000015269 001__ 15269
000015269 005__ 20161115100216.0
000015269 04107 $$aeng
000015269 046__ $$k2016-08-21
000015269 100__ $$aWang, Lifeng
000015269 24500 $$aHarnessing structural hierarchy to design lightweight phononic crystals

000015269 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000015269 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000015269 506__ $$arestricted
000015269 520__ $$2eng$$aWe numerically investigate the elastic wave propagation in hierarchical honeycombs that are constructed by replacing the cell walls of regular honeycombs with hexagonal, kagome, and triangular substructures, respectively. We show that the hierarchically architected honeycombs can exhibit broad and multiple phononic band gaps, which result from the multiple scatterings in the hierarchical architectures. Our analysis reveals that the existence of these prominent wave attenuation features strongly depend on two geometric parameters, hierarchical length ratio and number of substructures away from the central axis. Furthermore, the introduction of structural hierarchy also endows the hierarchical honeycombs with enhanced stiffness. We predict that the proposed hierarchical honeycombs can realize unique combinations of the prominent wave attenuation capability and enhanced specific stiffness, thereby providing opportunities to design lightweight phononic crystals.

000015269 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000015269 653__ $$a

000015269 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000015269 720__ $$aWang, Lifeng
000015269 8560_ $$ffischerc@itam.cas.cz
000015269 8564_ $$s156919$$uhttps://invenio.itam.cas.cz/record/15269/files/TS.SM07-3.05.pdf$$yOriginal version of the author's contribution as presented on CD,  page 2222, code TS.SM07-3.05
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000015269 962__ $$r13812
000015269 980__ $$aPAPER