Elastomer composites based on filler with negative coefficient of thermal expansion: Experiments and numerical simulations of stress-strain behaviour

S. N. Shubin, A. G. Akulichev, A. B. Freidin

Research output

Abstract

We consider composites made of hydrogenated nitrile butadiene rubber (HNBR) and particles of zirconium tungstate (ZrW2O8). We focus on finite element (FE) modelling of a finite-strain mechanical behaviour of the composite and validation of the numerical simulation against experiments. Based on examination of composite microstructure by scanning electron microscope and optical analysis of particle images, realistic representative volume elements (RVE) of microstructure are generated taking into consideration the particles circularity and size distributions. Then FE simulations are performed to study the influence of the microstructure and matrix-filler interface conditions on the mechanical properties of the composites. It is assumed that the mechanical behaviour of rubber is non-linear, while the tungstate particles are modelled by a linear elastic material. The FE simulations reproduce uniaxial compression tests. Two types of interface condition between matrix and particles are simulated: A perfect adhesion and absence of adhesion. Corresponding stress-strain curves are constructed. Comparison with experiments shows that the real stress-strain curves for pre-loaded samples path within intervals given by the modelling, i.e. pre-loading leads to partial damage of bonding between matrix and particles.

Original languageEnglish
Pages (from-to)278-287
Number of pages10
JournalMaterials Physics and Mechanics
Volume32
Issue number3
Publication statusPublished - 2017
Externally publishedYes

Fingerprint

Elastomers
elastomers
fillers
Thermal expansion
Fillers
thermal expansion
composite materials
Rubber
Computer simulation
Composite materials
coefficients
Stress-strain curves
Microstructure
tungstates
Adhesion
simulation
Experiments
rubber
Nitriles
microstructure

Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

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title = "Elastomer composites based on filler with negative coefficient of thermal expansion: Experiments and numerical simulations of stress-strain behaviour",
abstract = "We consider composites made of hydrogenated nitrile butadiene rubber (HNBR) and particles of zirconium tungstate (ZrW2O8). We focus on finite element (FE) modelling of a finite-strain mechanical behaviour of the composite and validation of the numerical simulation against experiments. Based on examination of composite microstructure by scanning electron microscope and optical analysis of particle images, realistic representative volume elements (RVE) of microstructure are generated taking into consideration the particles circularity and size distributions. Then FE simulations are performed to study the influence of the microstructure and matrix-filler interface conditions on the mechanical properties of the composites. It is assumed that the mechanical behaviour of rubber is non-linear, while the tungstate particles are modelled by a linear elastic material. The FE simulations reproduce uniaxial compression tests. Two types of interface condition between matrix and particles are simulated: A perfect adhesion and absence of adhesion. Corresponding stress-strain curves are constructed. Comparison with experiments shows that the real stress-strain curves for pre-loaded samples path within intervals given by the modelling, i.e. pre-loading leads to partial damage of bonding between matrix and particles.",
keywords = "Damage, Debonding., Effective stress-strain curve, Elastomer composite, Representative volume element",
author = "Shubin, {S. N.} and Akulichev, {A. G.} and Freidin, {A. B.}",
year = "2017",
language = "English",
volume = "32",
pages = "278--287",
journal = "ФИЗИКА И МЕХАНИКА МАТЕРИАЛОВ",
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T2 - Experiments and numerical simulations of stress-strain behaviour

AU - Shubin, S. N.

AU - Akulichev, A. G.

AU - Freidin, A. B.

PY - 2017

Y1 - 2017

N2 - We consider composites made of hydrogenated nitrile butadiene rubber (HNBR) and particles of zirconium tungstate (ZrW2O8). We focus on finite element (FE) modelling of a finite-strain mechanical behaviour of the composite and validation of the numerical simulation against experiments. Based on examination of composite microstructure by scanning electron microscope and optical analysis of particle images, realistic representative volume elements (RVE) of microstructure are generated taking into consideration the particles circularity and size distributions. Then FE simulations are performed to study the influence of the microstructure and matrix-filler interface conditions on the mechanical properties of the composites. It is assumed that the mechanical behaviour of rubber is non-linear, while the tungstate particles are modelled by a linear elastic material. The FE simulations reproduce uniaxial compression tests. Two types of interface condition between matrix and particles are simulated: A perfect adhesion and absence of adhesion. Corresponding stress-strain curves are constructed. Comparison with experiments shows that the real stress-strain curves for pre-loaded samples path within intervals given by the modelling, i.e. pre-loading leads to partial damage of bonding between matrix and particles.

AB - We consider composites made of hydrogenated nitrile butadiene rubber (HNBR) and particles of zirconium tungstate (ZrW2O8). We focus on finite element (FE) modelling of a finite-strain mechanical behaviour of the composite and validation of the numerical simulation against experiments. Based on examination of composite microstructure by scanning electron microscope and optical analysis of particle images, realistic representative volume elements (RVE) of microstructure are generated taking into consideration the particles circularity and size distributions. Then FE simulations are performed to study the influence of the microstructure and matrix-filler interface conditions on the mechanical properties of the composites. It is assumed that the mechanical behaviour of rubber is non-linear, while the tungstate particles are modelled by a linear elastic material. The FE simulations reproduce uniaxial compression tests. Two types of interface condition between matrix and particles are simulated: A perfect adhesion and absence of adhesion. Corresponding stress-strain curves are constructed. Comparison with experiments shows that the real stress-strain curves for pre-loaded samples path within intervals given by the modelling, i.e. pre-loading leads to partial damage of bonding between matrix and particles.

KW - Damage

KW - Debonding.

KW - Effective stress-strain curve

KW - Elastomer composite

KW - Representative volume element

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JO - ФИЗИКА И МЕХАНИКА МАТЕРИАЛОВ

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