Walloon Region under the agreement no 1117477 (CT-INT 2011-11-14) in the context of the ERA-NET MNT framework.
Funders :
Service public de Wallonie : Direction générale opérationnelle de l'économie, de l'emploi et de la recherche - DG06
Available on ORBi :
since 03 August 2016

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