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dc.contributor.authorJohnston, William
dc.contributor.authorKankanamalage, Pulitha G.
dc.contributor.authorSharma, Bhisham N.
dc.identifier.citationJohnston, W., Kankanamalage, P. G., & Sharma, B. (2021). 3D printed multifunctional low-frequency sound absorbers. Paper presented at the Proceedings of INTER-NOISE 2021 - 2021 International Congress and Exposition of Noise Control Engineering, doi:10.3397/IN-2021-3177en_US
dc.descriptionClick on the DOI link to access this conference paper (may not be free).en_US
dc.description.abstractCellular porous materials are an attractive choice for lightweight structural design. However, though their open porous architecture is ideally suited for multifunctional applications, their use is typically limited by the pore sizes achievable by traditional as well as advanced fabrication processes. Here, we present an alternative route towards overcoming this pore size limitation by leveraging our recent success in printing fibrous structures. This is achieved by superimposing a fibrous network on a load-bearing, open-celled porous architecture. The multifunctional structure is 3D printed using a novel technique that enables us to simultaneously print a load-bearing scaffold and the necessary fibrous network. The acoustic properties of the printed structures are tested using a normal-incidence impedance tube method. Our results show that such structures can provide very high absorption at low frequencies while retaining the mechanical performance of the underlying architected structure.en_US
dc.description.sponsorshipThis work was supported by a NASA EPSCoR Cooperative Agreement Notice (Grant Number: 80NSSC19M0153). William Johnston would also like to acknowledge the Undergraduate Research and Creative Activities Award provided by Wichita State University and the Robert W. Young award for Undergraduate Student Research in Acoustics by the Acoustical Society of America.en_US
dc.publisherInstitute of Noise Control Engineeringen_US
dc.relation.ispartofseriesINTER-NOISE and NOISE-CON Congress and Conference Proceedings, InterNoise21;
dc.subject3D printersen_US
dc.subjectAcoustic impedanceen_US
dc.subjectAcoustic wave absorptionen_US
dc.subjectNetwork architectureen_US
dc.subjectPorous materialsen_US
dc.subjectStructural designen_US
dc.title3D printed multifunctional low-frequency sound absorbersen_US
dc.typeConference paperen_US
dc.rights.holder© INTER-NOISE 2021 .All right reserved.en_US

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    Research publications authored by the Department of Aerospace Engineering faculty and graduate students.

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