Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Pentamode metamaterials with independently tailored bulk modulus and mass density

 
: Kadic, M.; Bückmann, T.; Schittny, R.; Gumbsch, P.; Wegener, M.

:
Volltext (PDF; )

Physical review applied 2 (2014), Nr.5, Art.054007, 7 S.
ISSN: 2331-7019
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IWM ()
tailored bulk modulus; metamaterials; elasticity

Abstract
We propose a class of linear elastic three-dimensional metamaterials for which the effective parameters bulk modulus and mass density can be adjusted independently over a large range—which is not possible for ordinary materials. First, we systematically evaluate the static mechanical properties and the phonon dispersion relations. We show that the two are quantitatively consistent in the long-wavelength limit. To demonstrate the feasibility, corresponding fabricated polymer microstructures are presented. Finally, we discuss calculations for laminates composed of alternating layers of two different metamaterials with equal bulk modulus yet different mass density. This lamination leads to metamaterials with effectively anisotropic uniaxial dynamic mass density tensors.

: http://publica.fraunhofer.de/dokumente/N-354509.html