Experimental and Numerical Research on 3D Crack Growth in Rocklike Material Subjected to Uniaxial Tension

Yang, Lei; Jiang, Yujing; Li, Shucai; Li, Bo

doi:10.1061/(asce)gt.1943-5606.0000917

Cited by 41 publications

(14 citation statements)

References 29 publications

(23 reference statements)

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“…Using PFC 2D software, Yang and Huang carried out the Brazilian splitting test for the jointed rock specimen, and the effects of joint angle and notch angle on the tensile strength and failure mode of jointed rock specimens were detailed analyzed [16]. Yang et al studied the growth mechanism of three-dimensional (3D) cracks in rocks under tension as well as the strength and failure behavior of samples [17]. Morgan et al studied the cracking processes in Barre granite, including the fracture process zones and crack coalescence [18].…”

Section: Introductionmentioning

confidence: 99%

Simulation Study on Strength and Failure Characteristics for Granite with a Set of Cross‐Joints of Different Lengths

Yin

Chen

Liu

et al. 2018

Advances in Civil Engineering

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e strength and failure characteristics for granite specimen with a set of cross-joints of different lengths were studied using PFC 2D software. e results show that when the included angle of α between the main joint and loading direction is 30°or 45°, no matter what the included angle of β between main and secondary joints is, the main joint controls crack propagation and failure of granite specimen, which occurs the shear failure propagating from main joint tips, and the corresponding uniaxial compressive strength is low. Meanwhile, the secondary joint is the key joint for crack propagation and failure at α of 0°and 90°except when β is 90°. e granite specimen occurs the shear failure propagating from secondary joint tips. And, the shear failure crossing upper tips of main and secondary joints is found at α of 0°or 90°and β of 90°. eir uniaxial compressive strengths are large. Also, the combined actions of main and secondary joints determine crack propagation and failure at α of 60°except when β is 90°. e granite specimen occurs the hybrid failure, including shear failure propagating from main joint tips and tensile failure propagating from main and secondary joints center or secondary joint tips. And, when α is 60°and β is 90°, the granite specimen occurs the shear failure along secondary joint plane direction, and its uniaxial compressive strength is small. Generally, when α or β is a fixed value, the uniaxial compressive strength firstly decreases and then increases with the increase of β or α. Additionally, when α is 60°and β > 45°, the uniaxial compressive strength represents a decreasing trend. e uniaxial compressive strength at α and β between 30°a nd 60°is generally small. Finally, the microdisplacement field distributions of granite specimen were discussed.

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Section: Introductionmentioning

confidence: 99%

Simulation Study on Strength and Failure Characteristics for Granite with a Set of Cross‐Joints of Different Lengths

Yin

Chen

Liu

et al. 2018

Advances in Civil Engineering

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“…Hydraulic fracturing has been widely implemented for the exploitation of oil, gas, and geothermal resources (Hubbert and Willis 1957;Warpinski et al 2009;Beckwith 2010). The current numerical simulations mainly focused on the propagation of single fractures (Paris and Erdogan 1963;Hoek and Bieniawski 1965;Germanovich et al 1994;Olson 2004;Yang et al 2013) and several fractures (Bobet and Einstein 1998;Sagong and Bobet 2002;Yang et al 2012;Li J et al 2013), yet investigating the hydraulic fracturing behavior of complex fracture networks is still a great challenge because of the complex rock-fluid mechanisms involved and the time-consuming computation (Zhao et al 2014b). At high hydraulic gradient, the competitive roles of inertial effects that tend to decrease the permeability, and hydraulic fracturing that tends to increase the permeability, need to be quantitatively estimated via laboratory experiments and/ or numerical simulations.…”

Section: Concluding Remarks and Future Workmentioning

confidence: 99%

Review: Mathematical expressions for estimating equivalent permeability of rock fracture networks

et al. 2016

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Fracture networks play a more significant role in conducting fluid flow and solute transport in fractured rock masses, comparing with that of the rock matrix. Accurate estimation of the permeability of fracture networks would help researchers and engineers better assess the performance of projects associated with fluid flow in fractured rock masses. This study provides a review of previous works that have focused on the estimation of equivalent permeability of twodimensional (2-D) discrete fracture networks (DFNs) considering the influences of geometric properties of fractured rock masses. Mathematical expressions for the effects of nine important parameters that significantly impact on the equivalent permeability of DFNs are summarized, including (1) fracturelength distribution, (2) aperture distribution, (3) fracture surface roughness, (4) fracture dead-end, (5) number of intersections, (6) hydraulic gradient, (7) boundary stress, (8) anisotropy, and (9) scale. Recent developments of 3-D fracture networks are briefly reviewed to underline the importance of utilizing 3-D models in future research.

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“…But, there are few people who used this method to investigate the failure behavior of jointed rocks or rock-like materials. Yang et al [123] conducted uniaxial tension experiments on precracked rocklike specimens (Figure 18); the strength and failure behavior of specimen have been analyzed and discussed. e results indicated that crack geometry parameters including crack dip angle, crack spacing, and crack intensity, have significant influence on the strength and failure modes of the samples.…”

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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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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Experimental and Numerical Research on 3D Crack Growth in Rocklike Material Subjected to Uniaxial Tension

Cited by 41 publications

References 29 publications

Simulation Study on Strength and Failure Characteristics for Granite with a Set of Cross‐Joints of Different Lengths

Simulation Study on Strength and Failure Characteristics for Granite with a Set of Cross‐Joints of Different Lengths

Review: Mathematical expressions for estimating equivalent permeability of rock fracture networks

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

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