Archives of Metallurgy and Materials (Apr 2024)

Influence of PNM-0.38PT Defect on Transmission of Multilayer Periodic Phononic Structure

  • S. Garus,
  • M. Kuczyński,
  • A. Kysiak,
  • J. Garus,
  • W. Sochacki

DOI
https://doi.org/10.24425/amm.2024.149096
Journal volume & issue
Vol. vol. 69, no. No 1
pp. 319 – 323

Abstract

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In this work, the impact of the defect on the transmission of a mechanical wave in a periodic quasi-one-dimensional structure was investigated. The multilayer structure was made of PLA and air, while the defect layer was PNM-0.38PT with a significantly higher value of acoustic impedance in relation to the materials of the base structure. The influence of the position of the defect in the structure and its thickness was analysed. Transmission as a function of frequency was determined using the Transfer Matrix Method algorithm. The work showed the presence of band gaps in the analyzed structures. The influence of the symmetry of structures and substructures on the transmission of a mechanical wave was investigated. The influence of the number of layers with very low acoustic impedance (air) on the number of high transmission peaks with a small half-width was also demonstrated.

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