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Double defects-induced elastic wave coupling and energy localization in a phononic crystal

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dc.contributor.authorJo, Soo-Ho-
dc.contributor.authorShin, Yong Chang-
dc.contributor.authorChoi, Wonjae-
dc.contributor.authorYoon, Heonjun-
dc.contributor.authorYoun, Byeng D-
dc.contributor.authorKim, Miso-
dc.date.accessioned2021-11-01T02:36:04Z-
dc.date.available2021-11-01T11:37:02Z-
dc.date.issued2021-09-16-
dc.identifier.citationNano Convergence. 2021 Sep 16;8(1):27ko_KR
dc.identifier.issn2196-5404-
dc.identifier.urihttps://doi.org/10.1186/s40580-021-00277-4-
dc.identifier.urihttps://hdl.handle.net/10371/174994-
dc.description.abstractThis study aims to investigate elastic wave localization that leverages defect band splitting in a phononic crystal with double defects through in-depth analysis of comparison of numerical and experimental results. When more than one defect is created inside a phononic crystal, these defects can interact with each other, resulting in a distinctive physical phenomenon from a single defect case: defect band splitting. For a phononic crystal consisting of circular-hole type unit cells in a thin aluminum plate, under A0 (the lowest antisymmetric) Lamb waves, both numerical simulations and experiments successfully confirm the defect band splitting phenomenon via frequency response functions for the out-of-plane displacement calculated/measured at the double defects within a finite distance. Furthermore, experimental visualization of in-phase and out-of-phase defect mode shapes at each frequency of the split defect bands is achieved and found to be in excellent agreement with the simulated results. Different inter-distance combinations of the double defects reveal that the degree of the defect band splitting decreases with  the increasing distance due to weaker coupling between the defects. This work may shed light on engineering applications of a multiple-defect-introduced phononic crystal, including broadband energy harvesting, frequency detectors, and elastic wireless power transfer.ko_KR
dc.description.sponsorshipThis research was supported by the National Research Council of Science and Technology (NST) grant by the Korea Government (MSIP) (No. CAP-17-04KRISS) and by the Creative Materials Discovery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (Grant No. 2018M3D1A1058794).ko_KR
dc.language.isoenko_KR
dc.publisherSpringer Openko_KR
dc.subjectPhononic crystal-
dc.subjectEnergy localization-
dc.subjectDefect band splitting-
dc.subjectDouble defect modes-
dc.titleDouble defects-induced elastic wave coupling and energy localization in a phononic crystalko_KR
dc.typeArticleko_KR
dc.contributor.AlternativeAuthor조수호-
dc.contributor.AlternativeAuthor신용창-
dc.contributor.AlternativeAuthor최원재-
dc.contributor.AlternativeAuthor윤헌준-
dc.contributor.AlternativeAuthor김미소-
dc.citation.journaltitleNano Convergenceko_KR
dc.language.rfc3066en-
dc.rights.holderThe Author(s)-
dc.date.updated2021-09-19T03:10:28Z-
dc.citation.number1ko_KR
dc.citation.startpage27ko_KR
dc.citation.volume8ko_KR
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Mechanical Aerospace Engineering (기계항공공학부)Journal Papers (저널논문_기계항공공학부)
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