Materials with negative Poisson?s ratio are called auxetics and they present enhanced properties (e.g. damping, indentation resistance, fracture toughness impact resistance) under external loadings. The auxetic derived from peculiar-shaped microstructures, such as starshaped frames. In the investigation, several applications studied using microstructures. Finite element models developed for dyn...

Abstract 2D lattices are widely popular in micro-architected metamaterial design as they easy to manufacture and provide lightweight multifunctional properties. The mechanical properties of such lattice structures predominantly an intrinsic geometric function the microstructural topology, which generally referred passive metamaterials since there is no possibility alter after manufacturing if a...

Scalar mobility counting rules and their symmetry extensions are reviewed for finite frameworks and also for infinite periodic frameworks of the bar-and-joint, body-joint and body-bar types. A recently published symmetry criterion for the existence of equiauxetic character of an infinite framework is applied to two long known but apparently little studied hinged-hexagon frameworks, and is shown...