On tensile fracture of a brittle rock

Asem, Pouyan; Wang, Xiaoran; Hu, Chen; Labuz, Joseph F.

doi:10.1016/j.ijrmms.2021.104823

Cited by 18 publications

(5 citation statements)

References 11 publications

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“…The measurements indicate that the length of the FPZ derived from the AE location analysis is about 1.5 mm larger than the size identified from the DIC displacement and strain contours. Similarity, in the study of Asem et al, 41 compared with the crack tip location obtained from DIC results, there was also an error of 1.5 mm in the location of AE events. Wang et al 42 used AE events with the error within 2 mm to characterize the evolution of the fracture process.…”

Section: Discussionsupporting

confidence: 85%

Experimental study on cracking process and fracture properties of granite under mode I loading by acoustic emission and digital image correlation

Xue

Lin

Wang

2023

Fatigue Fract Eng Mat Struct

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To explore mode‐I fracture process of hard brittle rocks, semi‐circular bending (SCB) experiments were performed with the concurrent monitoring of acoustic emission (AE) and digital image correlation (DIC). Experimental results revealed that all specimens exhibited ductile fracture characteristic and the fracture planes deviated from the ligament plane to different degrees due to interference from mineral crystals or pre‐existing weak surfaces within the intergranular boundaries. The whole cracking process can be divided into four stages: Microcrack initiation preparation, microcrack initiation and stable propagation, macrocrack formation and unstable propagation, and macrocrack coalescence. The onset of the microcrack initiation occurred at about pre‐80% load. The fracture process zone (FPZ) maintained a constant length as the crack propagated and the length of the traction free zone (TFZ) increased. The identified crack lengths based on the AE locations and energy statistical analysis consisted well with the crack lengths obtained from the DIC.

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Section: Discussionsupporting

confidence: 85%

Experimental study on cracking process and fracture properties of granite under mode I loading by acoustic emission and digital image correlation

Xue

Lin

Wang

2023

Fatigue Fract Eng Mat Struct

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“…Elastic Modulus (GPa) Elastic Modulus (GPa) Chen and Stimpson [99] conducted a numerical study to characterize the correlation between the elastic modulus in tension and compression. Asem et al [100] computed the tensile elastic modulus using the experimental data from a four-point bending test. The modulus is given by…”

Section: Elastic Modulusmentioning

confidence: 99%

“…When bending is symmetrical with respect to the neutral axis of the cross-section, E t = E eq . The ratio of the tension to the compression modulus is represented by the Poisson's ratio and crack density [100]. It is given by…”

Section: Elastic Modulusmentioning

confidence: 99%

Characterizing Tensile Strength of Building Sandstone via Uniaxial Tensile, Compressive, and Flexural Bending Tests

Guan

Huang

et al. 2023

Materials

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Sandstone is widely used a construction and building material. However, its uniaxial tensile strength (UTS) is not adequately understood. To characterize the uniaxial tensile strength of natural sandstone, three groups of specimens were fabricated for four-point bending, uniaxial compressive, and tensile tests. To characterize the evolution of the stress–strain profiles obtained via these tests, representative expressions were developed in terms of normalized strain and strength. The magnitude of the uniaxial tensile strength exceeded that of the four-point bending strength, indicating that the uniaxial tensile strength cannot be represented by the four-point bending strength. The experimental ratio of uniaxial tensile and compression strength (33–41) was underestimated by the empirical expressions reported in the literature. The suggested correction coefficient for the FBS is 0.25. The compressive modulus (Ec) was generally identical to the experimental results published in the literature, whereas the tensile modulus (Et) was overestimated. The experimental modular ratio, Et/Ec, ranged from 0.12 to 0.14; it was not sensitive to Poisson’s ratio, but it increased slightly with the compressive modulus. This work can serve as a reference for computing the load-bearing capacity of sandstone components under tension.

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“…Rock material is brittle [1], and its tensile and compression properties are very different. The failure mode varies, and the tensile strength of rock is always less than the compressive strength.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Experimental Study of the Deformation and Failure of Granite with Multiaxial Tension

Zhou

Xie

et al. 2022

Processes

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A numerical simulation method is proposed to study the deformation and failure rule of granite with multi-directional tensile stress, based on the importance of the rock tension. This investigation took into consideration the fact that the current experimental equipment cannot complete multi-directional tension experiments for rock. The deformation and failure rule of the granite material model with biaxial and triaxial tensile stress are studied using the numerical simulation software CASRock. The results show that in a biaxial tensile stress state, the tensile strength of granite decreases with the increase in the confining pressure, but the influence of the compression confining pressure on the strength reduction is greater than the tensile confining pressure. The number of cracks generated during failure decreases with the increase in the compressive confining pressure, and the inclination angle of the failure surface increases with the increase in the compressive confining pressure. In the three-direction tension stress state, the tensile strength of granite decreases slightly with the increase in the compressive confining pressure. However, when the compressive confining pressure in one direction is close to the uniaxial tensile strength, the tensile strength of granite will decrease quickly, and the failure result is similar to that of the uniaxial tensile failure.

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On tensile fracture of a brittle rock

Cited by 18 publications

References 11 publications

Experimental study on cracking process and fracture properties of granite under mode I loading by acoustic emission and digital image correlation

Experimental study on cracking process and fracture properties of granite under mode I loading by acoustic emission and digital image correlation

Characterizing Tensile Strength of Building Sandstone via Uniaxial Tensile, Compressive, and Flexural Bending Tests

Numerical Simulation Experimental Study of the Deformation and Failure of Granite with Multiaxial Tension

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