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DINAME2019
DINAME2019
On the evaluation of band gaps created by FDM printed unit cell with piezo disks
Submission Author:
Gabriel Konda Rodrigues , SP
Co-Authors:
Gabriel Konda Rodrigues, Leopoldo de Oliveira
Presenter: Gabriel Konda Rodrigues
doi://10.26678/ABCM.DINAME2019.DIN2019-0087
Abstract
Research in metamaterials gains an ever-increasing interest in the field of noise and vibration control. The ability of creating band gap zones without penalizing other parameters is the main purpose, and goal, of this kind of solution. More recently, researches are also exploring the addition of smart materials, such as piezoelectric patches, on the metamaterials for the improvement of the band gap zone, such as broadening the gap or by making more robust with a deeper valley. These techniques often exploit the usage of some passive circuitry, such a LC shunt, or even going more sophisticated with Digital Signal Processing for active control approaches. However, the band gap border peaks that arise from exploiting local resonant metamaterials are mostly neglected on these studies. In this paper we analyze the mechanical behavior of beam-like structure coupled with periodic unit cells obtained by FDM printing with a piezo disk embedded connected with passive circuitry (LC shunt circuit). Some insights about the modelling parameters of the cells lattice as well as the discussion about the variation of piezoelectric proprieties, such as electromechanical coupling, and their impact on the full smart metastructure behavior are shown. A novel means of addressing the border peaks is also presented. The results section shows the possibility to nullify the border peaks with the piezo disks resulting in a stop band without the penalty of side peaks.
Keywords
metamaterial, periodic structures, smart materials
