Haitao Liao

TL;DR: In this paper, a review of 2D and 3D chiral mechanical metamaterials is presented, and their mechanical behaviors and deformation mechanisms can be investigated through equilibrium principle, strain energy analysis, micropolar elasticity and homogenization theories.

TL;DR: In this paper, the authors review the latest advances in the design and fabrication of multifunctional structures based on metamaterials, covering three main aspects, i.e., the direct design of mechanical metAMaterials and their multifunctionsal structures, the intelligent multifunctionAL structures with shape-shifting capabilities, the metammaterials-based design to achieve both the load bearing capability and other specific functions.

TL;DR: The proposed 3D chiral metamaterials represents a series of metammaterials with robust microstructures design feasibilities and competitions between different types of deformation mechanisms are discussed.

TL;DR: In this paper, five sets of chiral lattice composite structures with tailorable thermal expansion (CTE) are proposed, where synergic effects of rigid node rotation and bi-material ligament bending deformation are responsible for a giant range of structural deformation due to temperature change, from positive CTE to negative CTE through adjusting the geometrical parameters of composite Bi-material unit cell, and the relationship between unit cell geometric parameters and CTEs of the structure are studied systematically through finite element analysis.

TL;DR: In this paper, a dual scale hybrid mechanical metamaterial consisting of simple cubic structure, body-centered cubic structure (BCC), face centered cubic structure unit cells at different scale levels were designed and proposed for impact energy absorption, where one large type A unit cell and eight (2 × 2 × 2) small periodicspatially architected type B unit cells with half size of type A cell along X, Y and Z directions were integrated together for harvesting final hybrid metammaterials.