In this paper, a three-dimensional finite element (FE) model is developed to design a vibrating bimorph piezoelectric cantilever beam for energy harvesting. A parametric study of electric power generated as a function of the dielectric constant, transverse piezoelectric strain constant, length and thickness of the piezoelectric material, is conducted for a time-harmonic surface pressure load. The reference piezoelectric material used in the design is Lead Zirconate Titanate (PZT-5H). Complete transversely isotropic elastic and piezoelectric properties are assigned to the bimorph layers with brass chosen as the substrate material in the three-dimensional finite element model. The numerical analysis shows that a uniform decrease in thickness and length coverage of the piezoelectric layers results in a nonlinear reduction in power amplitude, which suggests optimal values. Using design of experiments (DOE), a study was conducted to determine the sensitivity of power with respect to the geometric and material variables.
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ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 28–31, 2011
Washington, DC, USA
Conference Sponsors:
- Design Engineering Division and Computers and Information in Engineering Division
ISBN:
978-0-7918-5478-5
PROCEEDINGS PAPER
Effects of Geometric and Material Properties on Electrical Power Harvested From a Bimorph Piezoelectric Cantilever Beam
Nataraj Chandrasekharan,
Nataraj Chandrasekharan
Clemson University, Clemson, SC
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Lonny Thompson
Lonny Thompson
Clemson University, Clemson, SC
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Nataraj Chandrasekharan
Clemson University, Clemson, SC
Jaehyung Ju
Clemson University, Clemson, SC
Lonny Thompson
Clemson University, Clemson, SC
Paper No:
DETC2011-48003, pp. 273-282; 10 pages
Published Online:
June 12, 2012
Citation
Chandrasekharan, N, Ju, J, & Thompson, L. "Effects of Geometric and Material Properties on Electrical Power Harvested From a Bimorph Piezoelectric Cantilever Beam." Proceedings of the ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 1: 23rd Biennial Conference on Mechanical Vibration and Noise, Parts A and B. Washington, DC, USA. August 28–31, 2011. pp. 273-282. ASME. https://doi.org/10.1115/DETC2011-48003
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