Modeling of the stress-strain behavior of an epoxy-based nanocomposite filled with silica nanoparticles

Andrey I. Dmitriev, Ines Häusler, Werner Österle, Bernd Wetzel, Ga Zhang

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    The method of movable cellular automata (MCA) was applied to simulate the stress-strain behavior of a nanocomposite consisting of an epoxy matrix and 6 vol.% silica nanoparticles. The size of the elements used for modeling was fixed at 10 nm, corresponding approximately to the diameter of the filler particles. Since not only the stress-strain response of the two constituents but also debonding of neighboring particles and granular flow was taken into account, plastic deformation as well as crack initiation and propagation could be simulated with the model. Modeling results were compared with tensile test results of both, pure epoxy as well as the epoxy-6 vol.% SiO2 composite. Since assuming bulk properties of the two constituents did not yield satisfactory results, slight modifications of the nanoparticle response functions and nanostructures were tested numerically. Finally, it was observed that only the assumption of slightly increased strength properties of the epoxy yielded good correlation between experimental and modeling results. This was attributed to an increased cross linking of the epoxy caused by the presence of silica nanoparticles.

    Original languageEnglish
    Pages (from-to)950-956
    Number of pages7
    JournalMaterials and Design
    Volume89
    DOIs
    Publication statusPublished - 5 Jan 2016

    Fingerprint

    Silicon Dioxide
    Nanocomposites
    Silica
    Nanoparticles
    Debonding
    Cellular automata
    Crack initiation
    Fillers
    Crack propagation
    Nanostructures
    Plastic deformation
    Composite materials

    Keywords

    • Computational mechanics
    • Mechanical properties
    • Modeling
    • Nanocomposites
    • Polymer matrix

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

    Cite this

    Modeling of the stress-strain behavior of an epoxy-based nanocomposite filled with silica nanoparticles. / Dmitriev, Andrey I.; Häusler, Ines; Österle, Werner; Wetzel, Bernd; Zhang, Ga.

    In: Materials and Design, Vol. 89, 05.01.2016, p. 950-956.

    Research output: Contribution to journalArticle

    Dmitriev, Andrey I. ; Häusler, Ines ; Österle, Werner ; Wetzel, Bernd ; Zhang, Ga. / Modeling of the stress-strain behavior of an epoxy-based nanocomposite filled with silica nanoparticles. In: Materials and Design. 2016 ; Vol. 89. pp. 950-956.
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    AU - Zhang, Ga

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