The Impact of Additive Manufacturing on the Acoustic Performance of Novel Porous Materials
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Conference PaperDate:
2022Access:
openAccessCitation:
Agnieszka Ciochon, John Kennedy, Raphael Leiba, Lara Flanagan, The Impact of Additive Manufacturing on the Acoustic Performance of Novel Porous Materials, 28th AIAA/CEAS Aeroacoustics Conference, Southampton, UK, 14 June - 17 June 20, 2022Download Item:
Abstract:
Commonly used conventional acoustic porous materials suffer from a limited operational
frequency range and great dependency of the sample thickness on their performance. For this
reason, acoustic metamaterials have caught the eye of the scientific community with their ability
to manipulate and absorb soundwaves despite their subwavelength dimensions. These novel
acoustic materials are especially of interest for aerospace and automotive industries. Industrially
relevant design tools are required to unlock the potential of these materials and the development
of these tools requires benchmark problems. This work analyzes how the additive manufacturing
process influences the acoustic performance of a periodic porous acoustic material. To answer
this question, samples of a benchmark material were fabricated using selective laser melting
with a 0.03 mm layer height. An optical microscope, a confocal microscope and computerized
tomography scanner were used to examine manufactured specimens and provide insight into
their surface topology. Numerical models of the structure were created. The computational
results were compared with the experimental values. A combination of modelling strategies
are investigated to incorporate features of the additive manufacture in the prediction of the
acoustic behaviour. The observed mismatch between them can only partially be explained by
the presence of the surface roughness. This study emphasizes the need to take into account
more aspects of the additive manufacturing process when designing acoustic materials.
Sponsor
Grant Number
Irish Research Council (IRC)
GOIPG/2019/2927
Author's Homepage:
http://people.tcd.ie/aciochonhttp://people.tcd.ie/jkenned5
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PUBLISHEDI would like to upload the accepted version to TARA. According to the guideline: 'The above link and final published PDF are only for your personal use and is only accessible when logged in to your AIAA account. If you wish to post your article on your personal website or institutional repository, you may use the accepted version which is the version you submitted for acceptance. It is not the downloaded version from ARC. If you wish to share your published work with others, the link below provides free access for up to four users (shared among all authors) to your publication. You may send this link to colleagues that may be interested. If your paper is not published under an open access model, this free access link may NOT be used for commercial purposes or posted on openly accessible websites. Once four users activate access to your publication, there will be no more activation tokens available. Please send the following to share with others'. The published version is available here: https://arc.aiaa.org/doi/10.2514/6.2022-2903
Southampton, UK
Author: Ciochon, Agnieszka Helena; Kennedy, John
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28th AIAA/CEAS Aeroacoustics ConferenceType of material:
Conference PaperAvailability:
Full text availableKeywords:
additive manufacturing, acoustic materials, surface roughness, SLMSubject (TCD):
Smart & Sustainable Planet , Additive Manufacturing , SLM , SURFACE ROUGHNESS , acoustic materialsDOI:
https://doi.org/10.2514/6.2022-2903Metadata
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