Numerical simulation of deformation and fracture of a material with a polysilazane-based coating

R. R. Balokhonov, A. V. Zinovyev, V. A. Romanova, R. A. Bakeev, O. S. Zinovyeva

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    The paper studies the localization of plastic deformation and fracture in a material with a porous coating. A dynamic boundary value problem in the plane strain formulation is solved. The numerical simulation is performed by the finite difference method. The composite structure corresponds to the experimentally observed one and is specified explicitly in the calculation. A generation procedure of the initial finite-difference grid is developed to describe the coating structure with adjustable porosity and geometry of the substrate-coating interface. Constitutive equations for the steel substrate include an elastic-plastic model of an isotropically hardening material. The ceramic coating is described by a brittle fracture model on the basis of the Huber criterion which accounts for crack nucleation in triaxial tension zones. It is shown that the specific character of deformation and fracture of the studied composite results from the presence of local tensile regions in the vicinity of pores and along the coating-substrate interface, in both tension and compression of the coated material. The interrelation between inhomogeneous plastic flow in the steel substrate and crack propagation in the coating is studied.

    Original languageEnglish
    Pages (from-to)430-440
    Number of pages11
    JournalPhysical Mesomechanics
    Volume19
    Issue number4
    DOIs
    Publication statusPublished - 1 Oct 2016

    Keywords

    • fracture
    • mechanics of heterogeneous media
    • numerical simulation
    • plasticity
    • porous ceramic coatings

    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Surfaces and Interfaces

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  • Cite this

    Balokhonov, R. R., Zinovyev, A. V., Romanova, V. A., Bakeev, R. A., & Zinovyeva, O. S. (2016). Numerical simulation of deformation and fracture of a material with a polysilazane-based coating. Physical Mesomechanics, 19(4), 430-440. https://doi.org/10.1134/S1029959916040093