Bending dominated response of layered mechanical metamaterials alternating pentamode lattices and confinement plates

被引：65

作者：

Amendola, A. ^{[1
]}

Carpentieri, G. ^{[2
]}

Feo, L. ^{[1
]}

Fraternali, F. ^{[1
]}

机构：

[1] Univ Salerno, Dept Civil Engn, Via Giovanni Paolo 2 132, I-84084 Fisciano, SA, Italy

[2] Texas A&M Univ, Dept Aerosp Engn, College Stn, TX 77843 USA

来源：

COMPOSITE STRUCTURES | 2016年 / 157卷

关键词：

Pentamode lattices; Layered systems; Bending dominated regime; Effective elastic moduli; Seismic isolation; Impact protection; FINITE-ELEMENT-ANALYSIS;

D O I：

10.1016/j.compstruct.2016.07.031

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

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. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：71 / 77

页数：7

共 30 条

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