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RESEARCH PRODUCT

Poroelastic metamaterials with negative effective static compressibility

Jingyuan QuMuamer KadicMuamer KadicMartin Wegener

subject

FabricationMaterials sciencePhysics and Astronomy (miscellaneous)Hydrostatic pressurePoromechanicsIsotropyMetamaterial02 engineering and technologyMechanics021001 nanoscience & nanotechnology01 natural sciences0103 physical sciencesPressure increaseCompressibility010306 general physics0210 nano-technologyBar (unit)

description

We suggest a three-dimensional metamaterial structure exhibiting an isotropic expansion in response to an increased hydrostatic pressure imposed by a surrounding gas or liquid. We show that this behavior corresponds to a negative absolute (rather than only differential) effective compressibility under truly static and stable conditions. The poroelastic metamaterial is composed of only a single ordinary constituent solid. By detailed numerical parameter studies, we find that a pressure increase of merely one bar can lead to a relative increase in the effective volume exceeding one percent for geometrical structure parameters that should be accessible to fabrication by 3D printing.

https://doi.org/10.1063/1.4981783