Nanoscale analysis of tensile properties and fracture of nanoreinforced epoxy polymer using micromechanics

Zhenqing Wang, Fang Liu, Wenyan Liang, Li Min Zhou

Research output: Journal article publicationJournal articleAcademic researchpeer-review

8 Citations (Scopus)

Abstract

Tensile properties of nanocomposites (silica/epoxy) with some aggregations of nanosilica are studied by nanoscale simulation, particularly with regard to the effective modulus and tensile strength. Three analytical models are used to obtain the effective elastic modulus of nanoparticle-reinforced composites (silica/epoxy). Then a multi-scale finite element method is proposed to study the interaction of particles and matrix for silica/rubber/epoxy systems at the nanoscale near a crack tip. A multi-scale finite element model with effective homogeneous material properties is used to study the fracture of a compact tension sample. The simulation results for effective elastic modulus and tensile strength of SiO2particle-reinforced epoxy composites, and fracture toughness at the nanoscale for SiO2/rubber/epoxy with various volume fractions, show good agreement with previously published experimental data. It is demonstrated that the proposed parametric model can be used to efficiently study the toughness mechanisms at the nanoscale.
Original languageEnglish
Pages (from-to)1224-1233
Number of pages10
JournalJournal of Reinforced Plastics and Composites
Volume32
Issue number16
DOIs
Publication statusPublished - 1 Aug 2012

Keywords

  • finite element analysis
  • micromechanics
  • Nanocomposites

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Polymers and Plastics
  • Materials Chemistry

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