Sound Absorption Performance and Mechanical Properties of the 3D-Printed Bio-Degradable Panels

• DOI: 10.3390/polym15183695
• Publication Date: 2023-09-07T14:09:50Z
• Authors: Sebastian-Marian ...; Mihai Alin Pop; Mihaela Cosnita; Cătălin Croitoru; Simona Matei; Cosmin Spîrchez
• Keywords: Infill; Polylactic Acid; 3d printed; Noise reduction coefficient

The 3D printing process allows complex structures to be obtained with low environmental impact using biodegradable materials. This work aims develop and acoustically characterize 3D-printed panels three types of materials, each manufactured at five infill densities (20%, 40%, 60%, 80% 100%) internal configurations based on circular, triangular, corrugated profiles. highest absorption coefficient values (α = 0.93) were from the acoustic tests for polylactic acid material ground birch wood particles in triangular configuration an density 40%. profile showed best performance materials analysed and, point view mechanical tests, it was highlighted that same presented resistance both compression (40 MPa) three-point bending (50 MPa). 40% 60% gave regardless analyzed. higher strength samples simple filament compared particles. standard defects failure modes interior could observed microscopic analysis panels. Based results determined properties, one application area these automotive aerospace industries.