Experimental and Numerical Study into 3D Crack Growth from a Spherical Pore in Biaxial Compression

Wang, Hongyu; Dyskin, Arcady; Pasternak, Elena; Dight, Phil; Sarmadivaleh, Mohammad

doi:10.1007/s00603-019-01899-1

Cited by 39 publications

(12 citation statements)

References 43 publications

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“…In order to observe the growth of 3D crack intuitively, Li et al conducted research on 3D crack through CT scanning technology [17]. Further, some scholars observed the growth phenomenon of 3D crack during the biaxial loading process, and they found that lateral load had a significant influence on the growth of 3D crack [18][19][20][21][22]. Some numerical simulation results were also reported, which is consistent with the previous experimental results [23,24].…”

Section: Introductionsupporting

confidence: 60%

Research on the Behavior and Mechanism of Three‐Dimensional Crack Growth under Uniaxial Loading

Zhang

Qin

2021

Advances in Materials Science and Engineering

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Most of the cracks in the rock masses are in a three-dimensional (3D) state, and it is always a hot topic to reveal the mechanical mechanism of 3D crack growth. In this paper, the research on the growth behavior of 3D crack is performed through laboratory experiments and numerical simulations. Cement samples with different angles of 3D crack are prepared, and the uniaxial compression experiment is carried out. The results indicate that initiation of preexisting crack with an angle of 45° is easier and shear failure characteristics of corresponding samples are obvious. Through theoretical analysis, the preexisting crack starts to grow at the end of the short axis, along the short axis end to the long axis end of the preexisting crack, the shear effect decreases gradually, and the tearing effect increases gradually. Combined with numerical simulation, the experimental and analysis results are verified, and the preexisting crack growth process is presented. The growth direction of the preexisting crack changes from perpendicular to the crack surface to parallel principal stress direction, and the maximum growth length can reach 1.2 times the minor axis radius of the preexisting crack. The research results can provide an important theoretical basis for revealing the evolution process of the cracks in rock masses.

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Section: Introductionsupporting

confidence: 60%

Research on the Behavior and Mechanism of Three‐Dimensional Crack Growth under Uniaxial Loading

Zhang

Qin

2021

Advances in Materials Science and Engineering

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“…62 The initial cracks in the actual rock were open, which could influence the system response and deformation behavior of the rock samples under ultrasonic vibration. 23,63 It was difficult to faithfully replicate the features of the cracks in the FJM. It would be interesting to simulate a more realistic behavior of cracks, and this would constitute our future work.…”

Section: Resultsmentioning

confidence: 99%

“…These differences were possibly owing to the difference between the FJM and the actual rock 62 . The initial cracks in the actual rock were open, which could influence the system response and deformation behavior of the rock samples under ultrasonic vibration 23,63 . It was difficult to faithfully replicate the features of the cracks in the FJM.…”

Section: Analysis Of Simulation Resultsmentioning

confidence: 99%

Discrete element simulation for investigating fragmentation mechanism of hard rock under ultrasonic vibration loading

Tang

Zhao

Zhou

et al. 2020

Energy Science & Engineering

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With the gradual depletion of shallow resources, the energy exploration depth has been increasing and condition becomes complex. 1 Consequently, the explorations face increasingly harder rocks with higher strengths. Breaking hard rock rapidly in petroleum and mineral exploration is a popular and significant topic. 2-6 However, the current technologies cannot meet the demands of quick drilling. It is necessary to develop a more efficient technology for hard rock exploration. To achieve this goal, the assisted ultrasonic vibration technique (ultra-high-frequency cyclic loading), combined with the traditional drilling method, was first introduced by researchers at Aberdeen University. 7 To implement this technology more effectively, studies were conducted on rock-breaking characteristics under ultrasonic vibrations and optimization of the vibration parameters. The studies conducted by Wiercigroch et al 8 showed that the high-frequency axial vibration significantly enhanced the breaking rates compared to the traditional method. Subsequently, uniaxial compressive strength experiments were conducted on fine granite by Yin et al 9 to demonstrate that there exists a static force threshold for this technology. They found that the optimal value range of static loading was 200-300 N. An

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“…Sulige gas field is located in the northwestern part of Ordos basin in China, and the tectonic is simple, which is a west-dipping monoclinal structure with an inclination of 1 degree (Figure 1(a)). The main producing formations in the Ordos basin include the Lower Shihezi group and Shanxi group of the Permian system [24][25][26][27]. Their porosity ranges from 4.11% to 15.19%, with an average of 8.76%; their permeability ranges from 0.17 to 6.88 mD, with an average of 0.46 mD, which indicates that the reservoir is a typical tight sandstone gas reservoir [28].…”

Section: Methodsmentioning

confidence: 99%

Insight into the Pore Structures and Its Impacts on Movable Fluid in Tight Sandstones

Ren

Yang

et al. 2020

Geofluids

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Both the characteristics of pore structure and movable fluid are significant properties in controlling the flow regularity in pores in tight sandstones. However, the governing factors that affect the fluid flow features will still be a myth. In our research, the western area of the Sulige gas field was chosen as the research region, and various kinds of experiments were conducted. Three reservoir groups, including intergranular-dissolved pore type, dissolved-intercrystalline pore type, and pore plus microcracks type were identified on the basis of pore development features. The results suggest that the intergranular-dissolved pore type has a more prominent influence on the high movable fluid saturation and larger pores. Both large throat sizes and homogeneous pore-throat degree demonstrate high movable fluid saturation. The increment of the thickness of water-film resulted from hydrophilic enhancement, indicating that an increased hydrophilic will decrease the movable fluid saturation and block the throats. The reservoirs of different pore combination types are closely related to the gas content of the reservoir.

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Experimental and Numerical Study into 3D Crack Growth from a Spherical Pore in Biaxial Compression

Cited by 39 publications

References 43 publications

Research on the Behavior and Mechanism of Three‐Dimensional Crack Growth under Uniaxial Loading

Research on the Behavior and Mechanism of Three‐Dimensional Crack Growth under Uniaxial Loading

Discrete element simulation for investigating fragmentation mechanism of hard rock under ultrasonic vibration loading

Insight into the Pore Structures and Its Impacts on Movable Fluid in Tight Sandstones

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