In this study, the effects of relative density and confining pressure on the shear characteristics of round gravel are investigated using a large-scale triaxial apparatus and the discrete element method. A simple and efficient numerical method for simulating flexible membranes is introduced. The results show that the stress-strain curves develop from hardened to softened type with increasing relative density, while the stress-strain curves develop from softened to hardened type with increasing confining pressure. As the axial strain increases, the strong contact force chains are vertically distributed, and the larger the relative density and confining pressure, the greater the number and thickness of the strong contact force chains. In the shear process, the distribution of average normal and tangential contact forces show “peanut-shaped” and “petal-shaped”, respectively. The increase in relative density increases the anisotropy of the specimen, while the increase in confining pressure results in a decrease. A linear relationship exists between the macroscopic stress ratio and the anisotropy coefficient. The anisotropy coefficient of the normal contact force provides the greatest contribution to the macroscopic shear strength (about 55%), followed by the anisotropy coefficient of the contact normal (about 26%) and that of the tangential contact force (about 19%).


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Discrete Element Simulation of Macro and Micro Mechanical Properties of Round Gravel Material under Triaxial Stress


    Weitere Titelangaben:

    KSCE J Civ Eng


    Beteiligte:
    Ma, Shaokun (Autor:in) / Huang, Haijun (Autor:in) / Tian, Fapai (Autor:in) / Gong, Jian (Autor:in) / Zhang, Jiabing (Autor:in) / Duan, Zhibo (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2024-05-01


    Format / Umfang :

    15 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Macro-Micro Mechanical Behavior of Crushable Granular Materials under Generalized Stress Conditions

    Liu, Yiming / Xu, Chenming / Xu, Guofang et al. | Springer Verlag | 2021



    Characterization of Triaxial Braided Composite Material Properties for Impact Simulation

    Roberts, G. / Goldberg, R. / Littell, J. et al. | British Library Conference Proceedings | 2009


    Characterization of triaxial braided composite material properties for impact simulation

    Roberts, Gary D. / Goldberg, Robert K. / Binienda, Wieslaw K. et al. | Tema Archiv | 2009


    Fatigue crack closure analysis under triaxial stress constraint

    Wang, J. / Guo, W. / Shen, Y. | British Library Online Contents | 1998