Numerical Simulation on Tensile Failure of Rock-Like Heterogeneous Material Using a Modified SPH Method

Q. Wang, Guowei Ma, X.J. Wang

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    © World Scientific Publishing Company. A modified smoothed particle hydrodynamics (SPH) method is applied to simulate the dynamic tensile failure of rock-like heterogeneous materials. The material heterogeneities are represented by different mechanical properties with a Weibull distribution at different particles over the specimen. An elasto-plastic-damage model is adopted to simulate material failure. Numerical simulations are performed for three specimens with different degrees of heterogeneity under quasi-static and dynamic loading conditions, respectively. The effects of strength criterion coefficient b on the predicted tensile strength are also discussed. Results show that the material heterogeneity has significant effect on the dynamic tensile failure, especially at a higher strain rate loading condition. At a lower strain rate, the failure mode of heterogeneous material is very much similar to that of homogeneous materials. At a higher strain rate, plenty of micro cracks occur forming a failure band in the tension zones. Moreover, the value of strength criterion coefficient b has a considerable influence on the tensile strength under a higher loading rate.
    Original languageEnglish
    Pages (from-to)1550039-1 - 1550039-25
    JournalInternational Journal of Computational Methods
    Volume12
    Issue number6
    DOIs
    Publication statusPublished - 2015

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