Nonlinear stability analysis of piecewise actuated piezoelectric microstructures

SoltanRezaee, M., Bodaghi, M. ORCID: 0000-0002-0707-944X, Farrokhabadi, A. and Hedayati, R., 2019. Nonlinear stability analysis of piecewise actuated piezoelectric microstructures. International Journal of Mechanical Sciences, 160, pp. 200-208. ISSN 0020-7403

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The main objective of this research is to provide a general nonlinear model of adjustable piezoelectric microwires with the ability to tune the stability conditions. In order to increase the controllability and improve system characteristics, only a part of the substrate is electrostatically actuated and the piezoelectric voltage is also applied. The governing equation of equilibrium (EOE) is derived from the principle of minimum total potential energy. The influences of the surface layer, size dependency, piezoelectricity, and dispersion forces are also included simultaneously. To solve the nonlinear differential equation, a numerical method is implemented and the obtained results are validated with available experimental and numerical results. Afterward, a set of parametric studies is carried out to examine the coupled effects of piezo-voltage, length/position of non-actuated pieces, nonlinear curvature, and molecular forces on the microresonators. It is found that the beam deflection and the pull-in voltage have sensitive-dependence on the system behavior. Furthermore, the beam deflection can increase or decrease with consideration of different positions of non-actuated pieces. This research is expected to fill a gap in the state of the art of the piezoelectric microstructures and present relevant results that are instrumental in the investigation of advanced actuated microdevices.

Item Type: Journal article
Publication Title: International Journal of Mechanical Sciences
Creators: SoltanRezaee, M., Bodaghi, M., Farrokhabadi, A. and Hedayati, R.
Publisher: Elsevier
Date: September 2019
Volume: 160
ISSN: 0020-7403
S0020740319303819Publisher Item Identifier
Divisions: Schools > School of Science and Technology
Record created by: Linda Sullivan
Date Added: 01 Jul 2019 10:42
Last Modified: 31 May 2021 15:19

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