论文标题
分层机械超材料的弯曲主导响应交替交替
Bending dominated response of layered mechanical metamaterials alternating pentamode lattices and confinement plates
论文作者
论文摘要
提出了一项关于由五角星晶格和僵硬板形成的单层和多层系统弹性响应的数值研究。进行有限元模拟以分析此类结构的有效弹性模量对合适的纵横比的依赖性，这表征了微观和宏观尺度上通用五角星层的几何形状，以及分层结构的层压方案。给定的数值结果凸显了所检查的结构表现出弯曲主导的响应，并能够实现有效的剪切模量的低值，并且在当代上，有效压缩模量的高值。我们得出的结论是，被关闭的五角星晶格可以被视为新型的超材料，非常适合地震隔离和影响保护目的。可以通过使用几种几何和机械设计变量来对其弹性响应进行细微的调整。
A numerical study on the elastic response of single- and multi-layer systems formed by alternating pentamode lattices and stiffening plates is presented. Finite element simulations are conducted to analyze the dependence of the effective elastic moduli of such structures upon suitable aspect ratios, which characterize the geometry of the generic pentamode layer at the micro- and macro-scale, and the lamination scheme of the layered structure. The given numerical results highlight that the examined structures exhibit bending-dominated response, and are able to achieve low values of the effective shear modulus and, contemporarily, high values of the effective compression modulus. We are lead to conclude that confined pentamode lattices can be regarded as novel metamaterials that are well suited for seismic isolation and impact protection purposes. Their elastic response can be finely tuned by playing with several geometrical and mechanical design variables.
