EFFECT OF THE INFILL PATTERN ON SOUND ABSORPTION PROPERTIES AND SOME MECHANICAL PROPERTIES OF 3D PRINTED PARTS

Mihai Alin POP, Mihaela COȘNIȚĂ, Sebastian Marian ZAHARIA, Simona Corina MATEI, Cosmin SPÎRCHEZ

Abstract


3D printing and eco materials have a particularly wide applicability in many fields and one of these is custom sound-absorbing panels. The architecture of the voids and the infill value or the infill shape has a major influence on the sound-absorbing properties (coefficient α).  In this paper, four types of void architectures are studied and three shapes of the infill type using polylactic acid as material and Filament Fused Fabrication technology with 60% infill value. Preliminary best results were obtained for cubic infill with α = 66% at 1000 Hz. The aim is to increase the α value by at least 15% and find the best combination and results, and, to determine the resistance to bending and compression.

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References


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