Application of slightly overlapped circular particles assembly in numerical simulation of rocks with high friction angles

Fakhimi, A.

doi:10.1016/j.enggeo.2004.03.006

Cited by 80 publications

(33 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fakhimi (2004) proposed a slightly overlapped circular particle interaction (SOCPI) model to resolve the above second and third problems. The calibration issue of a SOCPI material that is based on the dimensional analysis is addressed in this paper.…”

Section: Introductionmentioning

confidence: 99%

“…This stress is called genesis pressure ( 0 ) and its role is to create a small overlap between cylinders in contact. This small overlap is responsible for obtaining more realistic friction angle and ratio of compressive to tensile strength of the synthetic material (Fakhimi, 2004). The last step in sample preparation is to initialize the normal and shear contact stresses to zero and to introduce normal and shear bonds and friction between the cylinders in contact.…”

Section: Introductionmentioning

confidence: 99%

“…The last step in sample preparation is to initialize the normal and shear contact stresses to zero and to introduce normal and shear bonds and friction between the cylinders in contact. More details about sample preparation are given in Fakhimi (2004).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Application of Dimensional Analysis in Calibration of a Discrete Element Model for Rock Deformation and Fracture

Fakhimi

Villegas

2006

Rock Mech. Rock Engng.

Self Cite

176

View full text Add to dashboard Cite

SummaryA discrete element approach was used in the simulation of rock fracture. The numerical synthetic material was made of rigid circular particles or cylinders that have interaction through normal and shear springs. The cylinders were bonded to each other at the contact points to withstand the applied loads. To characterize the microscopic properties of this synthetic material, a dimensional analysis approach was presented. It was shown that the dimensionless parameters and graphs obtained were useful tools for fast and efficient calibration of a synthetic material. This calibration method was employed for finding a numerical model for Pennsylvania Blue Sandstone. The numerical model could mimic many deformational and failure characteristics of the sandstone in both conventional and some non-conventional stress paths.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Application of Dimensional Analysis in Calibration of a Discrete Element Model for Rock Deformation and Fracture

Fakhimi

Villegas

2006

Rock Mech. Rock Engng.

Self Cite

176

View full text Add to dashboard Cite

show abstract

“…Discrete element method (DEM) is proved to be a very effective method in modelling rock-like materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. The discontinuous nature of DEM makes DEM very suitable for dealing with the initiation and propagation of micro cracks in rock-like materials.…”

Section: Introductionmentioning

confidence: 99%

Bonded-Particle Model with Nonlinear Elastic Tensile Stiffness for Rock-Like Materials

Ouyang

Chen

2017

Applied Sciences

View full text Add to dashboard Cite

Abstract:The bonded-particle model (BPM) is a very efficient numerical method in dealing with initiation and propagation of cracks in rocks and can model the fracture processes and most of macro parameters of rocks well. However, typical discrete element method (DEM) underestimates the ratio of the uniaxial compressive strength to the tensile strength (UCS/TS). In this paper, a new DEM method with a nonlinear elastic tensile model embedded in BPM is proposed, which is named as nonlinear elastic tensile bonded particle model (NET-BPM). The relationships between micro parameters in NET-BPM and macro parameters of specimens are investigated by simulating uniaxial compression tests and direct tension tests. The results show that both the shape coefficient of the nonlinear elastic model and the bond width coefficient are important in predicting the value of UCS/TS, whose value ranging from 5 to 45 was obtained in our simulations. It is shown that the NET-BPM model is able to reproduce the nonlinear behavior of hard rocks such as Lac du Bonnet (LDB) granite and the quartzite under tension and the ratio of compressive Young's modulus to tensile Young's modulus higher than 1.0. Furthermore, the stress-strain curves in the simulations of LDB granite and the quartzite with NET-BPM model are in good agreement with the experimental results. NET-BPM is proved to be a very suitable method for modelling the deformation and fracture of rock-like materials.

show abstract

“…However, the BEM has been used to a limited extent, primarily in specialized applications, such as the heterogeneous formation of basins. Similarly, as a dynamic numerical analysis method, the DEM used to simulate the failure process of rocks, permitting large deformation and obvious slide [35] [36] [37] [38]. Without doubt, rock rheology of the DEM should be further considered, some weak points should be improved and perfected, such as treatment of free movable boundary and coupling problem.…”

Section: Introductionmentioning

confidence: 99%

Geomechanical Modeling of Stress and Fracture Distribution during Contractional Fault-Related Folding

Gu¹

2017

GEP

View full text Add to dashboard Cite

Understanding and predicting the distribution of fractures in the deep tight sandstone reservoir are important for both gas exploration and exploitation activities in Kuqa Depression. We analyzed the characteristics of regional structural evolution and paleotectonic stress setting based on acoustic emission tests and structural feature analysis. Several suites of geomechanical models and experiments were developed to analyze how the geological factors influenced and controlled the development and distribution of fractures during folding. The multilayer model used elasto-plastic finite element method to capture the stress variations and slip along bedding surfaces, and allowed large deformation. The simulated results demonstrate that this novel Quasi-Binary Method coupling composite failure criterion and geomechanical model can effectively quantitatively predict the developed area of fracture parameters in fault-related folds. High-density regions of fractures are mainly located in the fold limbs during initial folding stage, then gradually migrate from forelimb to backlimb, from limbs to hinge, from deep to shallow along with the fold uplift. Among these factors, the fold uplift and slip displacement along fault have the most important influence on distributions of fractures and stress field, meanwhile the lithology and distance to fault have also has certain influences. When the uplift height exceeds approximately 55 percent of the total height of fold the facture density reaches a peak, which conforms to typical top-graben fold type with large amplitude and high-density factures in the top. The overall simulated results match well with core observation and FMI results both in the whole geometry and fracture distribution.

show abstract

Application of slightly overlapped circular particles assembly in numerical simulation of rocks with high friction angles

Cited by 80 publications

References 8 publications

Application of Dimensional Analysis in Calibration of a Discrete Element Model for Rock Deformation and Fracture

Application of Dimensional Analysis in Calibration of a Discrete Element Model for Rock Deformation and Fracture

Bonded-Particle Model with Nonlinear Elastic Tensile Stiffness for Rock-Like Materials

Geomechanical Modeling of Stress and Fracture Distribution during Contractional Fault-Related Folding

Contact Info

Product

Resources

About