title: Highly anisotropic elements for acoustic pentamode applications.
abstract: Pentamode metamaterials are a class of acoustic metafluids that are characterized by a divergence free modified stress tensor. Such materials have an unconventional anisotropic stiffness and isotropic mass density, which allow themselves to mimic other fluid domains. Here we present a pentamode design formed by an oblique honeycomb lattice and producing customizable anisotropic properties. It is shown that anisotropy in the stiffness can exceed 3 orders of magnitude, and that it can be realistically tailored for transformation acoustic applications.
authors.affiliation: National Research Council, Washington, DC 20001, USA. christopher.layman.ctr@nrl.navy.mil
authors.forename: Christopher N
authors.initials: CN
authors.lastname: Layman
authors.forename: Christina J
authors.initials: CJ
authors.lastname: Naify
authors.forename: Theodore P
authors.initials: TP
authors.lastname: Martin
authors.forename: David C
authors.initials: DC
authors.lastname: Calvo
authors.forename: Gregory J
authors.initials: GJ
authors.lastname: Orris