Experimental response of additively manufactured metallic pentamode materials confined between stiffening plates

被引：100

作者：

Amendola, A. ^{[1
]}

Smith, C. J. ^{[2
]}

Goodall, R. ^{[2
]}

Auricchio, F. ^{[3
]}

Feo, L. ^{[1
]}

Benzoni, G. ^{[4
]}

Fraternali, F. ^{[1
]}

机构：

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

[2] Univ Sheffield, Dept Mat Sci & Engn, Mappin St, Sheffield S1 3JD, S Yorkshire, England

[3] Univ Pavia, Dept Civil Engn & Architecture, Via Ferrata 3, I-27100 Pavia, Italy

[4] Univ Calif San Diego, Dept Struct Engn, La Jolla, CA 92093 USA

来源：

COMPOSITE STRUCTURES | 2016年 / 142卷

关键词：

Pentamode lattices; Additive manufacturing; Effective elastic moduli; Inelastic response; FINITE-ELEMENT-ANALYSIS;

D O I：

10.1016/j.compstruct.2016.01.091

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

An experimental investigation on the mechanical response of confined pentamode lattices in the elastic and post-yield regimes is presented. An Electron Beam Melting facility is employed to additively manufacture pentamode lattices confined by terminal plates in a titanium alloy. The given experimental results show that the geometry of the microstructure, and the macroscopic aspect ratio of the confined lattices strongly influence the lateral and vertical stiffness properties of the structure. The post-elastic response of the analyzed materials features acceptable energy dissipation capacity. The presented results highlight several analogies between the mechanical response of confined pentamode lattices and that of elastomeric bearings. formed by soft rubber pads and stiffening steel or fiber-reinforced composite layers. They pave the way to future studies on the use of pentamode materials for the fabrication of innovative seismic isolation devices and/or shear-wave band gap systems. (c) 2016 Elsevier Ltd. All rights reserved.

引用

页码：254 / 262

页数：9

共 26 条

[1] On the additive manufacturing, post-tensioning and testing of bi-material tensegrity structures [J].