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Electrothermally Actuated Microbeams With Varying Stiffness

[+] Author Affiliations
Sherif Tella, Nouha Alcheikh, Mohammad I. Younis

King Abdullah University of Science and Technology, Thuwal, Saudi Arabia

Paper No. DETC2017-67517, pp. V004T09A020; 6 pages
doi:10.1115/DETC2017-67517
From:
  • ASME 2017 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 4: 22nd Design for Manufacturing and the Life Cycle Conference; 11th International Conference on Micro- and Nanosystems
  • Cleveland, Ohio, USA, August 6–9, 2017
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5816-5
  • Copyright © 2017 by ASME

abstract

We present axially loaded clamped-guided microbeams that can be used as resonators and actuators of variable stiffness, actuation, and anchor conditions. The applied axial load is implemented by U-shaped electrothermal actuators stacked at one of the beams edges. These can be configured and wired in various ways, which serve as mechanical stiffness elements that control the operating resonance frequency of the structures and their static displacement. The experimental results have shown considerable increase in the resonance frequency and mid-point deflection of the microbeam upon changing the end conditions of the beam. These results can be promising for applications requiring large deflection and high frequency tunability, such as filters, memory devices, and switches. The experimental results are compared to multi-physics finite-element simulations showing good agreement among them.

Copyright © 2017 by ASME
Topics: Stiffness , Microbeams

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