Modeling and simulations of thermoelastic damping in microplates

Ali H. Nayfeh*, Mohammad I. Younis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

164 Scopus citations

Abstract

We present a model and analytical expressions for the quality factors of microplates of general shapes and boundary conditions due to thermoelastic damping. We solve the heat equation for the thermal flow across the microplate, and hence decouple the thermal equation from the plate equation. We utilize a perturbation method to derive an analytical expression for the quality factor of a microplate under electrostatic loading and residual stresses in terms of its structural mode shapes. For the special case of no electrostatic and in-plane loadings, we derive a simple analytical expression for the quality factor, which is independent of the mode shapes. We verify the model by specializing it to a microbeam and comparing the resulting quality factor to that obtained using microbeam models in the literature. We present several results for various modes of rectangular microplates with various boundary conditions.

Original languageEnglish (US)
Pages (from-to)1711-1717
Number of pages7
JournalJournal of Micromechanics and Microengineering
Volume14
Issue number12
DOIs
StatePublished - Dec 2004
Externally publishedYes

ASJC Scopus subject areas

  • Instrumentation
  • Materials Science(all)
  • Mechanics of Materials
  • Computational Mechanics

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