Negative Poisson’s ratio (NPR) materials have broad applications such as heat dissipation, vibration damping, and energy absorption because of their designability, lightweight quality, high strength ratio. Here, we use first-principles calculations to find a two-dimensional (2D) auxetic material (space group R3¯m), which exhibits maximum in-plane NPR −0.0846 relatively low Young’s modulus in th...

The present manuscript approaches the mechanical interpretation about volume changes of auxetic metamaterials within a multiscale perspective. kinematic fields resulting from tests were assessed via digital image correlation (DIC). characterization is grounded sound homogenization principles based on representative elements (RVE) at large deformations. main achieved results concern in highlight...

A IO N When materials are uniaxially compressed, they typically expand in directions orthogonal to the applied load. Here, we exploit buckling to design a new class of three dimensional metamaterials with negative Poisson's ratio that contract in the transverse direction under compressive loading regimes. These proposed metamaterials consist of an array of patterned elastomeric spherical shells...

Simulations of a flexible coarse-grained model are used to study silica aerogels. This model, introduced in a previous study (J. Phys. Chem. C 2007, 111, 15792), consists of spherical particles which interact through weak nonbonded forces and strong interparticle bonds that may form and break during the simulations. Small-deformation simulations are used to determine the elastic moduli of a wid...

Auxetic materials or with a negative Poisson's ratio have great potential to be used in many industries because of their specific mechanical properties such as high stiffness and strength significant weight saving. In this article, the effect various parameters fabrication process on microstructure polyurethane auxetic foam was investigated. Moreover, compression behavior different situations, ...