Stochastic analysis of the interphase effects on the mechanical properties of clay/epoxy nanocomposites

Ashkan Almasi, Mohammad Silani, Hossein Talebi, Timon Rabczuk

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The polymeric clay nanocomposites are a new class of materials which recently have become the center of attention because of their superior mechanical and physical properties. Several studies have been performed on the mechanical characterization of these nanocomposites; however most of those studies have neglected the effect of the interphase and interfacial region between the clays and the matrix despite of its significance on the mechanical performance of the nanocomposites. Based on a hierarchical multiscale approach on the mesoscopic level, in this study we use the stochastic analysis and the computational homogenization method to analyse the effect of thickness and stiffness of the interphase region on the overall elastic properties of the clay/epoxy nanocomposites. The results show that considering interphase layer reduces the stiffness of clay/epoxy nanocomposites and this decrease becomes significant in higher clay contents. Then, the significance of the stiffness and thickness of the interphase layer on the elastic modulus of clay/epoxy nanocomposites are studied using a sensitivity analysis. Finally, the results of this study are validated with available experimental results.

Original languageEnglish
Pages (from-to)1302-1312
Number of pages11
JournalComposite Structures
Volume133
DOIs
Publication statusPublished - 2015 Dec 1

Fingerprint

Nanocomposites
Clay
Mechanical properties
Stiffness
Homogenization method
Sensitivity analysis
clay
Physical properties
Elastic moduli

Keywords

  • Homogenization
  • Micromechanics
  • Multiscaling modeling
  • Nanocomposites
  • Stochastic methods

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Ceramics and Composites

Cite this

Stochastic analysis of the interphase effects on the mechanical properties of clay/epoxy nanocomposites. / Almasi, Ashkan; Silani, Mohammad; Talebi, Hossein; Rabczuk, Timon.

In: Composite Structures, Vol. 133, 01.12.2015, p. 1302-1312.

Research output: Contribution to journalArticle

Almasi, Ashkan ; Silani, Mohammad ; Talebi, Hossein ; Rabczuk, Timon. / Stochastic analysis of the interphase effects on the mechanical properties of clay/epoxy nanocomposites. In: Composite Structures. 2015 ; Vol. 133. pp. 1302-1312.
@article{31a44ac0a86b4f3384331618f9b151d7,
title = "Stochastic analysis of the interphase effects on the mechanical properties of clay/epoxy nanocomposites",
abstract = "The polymeric clay nanocomposites are a new class of materials which recently have become the center of attention because of their superior mechanical and physical properties. Several studies have been performed on the mechanical characterization of these nanocomposites; however most of those studies have neglected the effect of the interphase and interfacial region between the clays and the matrix despite of its significance on the mechanical performance of the nanocomposites. Based on a hierarchical multiscale approach on the mesoscopic level, in this study we use the stochastic analysis and the computational homogenization method to analyse the effect of thickness and stiffness of the interphase region on the overall elastic properties of the clay/epoxy nanocomposites. The results show that considering interphase layer reduces the stiffness of clay/epoxy nanocomposites and this decrease becomes significant in higher clay contents. Then, the significance of the stiffness and thickness of the interphase layer on the elastic modulus of clay/epoxy nanocomposites are studied using a sensitivity analysis. Finally, the results of this study are validated with available experimental results.",
keywords = "Homogenization, Micromechanics, Multiscaling modeling, Nanocomposites, Stochastic methods",
author = "Ashkan Almasi and Mohammad Silani and Hossein Talebi and Timon Rabczuk",
year = "2015",
month = "12",
day = "1",
doi = "10.1016/j.compstruct.2015.07.061",
language = "English",
volume = "133",
pages = "1302--1312",
journal = "Composite Structures",
issn = "0263-8223",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Stochastic analysis of the interphase effects on the mechanical properties of clay/epoxy nanocomposites

AU - Almasi, Ashkan

AU - Silani, Mohammad

AU - Talebi, Hossein

AU - Rabczuk, Timon

PY - 2015/12/1

Y1 - 2015/12/1

N2 - The polymeric clay nanocomposites are a new class of materials which recently have become the center of attention because of their superior mechanical and physical properties. Several studies have been performed on the mechanical characterization of these nanocomposites; however most of those studies have neglected the effect of the interphase and interfacial region between the clays and the matrix despite of its significance on the mechanical performance of the nanocomposites. Based on a hierarchical multiscale approach on the mesoscopic level, in this study we use the stochastic analysis and the computational homogenization method to analyse the effect of thickness and stiffness of the interphase region on the overall elastic properties of the clay/epoxy nanocomposites. The results show that considering interphase layer reduces the stiffness of clay/epoxy nanocomposites and this decrease becomes significant in higher clay contents. Then, the significance of the stiffness and thickness of the interphase layer on the elastic modulus of clay/epoxy nanocomposites are studied using a sensitivity analysis. Finally, the results of this study are validated with available experimental results.

AB - The polymeric clay nanocomposites are a new class of materials which recently have become the center of attention because of their superior mechanical and physical properties. Several studies have been performed on the mechanical characterization of these nanocomposites; however most of those studies have neglected the effect of the interphase and interfacial region between the clays and the matrix despite of its significance on the mechanical performance of the nanocomposites. Based on a hierarchical multiscale approach on the mesoscopic level, in this study we use the stochastic analysis and the computational homogenization method to analyse the effect of thickness and stiffness of the interphase region on the overall elastic properties of the clay/epoxy nanocomposites. The results show that considering interphase layer reduces the stiffness of clay/epoxy nanocomposites and this decrease becomes significant in higher clay contents. Then, the significance of the stiffness and thickness of the interphase layer on the elastic modulus of clay/epoxy nanocomposites are studied using a sensitivity analysis. Finally, the results of this study are validated with available experimental results.

KW - Homogenization

KW - Micromechanics

KW - Multiscaling modeling

KW - Nanocomposites

KW - Stochastic methods

UR - http://www.scopus.com/inward/record.url?scp=84941903296&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84941903296&partnerID=8YFLogxK

U2 - 10.1016/j.compstruct.2015.07.061

DO - 10.1016/j.compstruct.2015.07.061

M3 - Article

VL - 133

SP - 1302

EP - 1312

JO - Composite Structures

JF - Composite Structures

SN - 0263-8223

ER -