Abstract We describe here the quasi-static crushing behavior of novel classes multiphase (hybrid) hierarchical lattice metamaterials. The first class is represented by a hybrid architecture combining honeycomb with polyurethane foam filler, while second structure produced injecting an alginate hydrogel into voids metamaterial. Twelve different auxetic (i.e. negative Poisson’s ratio) and non-aux...

In this work, we propose a new auxetic (negative Poisson's ratio values) structure, based on $\gamma$-graphyne here named $A\gamma G$ $structure$. Graphynes are 2D carbon allotropes with phenylic rings connected by acetylenic groups. The A$\gamma$G structural/mechanical and electronic properties, as well its thermal stability, were investigated using classical reactive quantum molecular dynamic...

Abstract Auxetic metamaterials exhibit an unexpected behaviour of a negative Poisson’s ratio (NPR), meaning they expand transversely when stretched longitudinally. This is generated predominantly due to the way individual elements auxetic lattice are structured. These structures gaining interest in wide variety applications such as energy absorption, sensors, smart filters, vibration isolation ...

Abstract Mechanical metamaterials possess unusual mechanical properties that cannot be found in nature. Auxetic have negative Poisson's ratios and tend to expand a direction perpendicular the axial extension direction. When ratio of display circuit board is forced −1 by adopting an auxetic metamaterial, can stretchable without image distortion, this called meta‐display study. The critical obsta...

Abstract Parts with an auxetic structure, which exhibit negative Poisson’s ratio, can be associated a novel class of smart materials. Such interesting property has been widely explored, over the time, for different applications, i.e., medical, automotive, robotic and aeronautic field. However, research about design analysis behavior is still on way. In this paper, 2D re-entrant honeycomb struct...

The research field of auxetics, materials or structures exhibiting a negative Poisson's ratio, has received attention because the unusually advantageous material properties that can be achieved with it, such as high indentation resistance and shear resistance. In past decades, theoretical understanding different factors lead to an auxetic behaviour advanced greatly, resulting in rapid increase ...

In this study, the deformation and energy absorption characteristics of a novel hybrid tube is investigated both experimentally numerically. The architecture proposed composed an inner conventional co-axially arranged outer auxetic tube. Quasi-static compressive tests were conducted on tubes, tubes tubes. A three-dimensional digital image correlation technique was used to monitor evolution radi...