A modified rigid-body-spring method for modeling damage and failure of brittle rocks subjected to triaxial compression

Yao, Chi; He, Chen; Jiang, Qinghui; Shao, Jian-Fu; Zhou, Chuangbing

doi:10.1016/j.compgeo.2022.105046

Cited by 3 publications

(6 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This section will introduce the essential theories for establishing the coupled hydramechanical model. For more details on the mRBSM and EMFN, readers can refer to papers [13][14][15].…”

Section: Methodsmentioning

confidence: 99%

“…This model was modified by Yao et al in 2015 for simulating the progressive fracture process of rocks under plane stress conditions [17]. This model was also expanded to three-dimensional for simulating triaxial and true-triaxial rock failure problems [13].…”

Section: The Modified Rigid-body-spring Modelmentioning

confidence: 99%

“…Compared to the original RBSM, the contacts in mRBSM are distributed throughout the entire interface of two blocks (Figure 1(b) and (c)). This feature made the able to capture the non-uniform opening along an interface between two neighboring blocks while also diminishing the number of microscopic parameters [13].…”

Section: The Modified Rigid-body-spring Modelmentioning

confidence: 99%

“…A bi-linear Mohr-Coulomb failure criterion is adopted to describe the microscopic cracking behaviour of the model, as shown in Once a rupture occurs, the stress state of the contact will be modified and following the Sliding law as illustrated in Figure 2. The microscopic parameters of the mRBSM model (i.e., kn, ks, c, φ1, φ2, σn,cr, and Tcr) can be calibrated by a so-called "trial-and-error" procedure, which was elaborated in the literature [13].…”

Section: The Modified Rigid-body-spring Modelmentioning

confidence: 99%

“…In this study, a novel three-dimensional hydra-mechanical coupling numerical model for simulating the stress and fracturing induced permeability evolution of rock is introduced, which is based on the the Rigid-Body-Spring method (RBSM) [13] and the Equivalent Matrix-Fracture Network (EMFN) [14,15]. Then, the model is calibrated according to the experimental results of the ChuanShanPing (CSP) granite, in which the decrease in permeability after the compressive deformation of granite and the surge in permeability following crack initiation and progression are examined, respectively.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

A discrete approach for modelling the permeability evolution of granite under triaxial and true-triaxial stress conditions

He,

Yao,

Shao

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

Self Cite

View full text Add to dashboard Cite

In deep underground engineering, modelling the seepage characteristics of rock masses under complex stress conditions is crucial for the safe construction and stable operation of a project. The permeability of the rock mass is not only controlled by its internal pore structure but is also closely related to the deformation and fracturing of the rock. Although discrete methods offer advantages in describing the formation and development of fractures, these methods still face challenges due to the difficulties in establishing microscopic seepage models. This paper introduces a new hydro-mechanical coupled numerical model. In this model, a simple method is proposed to couple the Rigid-Body-Spring Method (RBSM) for rock deformation and fracturing simulation and the Equivalent Matrix-Fracture Network (EMFN) for seepage simulation. Subsequently, the model is employed to simulate the permeability of granite under three-dimensional stress conditions. The simulation results show that under hydrostatic stress conditions, the model accurately captures the decrease in permeability due to pore compression and collapse. Additionally, under deviatoric stress conditions, it reveals the stage-wise increase in permeability caused by granite fracturing. Finally, the model is applied to study the permeability evolution behaviour of rocks under true triaxial stress conditions. The results unveiled the significant impact of the intermediate principal stress on permeability evolution and revealing the microscopic mechanisms underpinning these effects. This paper paves a way for enhancing the application of discrete methods in forecasting the permeability evolution behaviour of intricate rock masses.

show abstract

“…This section will introduce the essential theories for establishing the coupled hydramechanical model. For more details on the mRBSM and EMFN, readers can refer to papers [13][14][15].…”

Section: Methodsmentioning

confidence: 99%

Section: The Modified Rigid-body-spring Modelmentioning

confidence: 99%

Section: The Modified Rigid-body-spring Modelmentioning

confidence: 99%

Section: The Modified Rigid-body-spring Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A discrete approach for modelling the permeability evolution of granite under triaxial and true-triaxial stress conditions

He,

Yao,

Shao

et al. 2024

IOP Conf. Ser.: Earth Environ. Sci.

Self Cite

View full text Add to dashboard Cite

show abstract

True-triaxial simulation of sandstone with full range of σ2 based on the Rigid-Body-Spring method

He,

Yao,

Fan

et al. 2024

Computers and Geotechnics

View full text Add to dashboard Cite

A Partitioned Rigid-Element and Interface-Element Method for Rock-Slope-Stability Analysis

Sheng

Liu

et al. 2023

Applied Sciences

View full text Add to dashboard Cite

The stability analysis of rock slopes has been a prominent topic in the field of rock mechanics, primarily due to the widespread occurrence of discontinuous structural planes in rock masses. Based on this complex characteristic of rock slopes, this paper proposes a novel numerical method, the Partitioned-Rigid-Element and Interface-Element (PRE-IE) method. In the PRE-IE method, the structure is modeled as several rigid bodies and discontinuous structural planes, which are, respectively, divided into partitioned rigid elements and interface elements. Taking the contact force of node pairs and the displacement of the rigid body centroid as mixed variables, according to the principle of minimum potential energy, the governing equations of PRE-IE can be established using the Lagrange multiplier method and then solved using the nonlinear contact iterative method and the incremental method. A classic case study demonstrates that using the failure of all contact node pairs as the criterion for slope failure is appropriate. This criterion is objective and avoids the potential impact of personal bias on safety factor calculations. Two numerical examples of differently shaped slopes are provided to verify the correctness and validity of the PRE-IE method. By comparing the safety factor calculated using the PRE-IE method with those obtained from other different methods, as well as comparing the computational time, it is shown that the PRE-IE method, in combination with the SRM, can accurately and efficiently analyze the stability problems of rock slopes.

show abstract

A modified rigid-body-spring method for modeling damage and failure of brittle rocks subjected to triaxial compression

Cited by 3 publications

References 51 publications

A discrete approach for modelling the permeability evolution of granite under triaxial and true-triaxial stress conditions

A discrete approach for modelling the permeability evolution of granite under triaxial and true-triaxial stress conditions

True-triaxial simulation of sandstone with full range of σ2 based on the Rigid-Body-Spring method

A Partitioned Rigid-Element and Interface-Element Method for Rock-Slope-Stability Analysis

Contact Info

Product

Resources

About