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Elastic measurements on macroscopic 3D pentamode metamaterials | | Robert Schittny
; Tiemo Bückmann
; Muamer Kadic
; Martin Wegener
; | | Date: |
11 Oct 2013 | | Abstract: | Pentamode metamaterials approximate tailorable artificial liquids. Recently,
microscopic versions of these intricate three-dimensional structures have been
fabricated, but direct experimental characterization has not been possible yet.
Here, using three-dimensional printing, we fabricate macroscopic polymer-based
samples with many different combinations of the small connection diameter d and
the lattice constant a. Direct measurements of the static shear modulus and the
Young’s modulus reveal that both scale approximately according to (d/a)^3, in
good agreement with continuum-mechanics calculations. For the smallest
accessible values of d/a of approx. 1.5%, we find derived ratios of bulk
modulus B to shear modulus G of B/G of approx. 1000. | | Source: | arXiv, 1310.3102 | | Services: | Forum | Review | PDF | Favorites | |
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