Development of Synthetic Rock Mass Bonded Block Models to Simulate the Behaviour of Intact Veined Rock

Turichshev, Alexandr; Hadjigeorgiou, John

doi:10.1007/s10706-016-0108-5

Cited by 21 publications

(9 citation statements)

References 18 publications

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“…A good match was obtained for all confinements barring only the σ 3 = 60 MPa model. The cause for the discrepancy can be attributed to the fact that there was only one stress‐strain curve for σ 3 = 60 MPa that attained the residual stress level (see Figure a) and that specimen happened to have a quartz vein in it (potentially leading to a more brittle response; Turichshev & Hadjigeorgiou, ). The models were also able to replicate the CI thresholds for the entire range of confinement considered (Figure c).…”

Section: Calibrated Bbm Results and Discussionmentioning

confidence: 99%

Investigation of the Micromechanical Damage Process in a Granitic Rock Using an Inelastic Bonded Block Model (BBM)

2020

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This study numerically investigates the damage process in a granite using an inelastic multiminerallic block model in two‐dimensional Universal Distinct Element Code. In addition to the commonly considered calibration targets like uniaxial and triaxial strengths, tensile strength, and Young's modulus, attention was paid to reproduce additional attributes such as postpeak response, residual strengths, and confinement‐dependent dilatancy to minimize the nonuniqueness potential of the models. The fracture pattern transitioned from axial cracking to shear banding as the specimen confinement was increased from 0 to 60 MPa. Most notably, the model could exhibit the cohesion‐weakening‐frictional‐strengthening behavior that is typically associated with brittle rocks. The progressive damage mechanism in the unconfined bonded block model (BBM) was subsequently studied using the 2‐D digital image correlation (2‐D‐DIC) approach. To date, the application of the 2‐D‐DIC approach has been restricted only to real material testing; this study, therefore, is an attempt to extend its applicability to numerical models. It was found that 2‐D‐DIC is capable of imaging the simulated microcracking process very well and the results were similar to those observed from real testing on a different granitic rock. Lastly, the numerical‐based DIC results were analyzed to clarify that even if the point of axial stress‐axial strain nonlinearity does not coincide with the point of volumetric strain reversal in unconfined BBMs, the axial stress‐axial strain nonlinearity approach should always be used for determining the crack damage threshold in BBMs.

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Section: Calibrated Bbm Results and Discussionmentioning

confidence: 99%

Investigation of the Micromechanical Damage Process in a Granitic Rock Using an Inelastic Bonded Block Model (BBM)

2020

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“…Detailed explanation in regards to this technique can be found in the studies by Lorig andCundall (1989), andItasca (2009). Figure 8 (Itasca, 2017;Turichshev and Hadjigeorgiou, 2017). Generally, the DEM is a widely used technique in investigation of rock fracturing and failure process (Kazerani and Zhao, 2010;Li et al, 2016;Mayer and Stead, 2017).…”

Section: Distinct Element Methods (Dem)mentioning

confidence: 99%

An overview on advances in computational fracture mechanics of rock

Mohammadnejad

Liu

Chan

et al. 2018

Geosystem Engineering

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Due to its complexities, rock fracturing process still poses many pressing challenges despite intense research efforts. With the rapid development of computational mechanics, numerical techniques have gradually become robust tools for the investigation of rock fracture. Nevertheless, not all of the devised methods are capable of adequately modelling the rock fracture process. For an accurate simulation of the process, a numerical method needs to be capable of modelling crack initiation, propagation, bifurcation, coalescence and separation.This paper provided a review of recent advances in computational analysis of the rock fracture process, which is built upon a number of literature on numerical modelling of mechanics of failure in rock and other brittle materials. After briefly discussing the fundamentals of rock fracture mechanisms, the basic structure of the existing and recently developed numerical techniques such as Finite Element Method, Boundary Element Method, Discrete Element Method, Combined methods and Multiscale coupled method are illustrated. Finally, the strengths and weaknesses of these numerical techniques are discussed and the most promising methods are highlighted.

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“…The DEM typically treats a material as an assembly of discrete particles interacting with one another through interparticle contacts and frictions and solve the Newton's equations of motion governing the clumped particle model, 59 and the bonded block model. 60 The aforementioned enrichments greatly broaden the potential applications of the PB-DDA, which will be demonstrated with examples in the following sections.…”

Section: Introductionmentioning

confidence: 98%

“…Therefore, the link/bolt, spring, and beam become the connectors between particles or blocks. To simulate the behavior of these connectors, whereafter , we construct a particle/block‐based composite contact matrix, which allows other models to be implemented in the PB‐DDA with ease, including the bonded particle model, the clumped particle model, and the bonded block model . The aforementioned enrichments greatly broaden the potential applications of the PB‐DDA, which will be demonstrated with examples in the following sections.…”

Section: Introductionmentioning

confidence: 99%

Variational inequality‐based framework of discontinuous deformation analysis

Fan

Zhao

Zheng

2018

Numerical Meth Engineering

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Summary For modeling discrete particle‐block systems, a new framework of discontinuous deformation analysis is established on the basis of finite‐dimensional variational inequality. The presented method takes into account the contacts, the rolling resistance, and the tensile resistance of cemented interface among particles and blocks using the corresponding variational or quasivariational inequalities. The new formulation avoids using the artificial springs that are usually indispensable in many conventional methods dealing with similar discrete problems and conveniently integrates the rigid circle particles, the nonrigid ring particles, and the arbitrary shape blocks into a uniform framework. The proposed discontinuous deformation analysis approach is further coupled with the finite element method using a node‐based composite contact matrix and several simple transformation matrices to solve practical problems. A particle/block‐based composite contact matrix is constructed to further broaden the application of the proposed method. The accuracy, robustness, and capability of the presented method are demonstrated with examples.

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Development of Synthetic Rock Mass Bonded Block Models to Simulate the Behaviour of Intact Veined Rock

Cited by 21 publications

References 18 publications

Investigation of the Micromechanical Damage Process in a Granitic Rock Using an Inelastic Bonded Block Model (BBM)

Investigation of the Micromechanical Damage Process in a Granitic Rock Using an Inelastic Bonded Block Model (BBM)

An overview on advances in computational fracture mechanics of rock

Variational inequality‐based framework of discontinuous deformation analysis

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