Negative Poisson's ratio in periodic porous graphene structures

被引：51

作者：

Viet Hung Ho ^{[1
]}

Duc Tam Ho ^{[1
]}

Kwon, Soon-Yong ^{[2
]}

Kim, Sung Youb ^{[1
]}

机构：

[1] Ulsan Natl Inst Sci & Technol, Dept Mech Engn, Ulsan 44919, South Korea

[2] Ulsan Natl Inst Sci & Technol, Sch Mat Sci & Engn, Ulsan 44919, South Korea

来源：

PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2016年 / 253卷 / 07期

基金：

新加坡国家研究基金会;

关键词：

atomistic simulations; graphene; negative Poisson's ratio; periodic structures; porous structures; CUBIC MATERIALS; SHEETS; STRENGTH; DESIGN; AUXETICITY; CRYSTALS; FOAM;

D O I：

10.1002/pssb.201600061

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We conducted molecular statics simulations to investigate the negative Poisson's ratio (auxetic behavior) of periodic porous graphene structures based on the rotating rigid unit mechanism. To obtain a negative Poisson's ratio, simple voids were periodically introduced into graphene. We showed that the Poisson's ratio of the designed graphene structure is strongly dependent on the aspect ratio of the voids, and it can approach the theoretical limit of -1.0. More importantly, the graphene periodic structure maintains its auxetic behavior even under large strains (epsilon similar to 0.20). Hence, it can be employed in a wide range of applications requiring structures that can endure large deformation. In addition, we found that the key factor in the auxeticity of the investigated structures is the deformation occurring at the void tips. (C) 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：1303 / 1309

页数：7

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