Brittle fracture of rock under combined tensile and compressive loading conditions

Tang, Shibin; Bao, Chunyan; Liu, Hongyuan

doi:10.1139/cgj-2016-0214

Cited by 27 publications

(12 citation statements)

References 75 publications

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“…where σ θθ is the tangential stress at the flaw tip and σ c is the critical value of the tangential stress. The analysis results can well reflect the differences of fracture types of cracks under the action of tension and compression, and the results obtained are in good agreement with the experimental results, which makes it widely used in the theoretical research and practical engineering of rock failure [25][26][27][28].…”

Section: Theoretical Achievements Onsupporting

confidence: 69%

Fracture Behavior of Rock with Initial Damage: Theoretical, Experimental, and Numerical Investigations

et al. 2020

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Geomaterials such as rock mass often have initial damage under the influence of long-term geological action and hydration corrosion environment. The initial damage affects the integrity and stability of the rock mass, resulting in a difference in the mechanical properties of jointed rock mass and intact one. Therefore, the study of the fracture and failure characteristics of the jointed rock mass is of great significance. Most of the previous researches into the fracture behavior of rock with initial damage are based on model testing, theoretical analysis, and numerical simulation of rock mass with preexisting flaws. This review concentrates on the theoretical, experimental, and numerical efforts that have been devoted to the fracture characteristics of rock or rock-like specimens with preexisting flaws under compression. Some suggestions on the future research work in this field are also given.

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Section: Theoretical Achievements Onsupporting

confidence: 69%

Fracture Behavior of Rock with Initial Damage: Theoretical, Experimental, and Numerical Investigations

et al. 2020

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“…ere are many factors leading to the formation of different types of strain rock burst. However, no matter how complex its internal mechanism is, rock burst is mainly controlled by two factors, namely lithological conditions and stress field conditions [9][10][11][12][13]. It is found that the deep rock mass is mostly hard brittle rock mass, which generally meets the requirements of lithological conditions when rock burst occurs.…”

Section: Influencing Factors Of Tunnel Surrounding Rock Failurementioning

confidence: 99%

Study on the Failure Mechanism of Strain Rockburst

Zhou

Wang

et al. 2022

Shock and Vibration

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Among the factors affecting rock mass failure, the stress state has the greatest influence on the mechanical behavior of rock. The mechanical behavior of rock depends on the change of stress path, and the stress of rock mass is closely related to deformation and failure. In order to study the influence of surrounding rock stress state on the failure mode of surrounding rock, based on the theory of elastic mechanics and fracture mechanics, this paper analyzed the stress state of surrounding rock element and crack propagation of surrounding rock, and estimated the potential failure mode of surrounding rock in different areas of a phosphate mine in Yichang. The results showed that: the surrounding rock element is affected by the gradient stress, and a larger stress gradient corresponds to a larger principal stress ratio and variation direction of the surrounding rock. The failure mode of surrounding rock is affected by the coupling effect of principal stress ratio and principal stress direction. Under the action of certain crack angle and appropriate confining pressure, different fracture mechanisms may occur in the surrounding rock compression. But the partition of surrounding rock failure mode region can predict the surrounding rock failure mode to a certain extent.

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“…Therefore, for interface cracks in rock joints, a mode II fracture often occurs, which is different from traditional rock fracture mechanics, where a mode I fracture more commonly occurs and the initiation angle is about 70.5° [ 43 ].…”

Section: Initiation Of Interface Crackmentioning

confidence: 99%

Study on the Initiation of Interface Crack in Rock Joints

Chen

Gao

et al. 2022

Materials

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The interfacial fracture of rock joints is an important although easily ignored issue in jointed rock engineering. To conduct this study, an interface crack model of rock joints was proposed. By analyzing the ratio of stress intensity factor to fracture toughness, the fracture mode of the interface crack was studied. Based on the Mohr-Coulomb criterion, an interface fracture criterion considering T-stress was established. To verify the proposed fracture criterion, laboratory and numerical tests were conducted. Finally, the effect of relative critical size α, internal friction angle φ and cohesion c on the initiation of an interface crack was comprehensively discussed. It is concluded that the proposed fracture criterion can predit the initiation of the interface cracks properly. With an increase in cohesion c, mode II fracture toughness KIIC also clearly increases. When the absolute value of KI is small, the effect of α is much larger than that of φ. In addition, with an increase in the absolute value of the mode I stress intensity factor, the φ of the joint plays a more important role in the initiation of the interface crack.

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Brittle fracture of rock under combined tensile and compressive loading conditions

Cited by 27 publications

References 75 publications

Fracture Behavior of Rock with Initial Damage: Theoretical, Experimental, and Numerical Investigations

Fracture Behavior of Rock with Initial Damage: Theoretical, Experimental, and Numerical Investigations

Study on the Failure Mechanism of Strain Rockburst

Study on the Initiation of Interface Crack in Rock Joints

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