Two-dimensional (2D) equations of piezoelectric bimorph nano-actuators are presented which take account of the surface effect. The surface effect of the bimorph structure is treated as a surface layer with zero thickness. The influence on the plate's overall properties resulted from the surface elasticity and piezoelectricity is modeled by a spring force exerting on the boundary of the bulk core. Using the derived 2D equations, the anti-parallel piezoelectric bimorph nano-actuators of both cantilever and simply supported plate type are investigated theoretically. Numerical results show that the effective properties and the deflections of the antiparallel bimorph nano-actuators are size-dependent. The deflection at the resonant frequency achieves nearly 50 times as that under the static driving voltage.
Modeling of Piezoelectric Bimorph Nano-Actuators With Surface Effects
Manuscript received December 12, 2012; final manuscript received December 31, 2012; accepted manuscript posted February 19, 2013; published online August 21, 2013. Editor: Yonggang Huang.
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Zhang, C., Zhang, C., and Chen, W. (August 21, 2013). "Modeling of Piezoelectric Bimorph Nano-Actuators With Surface Effects." ASME. J. Appl. Mech. November 2013; 80(6): 061015. https://doi.org/10.1115/1.4023693
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