Shale is classified as a poroelastic material as the shale matrix has comparable stiffness with its constituent solid grains. Also, shales at large depth are often fully saturated. Due to their low permeability, which can be in the nano-Darcy range, shales remain undrained during typical loading conditions. Additionally, shales are quasi-brittle materials which can exhibit very pronounced peak shear stress followed by pronounced strain softening during shearing. All these unique aspects of shale behavior must be considered in developing a model that predicts the change of the pore pressure, the effective stress response and the undrained shear strength of shales during loading. This study presents a coupled plastic-damage constitutive model which considers poroelastic effect with the objective to predict the mechanical behavior of saturated shales under undrained condition. The proposed model couples the plastic mechanism, which is formulated on the effective stress space, and the damage mechanism which is responsible for the elasticity degradation and the post-peak softening of shale. Validation of the proposed model against triaxial est results demonstrates that the proposed model can predict the stress-strain behavior, the effective stress path and the pore pressure evolution of shale specimen during shearing.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Coupled Damage-Plasticity Modelling of Saturated Shale under Undrained Condition


    Weitere Titelangaben:

    KSCE J Civ Eng


    Beteiligte:
    Ma, Shuqi (Autor:in) / Gutierrez, Marte (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2021-01-01


    Format / Umfang :

    10 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





    Analysis of Undrained Shear Characteristics and Structural Damage of Granite Residual Soil

    Yin, Song / Liu, Pengfei / Yan, Pan et al. | Springer Verlag | 2023



    Performance of CAL/APT Drained and Undrained Pavements Under HVS Loading

    Harvey, J. / Louw, L. / Guada, I. et al. | Transportation Research Record | 1998


    Peak Undrained Resistance of Loose Sands

    Norris, G. | Online Contents | 1997