A modified G criterion considering T-stress and differentiating the separation and shear failure in crack propagation

Shen, Zhen; Yu, Hongjun; Guo, Licheng; Hao, Liulei

doi:10.1016/j.ijsolstr.2021.111357

Cited by 6 publications

(2 citation statements)

References 61 publications

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“…For example, Li et al [22] derived analytical formulas for T stress in edge-cracked Brazilian disc (ECBD) specimens under distributed loads and found that its influence should be considered for larger crack angles. Shen et al [23] modified the traditional G criterion, considering the influence of T stress on crack propagation. Tang et al considered the influence of T stress and established the maximum tangential stress (MTS) criterion that simultaneously considers rock properties, crack parameters, strength, and deformation parameters, predicting Type I-II composite stress intensity factors [24].…”

Section: Introductionmentioning

confidence: 99%

Study on Composite Fracture Characteristics and Hydraulic Fracturing Behavior of Hard Rock

Tang,

Wan,

et al. 2024

Applied Sciences

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To investigate the influence of non-singular terms (T stress) in the stress field on the composite fractures of hard rock Type I–II, such as rock splitting failure and hydraulic fracture propagation, this study focused on hard rocks in metallic mines. Through splitting tests and hydraulic fracturing experiments, the impact of T stress on the characteristics of Type I–II composite fractures in hard rocks was analyzed. Utilizing the generalized maximum tangential (GMTS) stress criterion considering T stress, the stress intensity factors of hard rock Type I–II composite fractures with different pre-existing crack angles were predicted. The critical fracture pressure expression for hard rocks was derived based on the maximum tangential stress (MTS) criterion. The results indicate that the GMTS criterion, considering T stress, is more suitable for describing the characteristics of Type I–II composite fractures under rock-splitting loads. However, under hydraulic fracturing, T stress has a minor influence on the fracture characteristics of hard rock hydraulic fractures. Therefore, when predicting the critical fracture pressure of hydraulic fractures, T stress can be disregarded. This study provides a scientific basis and guidance for hard rock hydraulic fracturing engineering.

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Section: Introductionmentioning

confidence: 99%

Study on Composite Fracture Characteristics and Hydraulic Fracturing Behavior of Hard Rock

Tang,

Wan,

et al. 2024

Applied Sciences

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“…The above-mentioned scholars are mainly dedicated to the steady-state or transient thermal fracture problem, while the investigation of the heat fracture problem of multiple cracks in nonhomogeneous material under thermal shock load is seldom carried out. Considering the crack propagation behavior, Zheng et al [14] theoretically investigated the altered G criterion by studying the critical volume to fracture process zone, deformation energy release rate ratio, and T-stress. Turis et al [15] evaluated the dynamic stress intensity factors under stock loading and compared them with a numerical simulation.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Thermal Fracture for Nonhomogeneous Materials Plate with Multiple Cracks

Sun

Zhang

et al. 2022

J. Phys.: Conf. Ser.

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In this paper, the transient interaction integral method (IEIM) is established to obtain the transient thermal stress intensity factors (TSIFs) in order to study the fracture problems of nonhomogeneous materials under thermal shock loading. The transient temperature field is evaluated by using the finite difference method and the finite element method. The TSIFs of nonhomogeneous materials with multiple cracks are analysed, then the mixed-mode TSIFs of nonhomogeneous materials with different positions are discussed. The results of this study have shown that the current approach is applicable to obtain fracture parameters of nonhomogeneous materials with multiple cracks efficiently, which can be used as a significant reference for the engineering application of nonhomogeneous materials.

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Review of Fracture Test Methods

Zhao,

Zheng,

Wang

2024

Rock Fracture Mechanics and Fracture Criteria

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A modified G criterion considering T-stress and differentiating the separation and shear failure in crack propagation

Cited by 6 publications

References 61 publications

Study on Composite Fracture Characteristics and Hydraulic Fracturing Behavior of Hard Rock

Study on Composite Fracture Characteristics and Hydraulic Fracturing Behavior of Hard Rock

Analysis of Thermal Fracture for Nonhomogeneous Materials Plate with Multiple Cracks

Review of Fracture Test Methods

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