Features of amplitude frequency characteristics of ABS plastic 3D printed metamaterial sampleстатья
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Дата последнего поиска статьи во внешних источниках: 17 августа 2021 г.
Аннотация:In this study, we investigated the acoustical properties of custom-designed phononiccrystal-like acoustic metamaterials 3D printed from ABS plastic. The elastic properties of thesemetamaterials were studied experimentally and numerically. The metamaterial consisted of aset of plane parallel lattices the number of which could vary in different samples. Each latticein the sample consisted of 16 parallel square rods. The amplitude-frequency characteristics(AFC) of the fabricated metamaterial sample were measured in the frequency range (35-100)kHz using longitudinal acoustic waves both in air and water. The propagation velocities oflongitudinal and shear acoustic waves of ABS plastic itself were measured prior to theexperiment. The band gaps (stop bands) were detected and investigated while measuring AFCof the metamaterials. We have found that the increase in the number of lattice layers in thesample led to the band gap acoustic wave attenuation coefficient increase along with the bandgap narrowing, while the central frequency of the band gap remained the same. The numericalsimulation of the sample frequency response was carried out in COMSOL. The results ofexperimental studies and numerical simulations were in satisfactory agreement. We have alsoinvestigated the ultrasound scattering diffraction pattern of the sample. The obtained resultscan be used in solid-state physics and material science, to create materials with controlledfrequency-dependent acoustic properties.