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Evidencing broadband filtration and steering of guided waves through porous phononic plates with optimized design

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Abstract
Phononic crystal plates (PhPs) have astonishing characteristic in manipulation of elastodynamic guided waves for design of low-loss acoustic metamaterial devices which are applicable e.g. in structural health monitoring or air-borne wireless communication. The periodic microstructure of PhPs induces strong anisotropy at the wavelengths that are comparable to the lattice periodicity and enables controllability of an incident wave at relevant frequency ranges. The prominent feature of phononic crystals is the existence of frequency bandgaps over which the waves are stopped, or are resonated and guided within designed defects. Therefore, maximized bandgaps of PhPs are desirable to enhance their controllable frequency range. Porous PhPs produced through perforation of a uniform background plate, in which the porous interfaces act as strong reflectors of wave energy, are relatively easy to produce. However, optimization of such PhPs for maximized bandgap naturally leads to infeasible (i.e. discontinuous) designs or designs with delicate (i.e. compliant) interconnecting features. This paper presents porous PhPs with superior designs which have been achieved through a systematic topology optimization. Two competing objectives are considered in the optimization procedure: (i) widest bandgap of guided wave modes and (ii) maximized stiffness. Several optimized topologies are selected and manufactured by water-jetting an aluminum plate and laser cutting a Plexiglas (PMMA) plate, and their performance in filtration and steering of guided waves is verified as compared to calculated dispersion curves. Further, the stiffness and strain field of the optimized topologies under tensile loading are evaluated and compared to numerical prediction.
Keywords
Phononic, Plate, Porous, Guided Wave, Bandgap, Stiffness

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MLA
Hedayatrasa, Saeid, et al. “Evidencing Broadband Filtration and Steering of Guided Waves through Porous Phononic Plates with Optimized Design.” Ultrasonics, International Congress, Abstracts, 2019.
APA
Hedayatrasa, S., Kersemans, M., Abhary, K., & Van Paepegem, W. (2019). Evidencing broadband filtration and steering of guided waves through porous phononic plates with optimized design. In Ultrasonics, International congress, Abstracts. Bruges, Belgium.
Chicago author-date
Hedayatrasa, Saeid, Mathias Kersemans, Kazem Abhary, and Wim Van Paepegem. 2019. “Evidencing Broadband Filtration and Steering of Guided Waves through Porous Phononic Plates with Optimized Design.” In Ultrasonics, International Congress, Abstracts.
Chicago author-date (all authors)
Hedayatrasa, Saeid, Mathias Kersemans, Kazem Abhary, and Wim Van Paepegem. 2019. “Evidencing Broadband Filtration and Steering of Guided Waves through Porous Phononic Plates with Optimized Design.” In Ultrasonics, International Congress, Abstracts.
Vancouver
1.
Hedayatrasa S, Kersemans M, Abhary K, Van Paepegem W. Evidencing broadband filtration and steering of guided waves through porous phononic plates with optimized design. In: Ultrasonics, International congress, Abstracts. 2019.
IEEE
[1]
S. Hedayatrasa, M. Kersemans, K. Abhary, and W. Van Paepegem, “Evidencing broadband filtration and steering of guided waves through porous phononic plates with optimized design,” in Ultrasonics, International congress, Abstracts, Bruges, Belgium, 2019.
@inproceedings{8622591,
  abstract     = {{Phononic crystal plates (PhPs) have astonishing characteristic in manipulation of elastodynamic guided waves for design of low-loss acoustic metamaterial devices which are applicable e.g. in structural health monitoring or air-borne wireless communication. The periodic microstructure of PhPs induces strong anisotropy at the wavelengths that are comparable to the lattice periodicity and enables controllability of an incident wave at relevant frequency ranges. The prominent feature of phononic crystals is the existence of frequency bandgaps over which the waves are stopped, or are resonated and guided within designed defects. Therefore, maximized bandgaps of PhPs are desirable to enhance their controllable frequency range. Porous PhPs produced through perforation of a uniform background plate, in which the porous interfaces act as strong reflectors of wave energy, are relatively easy to produce. However, optimization of such PhPs for maximized bandgap naturally leads to infeasible (i.e. discontinuous) designs or designs with delicate (i.e. compliant) interconnecting features.

This paper presents porous PhPs with superior designs which have been achieved through a systematic topology optimization. Two competing objectives are considered in the optimization procedure: (i) widest bandgap of guided wave modes and (ii) maximized stiffness. Several optimized topologies are selected and manufactured by water-jetting an aluminum plate and laser cutting a Plexiglas (PMMA) plate, and their performance in filtration and steering of guided waves is verified as compared to calculated dispersion curves. Further, the stiffness and strain field of the optimized topologies under tensile loading are evaluated and compared to numerical prediction.}},
  author       = {{Hedayatrasa, Saeid and Kersemans, Mathias and Abhary, Kazem and Van Paepegem, Wim}},
  booktitle    = {{Ultrasonics, International congress, Abstracts}},
  keywords     = {{Phononic,Plate,Porous,Guided Wave,Bandgap,Stiffness}},
  language     = {{eng}},
  location     = {{Bruges, Belgium}},
  pages        = {{1}},
  title        = {{Evidencing broadband filtration and steering of guided waves through porous phononic plates with optimized design}},
  year         = {{2019}},
}