Mechanical metamaterials, also known as architected materials, are rationally designed
composites, aiming at elastic behaviors and effective mechanical properties beyond ('meta') …

The invisible cloak has attracted great attention due to its significant influences on science
and engineering. Active elastic wave metamaterials provide superior controllable …

In this paper, a new composite metamaterial structure with negative effective mass density,
negative effective modulus, and an ultralarge Poisson's ratio is designed for vibration …

Surface wave manipulation in periodic trench barriers based on real band structures has its
inherent limitations. This work revisits this problem from the perspective of complex band …

Steering flexural waves in thin plates benefits several applications, including vibration
energy harvesting and micro-electro-mechanical systems (MEMS). This study proposes a …

Hierarchical structures with constituents over multiple length scales are found in various
natural materials like bones, shells, spider silk and others, all of which display enhanced …

Pentamode materials, made of conventional solids through microstructure de-sign, may
have acoustic property of complex fluid. Its superior capacity for underwater acoustic wave …

Pentamode metamaterials (PMMs) are a new class of three-dimensional (3D) mechanical
metamaterials, engineered to have unusual elastic property of vanishing shear modulus …

Based on rigorous theoretical findings, we present a proof-of-concept design for a structured
square cloak enclosing a void in an elastic lattice. We implement high-precision fabrication …

We report a novel approach to control flexural waves in thin plates using metasurfaces
constituted of an array of parallel arranged composite beams with their neutral planes the …