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- Asperity contact model (1)
- Bounce mitigation (1)
- Casimir force (1)
- Contact bouncing (1)
- Dielectric elastomer (1)
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- Electromechanical coupling (1)
- Electrostatic (1)
- Frequency tuning (1)
- Harmonic dither (1)
- Harmonic perturbations (1)
- MEMS (1)
- Multiple relaxation (1)
- NEMS (1)
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- Resonator (1)
- Secondary actuator (1)
- Surface effects (1)
- Switch (1)
- Transient response (1)
- Uncertainty quantification (1)
- Van der Waals force (1)
- Viscoelasticity (1)
Articles 1 - 2 of 2
Full-Text Articles in Mechanical Engineering
Bouncing Dynamics Of A Class Of Mem/Nem Switching Systems, Mohamed Bognash
Bouncing Dynamics Of A Class Of Mem/Nem Switching Systems, Mohamed Bognash
Electronic Thesis and Dissertation Repository
The aim of the present research is to understand the bouncing dynamic behavior of NEM/MEM switches in order to improve the switch performance and reliability. It is well known that the bouncing can dramatically degrade the switch performance and life; hence, in the present study, bouncing dynamics of a cantilever-based NME/MEM switch has been studied in detail. To this end, a model of a MEM switch that incorporates electrostatic force, squeeze film air damping force as well as asperity-based contact force has been proposed for an electrostatically actuated switch. An actuation force due to piezoelectric effects is further included in …
Effect Of Material Viscoelasticity On Frequency Tuning Of Dielectric Elastomer Membrane Resonators, Liyang Tian
Effect Of Material Viscoelasticity On Frequency Tuning Of Dielectric Elastomer Membrane Resonators, Liyang Tian
Electronic Thesis and Dissertation Repository
Dielectric elastomers (DEs) capable of large voltage-induced deformation show promise for applications such as resonators and oscillators. However, the dynamic performance of such vibrational devices is not only strongly affected by the nonlinear electromechanical coupling and material hyperelasticity, but also significantly by the material viscoelasticity. The material viscoelasticity of DEs originates from the highly mobile polymer chains that constitute the polymer networks of the DE. Moreover, due to the multiple viscous polymer subnetworks, DEs possess multiple relaxation processes. Therefore, in order to predict the dynamic performance of DE-based devices, a theoretical model that accounts for the multiple relaxation processes is …