In this paper, we investigate the coupled band gaps created by the locking phenomenon between the electrical and flexural waves in piezoelectric composite plates. To do that, the distributed piezoelectric materials should be interconnected via a ‘global’ electric network rather than the respective ‘local’ impedance. Once the uncoupled electrical wave has the same wavelength and opposite group velocity as the uncoupled flexural wave, the desired coupled band gap emerges. The Wave Finite Element Method (WFEM) is used to investigate the evolution of the coupled band gap with respect to propagation direction and electric parameters. Further, the bandwidth and directionality of the coupled band gap are compared with the LR and Bragg gaps. An indicator termed ratio of single wave (RSW) is proposed to determine the effective band gap for a given deformation (electric, flexural, etc.). We show that the coupled band gap, despite directional, can be much wider than the LR gap with the same overall inductance. This might lead to an alternative to create sub-wavelength band gaps.
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ASME 2018 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 10–12, 2018
San Antonio, Texas, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-5194-4
PROCEEDINGS PAPER
Coupled Band Gaps in the Piezoelectric Composite Plate With Interconnected Electric Impedance
Jun Li
Jun Li
Imperial College London, London, UK
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Lin Li
Beihang University, Beijing, China
Zhou Jiang
Beihang University, Beijing, China
Yu Fan
Beihang University, Beijing, China
Jun Li
Imperial College London, London, UK
Paper No:
SMASIS2018-7948, V001T03A005; 10 pages
Published Online:
November 14, 2018
Citation
Li, L, Jiang, Z, Fan, Y, & Li, J. "Coupled Band Gaps in the Piezoelectric Composite Plate With Interconnected Electric Impedance." Proceedings of the ASME 2018 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. Volume 1: Development and Characterization of Multifunctional Materials; Modeling, Simulation, and Control of Adaptive Systems; Integrated System Design and Implementation. San Antonio, Texas, USA. September 10–12, 2018. V001T03A005. ASME. https://doi.org/10.1115/SMASIS2018-7948
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