The techniques that permit the materialization of organic and curved geometries include those based on curving flat materials using cut patterns, which have been explored with improvement digital manufacturing tools. This study has analyzed kerfing, lamina emergent mechanisms, auxetic linkages kirigami, seeking greater knowledge differentiation between these techniques. mechanical principles, o...

3D auxetic structures, which present negative Poisson’s ratio in the uniaxial compression deformation, is an ideal artificial material for meta-implants because of its lightweight, good property and suitable porosity bone recovery compared with conventional meta-biomaterials. Selective laser melting (SLM) commonly used to produce metallic structures but limited by temperature reflect rate mater...

Mechanical metamaterials are artificial structures with structure-dependent properties. They often harness zero-energy deformation modes, e.g., a single shape change that limits their applications, resulting in the need for changeable mechanical responses. We address this limitation by using flexible material, called light-responsive shape-memory polydimethylsiloxane (SM-PDMS), to introduce rep...

Auxetic materials (negative Poisson’s ratio) are of exceptional importance for nanomechanical applications. Using first-principles calculations, we propose two-dimensional δ-phase carbon monochalco...

Abstract Auxetic (negative Poisson’s ratio) and gradient open cell foams have shown promise for their conformability high impact energy absorption—useful in applications like protective equipment, footwear prosthetics. Recent methods fabricated auxetic closed foam by steaming conventional foam. Methods developed herein control the structure of foam, to produce novel intentionally anisotropic Pi...

This work describes the low-velocity impact behavior of composite sandwich panels with different types auxetic (negative Poisson’s ratio) and non-auxetic prismatic core structures. Sandwich have been manufactured carbon/fiber epoxy face sheets, polyurethane rigid foam or 3D printed PLA plastic cellular honeycombs head (hexagonal, re-entrant, hexachiral arrowhead). The material properties consti...

Abstract In recent years, the investigation of auxetic materials is receiving more and attention due to their wide range applications which follow enhancing indentation resistance, toughness, shear other advantages such materials. This work reports results studies models metamaterials with nanoinclusions. Yukawa crystals nanoinclusions in form nanochannels (NCs) [001] crystallographic direction...

Auxetic honeycomb has unique mechanical properties such as good energy absorption capacity, tensile strength and fracture toughness, etc. Therefore, with a negative Poisson’s ratio is used widely in medical, biological, aerospace other fields. This large deformations vibration reduction. It very important to study the nonlinear constitutive of structure. this paper establishes relationship auxe...

Modern fabrication techniques, such as additive manufacturing, can be used to create materials with complex custom internal structures. These engineered materials exhibit a much broader range of bulk properties than their base materials and are typically referred to as metamaterials or microstructures. Although metamaterials with extraordinary properties have many applications, designing them i...

Auxetic materials with a negative Poison’s ratio (PR) have the potential to meet demand for different materials, especially technical textiles. In literature, Universal Tensile Test (UTT) devices and various experimental setups developed by researchers been used in PR measurements. This study aims investigate of knitted fabrics UTT extensometer comparatively using same measurement parameters ac...