Extended finite element simulation of step-path brittle failure in rock slopes with non-persistent en-echelon joints

Zhou, Xiaoping; Chen, Junwei

doi:10.1016/j.enggeo.2019.01.012

Cited by 63 publications

(10 citation statements)

References 39 publications

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“…The results showed that XFEM is suitable for modeling the growth and coalescence of multiple cracks in geomaterials under compressive loads as well as tensile loads because the frictional contact of crack surfaces is considered in the modeling. [112][113][114][115][116] Using displacement discontinuity method (DDM), Scavia and Castelli 117 conducted some preliminary works through a numerical technique, BEMCOM, to investigate the mechanical behavior of rock bridges in materials containing two and three pre-existing flaws. Through a numerical technique, FROCK, Vasarhelyi and Bobet 118 modeled the cracking behaviors of two bridged flaws in gypsum under uniaxial compression.…”

Section: Numerical Studiesmentioning

confidence: 99%

Compression‐induced crack initiation and growth in flawed rocks: A review

Zhou

Zhang

Yang

et al. 2021

Fatigue Fract Eng Mat Struct

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Section: Numerical Studiesmentioning

confidence: 99%

Compression‐induced crack initiation and growth in flawed rocks: A review

Zhou

Zhang

Yang

et al. 2021

Fatigue Fract Eng Mat Struct

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“…And XFEM has high computational efficiency. Therefore, this method has been widely applied in fracture mechanics and engineering (Sanborn and Jean H, 2011;Wang et al, 2015;Zhou and Chen, 2019).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Role of Crown Crack in Cohesive Soil Slope and Its Effect on Slope Stability Based on Extended Finite Element Method

Bao

Zhang

et al. 2021

Preprint

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Tensile cracks in soil slopes, especially developing at the crown, have been increasingly recognized as the signal of slope metastability. In this paper, the role of crown cracks in natural soil slopes was investigated and their effect on stability was studied. A numerical slope model based on the extended finite element method (XFEM) simulating the tensile behavior of soil was used. Before the simulation, a numerical soil tensile test was applied to validate the use of XFEM on tensile behavior of soil. Slope failure was simulated by using strength reduction technique, which can determine the potential slip surface of slope. The simulation results show that the crown crack forms in natural soil slopes when the plastic zone starts penetrating, and therefore it is reasonable to consider the crown crack as the signal of slope metastability. A sensitivity analysis shows that cracks are at the position of the tension zone or very long can obviously affect the slope stability. The stress variation analysis from the initial deformation to slip surface penetration shows that the slope is at a state of compressive stress initially. When plastic zone starts to penetrate, the upper part of slope generates tension zone, but the extent of tension zone is limited until slope failure. This shows why tensile cracks are difficult to form and be stretched in the deep part of the slope. The application of XFEM on slope stability analysis can be used to assess the tensile strength of soil and predict slope failure disaster.

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“…However, it is difficult to directly visualize the micro-crack generation and underlying stress field of rocks through experimental investigation. 21 Thus, numerical methods such as extended finite element method (EFEM), 22,23 general particle dynamics (GPD), 24,25 peridynamics (PD), 26,27 and discrete element method (DEM), 28 have been adopted by researchers recently to track the micro-cracks and stress distribution in rocks. Among these numerical methods, the DEM has attracted much attention.…”

Section: Introductionmentioning

confidence: 99%

Deformation and failure characteristics of sandstone subjected to true‐triaxial unloading: An experimental and numerical study

Fan

Jiang

et al. 2021

Fatigue Fract Eng Mat Struct

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In this research, we conducted both laboratory experiments and discrete element simulations to investigate the influence of maximum principal stress level on true‐triaxial unloading behaviors of sandstone samples. The results show that as the level of σ1 at the unloading point increases, the ultimate bearing capacity of sandstone sample is increasingly strengthened, while the sample collapses more easily during the unloading process, and the failure mode of sample changes from mixed tensile‐shear failure to shear failure. With the increase in the level of σ1, the accumulative micro‐cracks at the unloading point and micro‐crack generation rate during the unloading phase exhibit increasing trends, while the ratio between the number of tensile micro‐cracks and shear micro‐cracks generally shows a downward trend. The formation of macro fracture in sandstone sample is closely related to the material inhomogeneity and true‐triaxial stress state.

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Extended finite element simulation of step-path brittle failure in rock slopes with non-persistent en-echelon joints

Cited by 63 publications

References 39 publications

Compression‐induced crack initiation and growth in flawed rocks: A review

Compression‐induced crack initiation and growth in flawed rocks: A review

Investigation of the Role of Crown Crack in Cohesive Soil Slope and Its Effect on Slope Stability Based on Extended Finite Element Method

Deformation and failure characteristics of sandstone subjected to true‐triaxial unloading: An experimental and numerical study

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