With the advent of additive manufacturing, lattice structures can be printed with precisely controlled geometries. In this way, it is possible to realize porous samples with specific acoustic and thermoacoustic characteristics. However, to this aim and prior to the manufacturing process, it is fundamental to have a design tool that can predict the behaviour of the lattices. In the literature, Luu, Perrot, and Panneton [Acta Acust. United Ac. 103, 1050 (2017)] provide a model to characterize transport parameters of fibrous material with a certain fiber orientation with respect to the direction of wave propagation. In this work, finite element numerical simulations are used to improve their model in order to compute the thermoviscous functions of lattice structures composed of cylindrical struts arranged in Tetragonal Body Centred cells. New correlations for transport parameters are suggested, which are finally coupled with the semi-phenomenological model of Johnson-Champoux-Allard-Lafarge to obtain the complex density and bulk modulus of the equivalent fluid. These results are compared with the measurements carried out on two 3-dimensional-printed samples with hybrid impedance tube techniques.
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June 2021
June 04 2021
Acoustic and thermoacoustic properties of an additive manufactured lattice structurea) Available to Purchase
Special Collection:
Additive Manufacturing and Acoustics
Elio Di Giulio;
Elio Di Giulio
1
Department of Industrial Engineering, University of Naples Federico II
, 80125 Naples, Italy
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Fabio Auriemma;
Fabio Auriemma
2
Department of Mechanical and Industrial Engineering, Tallinn University of Technology— TalTech
, 19086 Tallinn, Estonia
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Marialuisa Napolitano;
Marialuisa Napolitano
1
Department of Industrial Engineering, University of Naples Federico II
, 80125 Naples, Italy
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Raffaele Dragonetti
Raffaele Dragonetti
1
Department of Industrial Engineering, University of Naples Federico II
, 80125 Naples, Italy
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Elio Di Giulio
1
Fabio Auriemma
2
Marialuisa Napolitano
1
Raffaele Dragonetti
1
1
Department of Industrial Engineering, University of Naples Federico II
, 80125 Naples, Italy
2
Department of Mechanical and Industrial Engineering, Tallinn University of Technology— TalTech
, 19086 Tallinn, Estonia
a)
This paper is part of a special issue on Additive Manufacturing and Acoustics.
J. Acoust. Soc. Am. 149, 3878–3888 (2021)
Article history
Received:
February 01 2021
Accepted:
May 07 2021
Citation
Elio Di Giulio, Fabio Auriemma, Marialuisa Napolitano, Raffaele Dragonetti; Acoustic and thermoacoustic properties of an additive manufactured lattice structure. J. Acoust. Soc. Am. 1 June 2021; 149 (6): 3878–3888. https://doi.org/10.1121/10.0005085
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