Quasistatic dielectric properties of negative poisson’s ratio hexachiral honeycombs

Scarpa, Fabrizio; Lorato, A; Celuch, Małgorzata; Rudnicki, J.; Smith, Christopher W.; Evans, K.

doi:10.1109/aps.2007.4396798

Cited by 3 publications

(1 citation statement)

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“…The peculiar deformation mechanisms of auxetics, and the apparent tunability of their dielectric properties have noted for possible use in microwave absorbers, both using re-entrant honeycombs [9] and chiral configurations [10]. More generally, there is currently a drive towards the design of multifunctional structures and materials, able to be applied to EMC applications and having, at the same time, enhanced structural integrity characteristics.…”

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confidence: 99%

The SILICOMB cellular structure: Mechanical and dielectric properties

Lira

Scarpa

Olszewska

et al. 2009

Physica Status Solidi (b)

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In this work, the mechanical and dielectric properties of a novel centresymmetric honeycomb structure (SILICOMB) are evaluated using finite element (FE) and finite difference time domain (FDTD) models as well as experimental results. The numerical analysis of the in‐plane mechanical properties has been carried out on the full scale and on the representative volume element (RVE) model. The FE model results are compared with the outcome of a series of experimental compressive tests carried out on core structures manufactured using fused deposition modelling (FDM) technique. The comparison with the set of results highlights the specific deformation mechanism of the repetitive cell geometry. Full‐wave FDTD analysis as well as quasi‐electrostatic calculations have been run to investigate in‐plane dielectric properties. Electromagnetic simulations, over a wide frequency band, allow the characterisation of the SILICOMB structure by two effective permittivity functions. Effective permittivity functions are frequency, polarisation and geometry dependent. Multiple geometry parameters to be used to design the honeycomb configurations for multifunctional applications are thus identified and discussed in the paper.

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confidence: 99%