Investigation on Mechanical Behaviors of Sandstone with Two Preexisting Flaws under Triaxial Compression

Huang, Da; Gu, Dongming; Yanɡ, Chao; Huang, Runqiu; Fu, Guoyang

doi:10.1007/s00603-015-0757-3

Cited by 157 publications

(40 citation statements)

References 38 publications

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“…Huang et al [39] conducted conventional triaxial compression experiments on sandstone specimens with two closed nonoverlapping fissures. As shown in Figure 14, four types of sandstone specimens were tested.…”

Section: Biaxial and Triaxialmentioning

confidence: 99%

“…23 mm 100mm Figure 14: Four types of tested sandstone specimen and geometry of two preexisting nonoverlapping filled flaws: type A is intact specimen; types B-D are specimens with two different preexisting flaws [39]. [122] investigated the effects of loading direction on failure load and failure modes for Brazilian tests on jointed coal rock.…”

Section: Tension Loadingmentioning

confidence: 99%

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Crack Initiation, Propagation, and Failure Characteristics of Jointed Rock or Rock-Like Specimens: A Review

Cao

Lin

Fan

et al. 2019

Advances in Civil Engineering

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Rock masses are heterogeneous materials containing a large number of discontinuities, and the failure of the natural rock mass is induced by the crack propagation and coalescence of discontinuities, especially for the rock mass around tunnel or underground space. Because the deformation or failure process of jointed rock mass exhibits strongly nonlinear characteristics, it is also very difficult to predict the strength and failure modes of the rock mass. Therefore, it is very necessary to study the failure mechanisms of jointed rock mass under different stress conditions. Apart from the stress condition, the discontinuities geometry also has a significant influence on the mechanical behavior of jointed rock mass. Then, substantial, experimental, and numerical efforts have been devoted to the study of crack initiation, propagation, and coalescence of rock or rock-like specimens containing different kinds of joints or fissures. The purpose of this review is to discuss the development and the contribution of the experiment test and numerical simulation in failure behavior of jointed rock or rock-like specimens. Overall, this review can be classified into three parts. It begins by briefly explaining the significance of studying these topics. Afterwards, the experimental and numerical studies on the strength, deformation, and failure characteristics of jointed rock or rock-like materials are carried out and discussed.

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Section: Biaxial and Triaxialmentioning

confidence: 99%

Section: Tension Loadingmentioning

confidence: 99%

Crack Initiation, Propagation, and Failure Characteristics of Jointed Rock or Rock-Like Specimens: A Review

Cao

Lin

Fan

et al. 2019

Advances in Civil Engineering

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“…From the viewpoint of laboratory experiments, acoustic emission (AE), photographic monitoring, digital image correlation (DIC), and computed tomography (CT) scanning techniques are adopted to capture the crack evolution process in rock that contains pre-existing flaws under compression or tension. [12][13][14][15] From the view point of numerical simulation, crack initiation and coalescence process of rock is reproduced in RFPA3D, 16 FLAC, 17 AUTODYN, 18 FEMDEM, 19 NOSB-PD, 20 NMM, 21 GPD, 22 and particle flow code (PFC). 23 To simulate the loading-type failure of underground openings, Fakhimi et al 24 tested a sandstone specimen that contains a central hole under biaxial compression.…”

Section: Introductionmentioning

confidence: 99%

Cracking process of a granite specimen that contains multiple pre‐existing holes under uniaxial compression

Huang

Yang

Tian

2019

Fatigue Fract Eng Mat Struct

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The pre‐existence of openings, which play an important role in the mechanical properties and cracking behaviours of rock, is prevalent in rock mass. The interaction among pre‐existing openings (or holes) complicates the instability problems when rock contains multiple holes. Studying the strength failure behaviour of rock that contains multiple pre‐existing holes contributes to the fundamental knowledge of the excavation and stability of underground rock engineering. In this study, first, a series of uniaxial compression tests were performed on granite specimens that contain multiple small holes to investigate the effect of the geometry of pre‐existing holes on the strength and fracture behaviours of rock. The crack initiation, propagation and coalescence process, and acoustic emission (AE) characteristics were investigated using photographic and AE monitoring. Three failure modes were identified, ie, splitting failure, stepped path failure, and planar failure modes. Second, a set of micromechanical parameters in the PFC3D model were calibrated by comparison with the experimental results of an intact granite specimen. The numerically simulated peak strength, peak strain, and failure mode of preholed specimens were consistent with the experimental results. In accordance with the numerical results, the failure modes of the preholed specimens were dependent on the bridge angle and number of holes. Last, the internal fracture characteristics of numerical specimens were revealed by analyzing the horizontal and vertical cross sections at different positions.

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“…In terms of the continuum-based methods, finite element method (FEM), 16,17 finite difference method (FDM), 18 boundary element method (BEM), 19 extended finite element method (XFEM), [20][21][22] phantom node method, 23 strain softening elements, 24 and specific meshfree methods, [25][26][27] such as bond particle method (BPM), 28,29 peridynamics (PD), 30-33 smoothed particle hydrodynamics (SPH), 34 and general particle dynamics (GPD), 35,36 were developed to investigate interlayers and crack problems. In terms of the discontinuum-based methods, distinct lattice spring model (DLSM), 37 discrete element method (DEM), [38][39][40][41][42] discontinuous deformation analysis (DDA), [43][44][45] and numerical manifold method (NMM) [46][47][48] were developed.…”

Section: Introductionmentioning

confidence: 99%

Simulation of cracking behaviours in interlayered rocks with flaws subjected to tension using a phase‐field method

Zhou

Jia

Berto

2019

Fatigue Fract Eng Mat Struct

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A phase‐field method (PFM) is used to investigate cracking behaviours, including crack initiation and propagation, in interlayered rocks with preexisting flaws subjected to tension. An example with a bi‐material plate with a centre flaw is used to validate the PFM. Then, numerical simulations of cracking behaviours in interlayered rocks with a single flaw and a cross‐flaw are carried out using PFM. Moreover, the load‐displacement responses are numerically investigated. The PFM numerical results show that the crack propagation trajectories and peak loads of rock specimens depend on the preexisting flaw configuration and the mechanical properties of the interlayers.

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Investigation on Mechanical Behaviors of Sandstone with Two Preexisting Flaws under Triaxial Compression

Cited by 157 publications

References 38 publications

Crack Initiation, Propagation, and Failure Characteristics of Jointed Rock or Rock-Like Specimens: A Review

Crack Initiation, Propagation, and Failure Characteristics of Jointed Rock or Rock-Like Specimens: A Review

Cracking process of a granite specimen that contains multiple pre‐existing holes under uniaxial compression

Simulation of cracking behaviours in interlayered rocks with flaws subjected to tension using a phase‐field method

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