The concept of metamaterials originates from the proposal of left-hand materials with
negative refractive index, followed by which, varieties of metamaterials with kinds of fantastic …

Auxetic materials and structures have attracted increasing attention because of their
extraordinary mechanical properties. Various types of auxetic tubular structures have been …

Mechanical metamaterials exhibit properties and functionalities that cannot be realized in
conventional materials. Originally, the field focused on achieving unusual (zero or negative) …

Materials and structures with negative Poisson's ratio exhibit a counter-intuitive behaviour.
Under uniaxial compression (tension), these materials and structures contract (expand) …

The surge of interest in so-called “designer materials” during the last few years together with
recent advances in additive manufacturing (3D printing) techniques that enable fabrication …

Mechanical metamaterials can be defined as a class of architected materials that exhibit
unprecedented mechanical properties derived from designed artificial architectures rather …

Recent advances in lithography technology and the spread of 3D printers allow us a facile
fabrication of special materials with complicated microstructures. The materials are called …

Poisson's ratio had long been considered to be an intrinsic material property, confined within
a narrow domain and governed solely by the geometry of interatomic bonds. Materials with …

The Poisson's ratio is a fundamental mechanical property that relates the resulting lateral
strain to applied axial strain. Although this value can theoretically be negative, it is positive …

Materials with negative Poisson's ratio attract considerable attention due to their underlying
intriguing physical properties and numerous promising applications, particularly in stringent …