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Issue 30, 2018
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Auxetic multiphase soft composite material design through instabilities with application for acoustic metamaterials

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Abstract

We investigate the instability-induced pattern transformations in 3D-printed soft composites consisting of stiff inclusions and voids periodically distributed in a soft matrix. These soft auxetic composites are prone to elastic instabilities giving rise to negative Poisson's ratio (NPR) behavior. Upon reaching the instability point, the composite microstructure rearranges into a new morphology attaining an NPR regime. Remarkably, identical composites can morph into distinct patterns depending on the loading direction. These fully determined instability-induced distinct patterns are characterized by significantly different NPR behaviors, thus, giving rise to enhanced tunability of the composite properties. Finally, we illustrate a potential application of these reversible pattern transformations as tunable acoustic-elastic metamaterials capable of selectively filtering low frequency ranges controlled by deformation.

Graphical abstract: Auxetic multiphase soft composite material design through instabilities with application for acoustic metamaterials

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Publication details

The article was received on 28 Apr 2018, accepted on 10 Jul 2018 and first published on 11 Jul 2018


Article type: Communication
DOI: 10.1039/C8SM00874D
Citation: Soft Matter, 2018,14, 6171-6180
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    Auxetic multiphase soft composite material design through instabilities with application for acoustic metamaterials

    J. Li, V. Slesarenko and S. Rudykh, Soft Matter, 2018, 14, 6171
    DOI: 10.1039/C8SM00874D

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