Effective properties of layered auxetic hybrids

Research output: Contribution to journalArticle

Abstract

In this paper, we study the effective thermo-elastic properties of hybrid materials containing layered auxetic microstructures. We consider three types of arrangements: (1) hybrids with randomly distributed plate-like inclusions possessing the negative Poisson's ratio and negative thermal expansion coefficient, (2) sandwich structures with auxetic cores and (3) laminates with randomly arranged and ordered auxetic and negative thermal expansion layers. We evaluate the effective characteristics of these hybrids by analysing representative volume elements using the finite element method. We observe that the plate-like auxetic inclusions increase the effective stiffness of the hybrid. This stiffening effect was previously reported for spherical and cubic auxetic inclusions and is further investigated in this study. We demonstrate that the aspect ratio of the plate-like shapes has strong influence on this stiffening effect: the decrease in the aspect ratio reduces stiffening in the direction parallel to the layers and enhances it in the direction perpendicular to them. In the auxetic laminates, the stiffening effect strengths with the increase in the number of auxetic layers. We also show that thinner inclusions provide lower effective linear coefficient of thermal expansion (CTE) in the direction parallel to the layering and higher effective CTE in the direction perpendicular to it.

Original languageEnglish
Pages (from-to)391-400
Number of pages10
JournalComposite Structures
Volume209
DOIs
Publication statusPublished - 1 Feb 2019

Fingerprint

Laminates
Thermal expansion
Aspect ratio
Sandwich structures
Hybrid materials
Poisson ratio
Stiffness
Finite element method
Microstructure
Direction compound
Negative thermal expansion

Cite this

@article{d4eba183b9994ba8828dc533bb77bd57,
title = "Effective properties of layered auxetic hybrids",
abstract = "In this paper, we study the effective thermo-elastic properties of hybrid materials containing layered auxetic microstructures. We consider three types of arrangements: (1) hybrids with randomly distributed plate-like inclusions possessing the negative Poisson's ratio and negative thermal expansion coefficient, (2) sandwich structures with auxetic cores and (3) laminates with randomly arranged and ordered auxetic and negative thermal expansion layers. We evaluate the effective characteristics of these hybrids by analysing representative volume elements using the finite element method. We observe that the plate-like auxetic inclusions increase the effective stiffness of the hybrid. This stiffening effect was previously reported for spherical and cubic auxetic inclusions and is further investigated in this study. We demonstrate that the aspect ratio of the plate-like shapes has strong influence on this stiffening effect: the decrease in the aspect ratio reduces stiffening in the direction parallel to the layers and enhances it in the direction perpendicular to them. In the auxetic laminates, the stiffening effect strengths with the increase in the number of auxetic layers. We also show that thinner inclusions provide lower effective linear coefficient of thermal expansion (CTE) in the direction parallel to the layering and higher effective CTE in the direction perpendicular to it.",
keywords = "Auxetic inclusions, Coefficient of thermal expansion, Effective characteristics",
author = "Igor Shufrin and Elena Pasternak and Dyskin, {Arcady V.}",
year = "2019",
month = "2",
day = "1",
doi = "10.1016/j.compstruct.2018.10.072",
language = "English",
volume = "209",
pages = "391--400",
journal = "Composite Structures",
issn = "0263-8223",
publisher = "Elsevier",

}

Effective properties of layered auxetic hybrids. / Shufrin, Igor; Pasternak, Elena; Dyskin, Arcady V.

In: Composite Structures, Vol. 209, 01.02.2019, p. 391-400.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effective properties of layered auxetic hybrids

AU - Shufrin, Igor

AU - Pasternak, Elena

AU - Dyskin, Arcady V.

PY - 2019/2/1

Y1 - 2019/2/1

N2 - In this paper, we study the effective thermo-elastic properties of hybrid materials containing layered auxetic microstructures. We consider three types of arrangements: (1) hybrids with randomly distributed plate-like inclusions possessing the negative Poisson's ratio and negative thermal expansion coefficient, (2) sandwich structures with auxetic cores and (3) laminates with randomly arranged and ordered auxetic and negative thermal expansion layers. We evaluate the effective characteristics of these hybrids by analysing representative volume elements using the finite element method. We observe that the plate-like auxetic inclusions increase the effective stiffness of the hybrid. This stiffening effect was previously reported for spherical and cubic auxetic inclusions and is further investigated in this study. We demonstrate that the aspect ratio of the plate-like shapes has strong influence on this stiffening effect: the decrease in the aspect ratio reduces stiffening in the direction parallel to the layers and enhances it in the direction perpendicular to them. In the auxetic laminates, the stiffening effect strengths with the increase in the number of auxetic layers. We also show that thinner inclusions provide lower effective linear coefficient of thermal expansion (CTE) in the direction parallel to the layering and higher effective CTE in the direction perpendicular to it.

AB - In this paper, we study the effective thermo-elastic properties of hybrid materials containing layered auxetic microstructures. We consider three types of arrangements: (1) hybrids with randomly distributed plate-like inclusions possessing the negative Poisson's ratio and negative thermal expansion coefficient, (2) sandwich structures with auxetic cores and (3) laminates with randomly arranged and ordered auxetic and negative thermal expansion layers. We evaluate the effective characteristics of these hybrids by analysing representative volume elements using the finite element method. We observe that the plate-like auxetic inclusions increase the effective stiffness of the hybrid. This stiffening effect was previously reported for spherical and cubic auxetic inclusions and is further investigated in this study. We demonstrate that the aspect ratio of the plate-like shapes has strong influence on this stiffening effect: the decrease in the aspect ratio reduces stiffening in the direction parallel to the layers and enhances it in the direction perpendicular to them. In the auxetic laminates, the stiffening effect strengths with the increase in the number of auxetic layers. We also show that thinner inclusions provide lower effective linear coefficient of thermal expansion (CTE) in the direction parallel to the layering and higher effective CTE in the direction perpendicular to it.

KW - Auxetic inclusions

KW - Coefficient of thermal expansion

KW - Effective characteristics

UR - http://www.scopus.com/inward/record.url?scp=85055906763&partnerID=8YFLogxK

U2 - 10.1016/j.compstruct.2018.10.072

DO - 10.1016/j.compstruct.2018.10.072

M3 - Article

VL - 209

SP - 391

EP - 400

JO - Composite Structures

JF - Composite Structures

SN - 0263-8223

ER -