The potential of the manufacturing technologies, such as Selective Laser Melting (SLM) and Digital Light Processing (DLP), has made it feasible today to realize particular structures in a variety of materials and geometrical dimensions, that were unattainable using conventional production methods. Nevertheless, several features of the manufacturing technology assume a fundamental role on the acoustic response of the realized material. In this work, the influence of the manufacturing processes in the realization of acoustic metamaterial with extended surfaces has been investigated. The acoustic behaviour of the metamaterial is analytically described by using the Transfer Matrix Method (TMM), while numerical modelling is performed with a Finite Element software (FEM). Experimental investigations have been carried out on different samples of the designed metamaterial made by 3D-printing and Laser technology on behalf of the Company Z Lab (Cerea, VR). Each sample has been made with different features and surface finish. The experimental results are reported in terms of the sound absorption coefficient at normal incidence and Transmission Loss.
INFLUENCE OF MANUFACTURING TECHNOLOGY ON THE ACOUSTIC PERFORMANCE OF METAMATERIALS / Di Giulio, E.; Napolitano, M.; Romano, R. A.; Scofano, A.; Dragonetti, R.. - In: PROCEEDINGS OF FORUM ACUSTICUM. - ISSN 2221-3767. - (2023). (Intervento presentato al convegno 10th Convention of the European Acoustics Association, EAA 2023 tenutosi a Politecnico di Torino, Via Paolo Borsellino, 53/N, ita nel 2023).
INFLUENCE OF MANUFACTURING TECHNOLOGY ON THE ACOUSTIC PERFORMANCE OF METAMATERIALS
Di Giulio E.;Napolitano M.;Romano R. A.;Dragonetti R.
2023
Abstract
The potential of the manufacturing technologies, such as Selective Laser Melting (SLM) and Digital Light Processing (DLP), has made it feasible today to realize particular structures in a variety of materials and geometrical dimensions, that were unattainable using conventional production methods. Nevertheless, several features of the manufacturing technology assume a fundamental role on the acoustic response of the realized material. In this work, the influence of the manufacturing processes in the realization of acoustic metamaterial with extended surfaces has been investigated. The acoustic behaviour of the metamaterial is analytically described by using the Transfer Matrix Method (TMM), while numerical modelling is performed with a Finite Element software (FEM). Experimental investigations have been carried out on different samples of the designed metamaterial made by 3D-printing and Laser technology on behalf of the Company Z Lab (Cerea, VR). Each sample has been made with different features and surface finish. The experimental results are reported in terms of the sound absorption coefficient at normal incidence and Transmission Loss.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
