English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Customarily, in-plane auxeticity and synclastic bending behavior (i.e.out-of-plane auxeticity) are not independent, being the latter a manifestationof the former. Basically, this is a feature of three-dimensional bodies. Atvariance, two-dimensional bodies have more freedom to deform thanthree-dimensional ones. Here, we exploit this peculiarity and propose atwo-dimensional honeycomb structure with out-of-plane auxetic behavior oppositeto the in-plane one. With a suitable choice of the lattice constitutiveparameters, in its continuum description such a structure can achieve the wholerange of values for the bending Poisson coefficient, while retaining amembranal Poisson coefficient equal to 1. In particular, this structure canreach the extreme values, $-1$ and $+1$, of the bending Poisson coefficient.Analytical calculations are supported by numerical simulations, showing theaccuracy of the continuum formulas in predicting the response of the discretestructure.

A 2D metamaterial with auxetic out-of-plane behavior and non-auxetic in-plane behavior