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A coupled hydro-mechanical non-ordinary state-based peridynamics for the fissured porous rocks
Engineering Analysis With Boundary Elements ( IF 3.3 ) Pub Date : 2020-12-08 , DOI: 10.1016/j.enganabound.2020.12.001
Yundong Shou , Xiaoping Zhou

A novel coupled hydro-mechanical non-ordinary state-based peridynamics is proposed to investigate hydro-mechanical problems in fissured porous rocks. The hydraulic bond is introduced to the coupled numerical model to transfer the water flow stored in material points. The flow equations for fissured porous rocks are obtained in the framework of peridynamics. Then, the relationship between peridynamic hydraulic conductivity and classic hydraulic conductivity for one-dimensional and two-dimensional flow cases is established. Moreover, Biot's porous media theory is employed to determine the deformation caused by water pressure, which is introduced to the non-ordinary state-based peridynamic government equation. In addition, the effects of mechanical deformation and fracture on hydraulic conductivity are considered in the coupled hydro-mechanical non-ordinary state-based peridynamic model. Finally, three different numerical experiments are carried out to verify the correctness of the coupled hydro-mechanical peridynamic model proposed in this paper, and it is found that the present numerical results are in good agreement with the analytical solutions.



中文翻译:

裂隙多孔岩石的基于水力-力学非耦合状态的耦合动力学

提出了一种新颖的基于非常规状态的流体力学耦合动力学,以研究裂隙多孔岩石中的流体力学问题。将液压键引入到耦合数值模型中,以传递存储在材料点中的水流。在裂隙动力学的框架内获得了裂隙多孔岩石的流动方程。然后,建立了一维和二维流动情况下的围驱动导水率与经典导水率之间的关系。此外,利用比奥的多孔介质理论来确定由水压引起的变形,并将其引入基于非常规状态的周动力政府方程。此外,在基于非常规状态的流体力学耦合动力学模型中考虑了机械变形和断裂对导水率的影响。最后,通过三个不同的数值实验验证了本文提出的水力耦合动力力学模型的正确性,发现目前的数值结果与解析解吻合良好。

更新日期:2020-12-08
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