微纳米点阵力学超材料的设计和性能

在过去几年中,增材制造技术的不断涌现促进了点阵力学超材料研究的迅猛发展。本文主要介绍三维微纳米点阵力学超材料的性能和设计,强调点阵单胞基本单元的演化发展:从桁架到平板再到曲面,如何降低结构内部的应力集中,一步步实现理论预测的各向同性的Hashin–Shtrikman极限刚度。并对这一类力学超材料在生物医药、能源环境等领域的应用进行概述。

DESIGN AND MECHANICAL PROPERTY OF MICRO-/NANO-SCALE ARCHITECTED METAMATERIALS

In the past years, the prosperous progress of additive manufacturing, promotes a rapid development of the mechanical architected metamaterials. In this paper, the design and the excellent mechanical properties of these metamaterials are introduced, including the following parts: the evolutional development of the unit cell design from beam-based, plated-based to shell-based structures in order to reduce the intrinsic stress concentration;the route to achieve the isotropic Hashin-Shtrikman stiffness limit;their applications in variousfields of biological medicine, energy, environment, and others.