In this paper, a novel node-based explicit smoothed particle finite element method (SPFEM), on the basis of the particle finite element method (PFEM) framework, is utilized to evaluate the stability of slopes and to simulate the post-failure behavior of soil. The main advantage of SPFEM in slope stability analysis lies in its capabilities to consider the whole dynamic failure process of slope and to simulate large deformation and post-failure of soils. For the stability analysis of a cohesive soil slope, the shear strength reduction technique with a kinetic energy-based criterion for distinguishing slope failure is adopted to obtain the factor of safety (FOS) of a slope, and the FOS is compared with that obtained by the classical FEM and LEM approaches for further validation. Then, the dynamic failure process of a non-cohesive granular material slope is simulated using Drucker-Prager constitutive model. The influence of friction resistance of granular material, as well as the repose angle of slope after failure, is discussed. Finally, the progressive failure behavior of a long clayey slope is modeled using SPFEM in conjunction with a strain-softening Tresca constitutive model. The retrogressive failure behavior of a long clayey slope is analyzed.

中文翻译：

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基于光滑粒子有限元法的大变形边坡破坏动力学建模

本文在粒子有限元法（PFEM）框架的基础上，利用一种新的基于节点的显式平滑粒子有限元法（SPFEM）来评估边坡的稳定性并模拟其破坏后的行为。土壤。SPFEM在边坡稳定性分析中的主要优势在于能够考虑边坡的整个动力破坏过程，模拟土体的大变形和破坏后的过程。对于粘性土边坡的稳定性分析，采用基于动能判别边坡破坏判据的抗剪强度折减技术求出边坡的安全系数（FOS），并与由下式得到的安全系数进行比较。用于进一步验证的经典 FEM 和 LEM 方法。然后，使用 Drucker-Prager 本构模型模拟非粘性颗粒材料边坡的动态破坏过程。讨论了颗粒材料的摩擦阻力以及破坏后边坡的休止角的影响。最后，使用 SPFEM 结合应变软化 Tresca 本构模型对长粘土质边坡的渐进破坏行为进行建模。分析了长粘土质边坡的倒退破坏行为。