Mechanical behavior of rock-like jointed blocks with multi-non-persistent joints under uniaxial loading: A particle mechanics approach

Fan, Xiang; Kulatilake, Pinnaduwa H.S.W.; Chen, Xin

doi:10.1016/j.enggeo.2015.02.008

Cited by 150 publications

(44 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considering these inherent advantages of simulating the fracturing process in rock or rock-like materials, Particle Flow Code (PFC) was used to explore the rupture mechanism of rock-like specimens with joints in shearing. e parallel-bonded particle model (PBPM) was employed in this study, which has been extensively used and validated in simulating the fracturing process of rock or rock-like materials in a ood of literature reviews [5,16,22,28,29]. Since the microproperties of the real physical material are not determined directly in the laboratory, calibrating the PFC synthetic specimen requires an iterative trial-and-error procedure.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…Continuum methods cannot present explicitly the crack initiation, propagation, and nucleation because mesh grids in the problem domain should remain in the same neighborhood during the whole deformation or transport process and thus block rotation so that opening of the mesh will not happen. In contrast, discontinuum methods are able to model zone detachment, large displacements, and block rotation, and therefore, the fracturing process in rock or rock-like materials can be presented explicitly by microcracks formed in models based on the discrete element method (DEM) [5,[27][28][29][30][31][32]. Additionally, based on the rock failure analysis process, the numerical direct shear test was performed to investigate the shear behavior of intermittent joints with different geometrical parameters.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental and Numerical Study of the Failure Behavior of Intermittent Rock Joints Subjected to Direct Shear Load

Fan

Lai

et al. 2018

Advances in Civil Engineering

Self Cite

View full text Add to dashboard Cite

Two series of intermittent rock joints containing three joints arranged along the central shear axis were considered in this study. e failure behavior under direct shear loads was investigated by means of both physical tests and numerical simulations. e cracking behavior was found to be distinctly associated with the joint arrangement. Several types of main and secondary cracks were identified. e variation trends of the crack initiation stress ratio with inclination angle were analyzed and found to be partly different for the two series of intermittent joints. e whole fracturing process was characterized by three phases. Not all samples have to experience all three phases. e second phase is alternative and can be reflected by the shearing curve. Hence, two types of shearing curves, including single and double peaks, were identified. e double peak is due to the extrusion or sawteeth cutting in the second phase. Moreover, the numerical micromechanical analysis was performed to explain the shear behavior using the contact force and microcrack within the specimen. Based on the numerically measured local stresses, maximum and minimum principal stresses around the middle joint at crack initiation stress and peak shear stress were analyzed.

show abstract

Section: Numerical Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of the Failure Behavior of Intermittent Rock Joints Subjected to Direct Shear Load

Fan

Lai

et al. 2018

Advances in Civil Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…To better understand the mechanical behavior of jointed rock or rock-like materials, substantial experimental efforts have been devoted to the study of crack initiation, propagation, and failure modes of precracked rocks or rock-like specimens. Many kinds of joint geometries have been considered in previous works, such as joint inclination angle [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19], joint distance [3,[15][16][17][18], and overlap distance [17][18][19]. At the same time, there are many kinds of materials that have been used by scholars, such as glass [5], Columbia Resin 39 [20], and molded gypsum [15,[21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…Apart from specimens with single, two, or three fissures, the failure pattern of jointed specimen has also been investigated by scholars. The failure patterns of multiplejointed specimen include stepped path failure [3,12,[16][17][18]; shearing failure [3,12]; block rotation failure [18]; and intact failure [3,12,16].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Failure Behavior and Energy Mechanics of Rock-Like Materials Containing Multiple Joints

Cao

Lin

2017

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

This paper investigates the influence of joint geometry parameters on the characteristic stress, failure pattern, and energy mechanism of multiple jointed rock-like specimens under uniaxial compression. Both the laboratory and numerical results show that the higher value of UCS occurs when is around 0 ∘ and changes from 15 ∘ to 30 ∘ or when is around 30 ∘ and changes from 45 ∘ to 75 ∘ . However, the lowest value appears when is around 45 ∘ and changes from 15 ∘ to 30 ∘ . The CDiS (critical dilatancy stress) and CIS (crack initiation stress) show a similar tendency to UCS. Moreover, the specimens present different failure modes for various levels of , , and , and the failure mode can be classified into four categories: stepped path failure; failure through parallel plane; failure through cross plane; material failure. In addition, with higher strength, the input energy and strain energy are higher than those with lower strength. Dissipation energy is affected by the failure modes of the specimens. At the same time, when changes from 0.2 to 0.6, the boundary energy, strain energy, and dissipation energy show a decreasing trend.

show abstract

“…Chen et al [13] studied the in uences of joint inclination angle and joint connectivity rate on compression strength and stress-strain curves of rock mass with nonpersistent open joints by conducting uniaxial compression tests on gypsum specimens. Fan et al [14] performed numerical simulations to study the in uence of multi-nonpersistent joints on mechanical behavior by using PFC3D software package. Yang et al [15] numerically simulated the mechanical behavior of a jointed rock mass with nonpersistent joints adjacent to a free surface on the wall of an excavation.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on Mechanical Behavior of Parallel Joint Specimens under Compression Shear

Wang

Cao

Chen

et al. 2018

Advances in Civil Engineering

View full text Add to dashboard Cite

In order to investigate the influence of the joint on the failure mode, peak shear strength, and shear stress-strain curve of rock mass, the compression shear test loading on the parallel jointed specimens was carried out, and the acoustic emission system was used to monitor the loading process. e joint spacing and joint overlap were varied to alter the relative positions of parallel joints in geometry. Under compression-shear loading, the failure mode of the joint specimen can be classified into four types: coplanar shear failure, shear failure along the joint plane, shear failure along the shear stress plane, and similar integrity shear failure. e joint dip angle has a decisive effect on the failure mode of the specimen. e joint overlap affects the crack development of the specimen but does not change the failure mode of the specimen. e joint spacing can change the failure mode of the specimen. e shear strength of the specimen firstly increases and then decreases with the increase of the dip angle and reaches the maximum at 45°. e shear strength decreases with the increase of the joint overlap and increases with the increase of the joint spacing. e shear stress-displacement curves of different joint inclination samples have differences which mainly reflect in the postrupture stage. From monitoring results of the AE system, the variation regular of the AE count corresponds to the failure mode, and the peak value of the AE count decreases with the increase of joint overlap and increases with the increase of joint spacing.

show abstract

Mechanical behavior of rock-like jointed blocks with multi-non-persistent joints under uniaxial loading: A particle mechanics approach

Cited by 150 publications

References 23 publications

Experimental and Numerical Study of the Failure Behavior of Intermittent Rock Joints Subjected to Direct Shear Load

Experimental and Numerical Study of the Failure Behavior of Intermittent Rock Joints Subjected to Direct Shear Load

Experimental and Numerical Study of Failure Behavior and Energy Mechanics of Rock-Like Materials Containing Multiple Joints

An Experimental Study on Mechanical Behavior of Parallel Joint Specimens under Compression Shear

Contact Info

Product

Resources

About