Ultrasonic bandgaps in 3D-printed periodic ceramic microlattices
2017; Elsevier BV; Volume: 82; Linguagem: Inglês
10.1016/j.ultras.2017.07.017
ISSN1874-9968
AutoresAlena Kruisová, Martin Ševčík, Hanuš Seiner, Petr Sedlák, Benito Román‐Manso, P. Miranzo, Manuel Belmonte, Michal Landa,
Tópico(s)Noise Effects and Management
ResumoThe transmission of longitudinal ultrasonic waves through periodic ceramic microlattices fabricated by Robocasting was measured in the 2–12 MHz frequency range. It was observed that these structures (scaffolds of tetragonal and hexagonal spatial arrangements with periodicity at length-scales of ∼100 μm) exhibit well-detectable acoustic band structures with bandgaps. The locations of these gaps at relatively high frequencies were shown to be in close agreement with the predictions of numerical models, especially for tetragonal scaffolds. For hexagonal scaffolds, a mixing between longitudinal and shear polarizations of the propagation modes was observed in the model, which blurred the matching of the calculated band structures with the experimentally measured bandgaps.
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