An Experimental Investigation of the Influence of Loading Rate on Rock Tensile Strength and Split Fracture Surface Morphology

Cui, Zhen; Sheng, Qian; Zhang, Guimin; Zhang, Maochu

doi:10.1007/s00603-021-02368-4

Cited by 41 publications

(10 citation statements)

References 18 publications

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“…Besides, the correlation shown in Figure 9 agrees with previous experimental results under different loading conditions, for example, the Brazilian splitting test by Cui et al. (2021) shows that a linear relationship exists between the tensile strength and the roughness of the failure surface.…”

Section: Rate Effect On Shear Strength and Failure Surface Morphologysupporting

confidence: 89%

“…This mechanism was discussed by Zhang et al (1999) through a quantitative investigation of energy consumption and partitioning in Mode I fractures of rock under static and dynamic loadings, and supported by the morphological data here. Besides, the correlation shown in Figure 9 agrees with previous experimental results under different loading conditions, for example, the Brazilian splitting test by Cui et al (2021) shows that a linear relationship exists between the tensile strength and the roughness of the failure surface.…”

Section: Rate Effect On Shear Strength and Failure Surface Morphologysupporting

confidence: 89%

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Rate Effect on the Direct Shear Behavior of Granite Rock Bridges at Low to Subseismic Shear Rates

Luo

Zheng

2022

JGR Solid Earth

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Lithological, mechanical, and frictional heterogeneity within the fault zone occurs over many different scales and exerts an important control over fault strength, slip stability and earthquake nucleation (Barnes et al., 2020;Faulkner et al., 2010;Tesei et al., 2014). To define the effect of fault heterogeneity, a detailed understanding of the rupture propagation along heterogeneous faults is required. Laboratory experiments approach the problem by using gouge materials with varying friction strength to simulate heterogeneous faults (Bedford et al., 2022;Buijze et al., 2021). Recent laboratory experiments and field observations note that, as well as frictional strength evolution, faults also recover cohesion through processes such as pressure solution during interseismic periods

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Section: Rate Effect On Shear Strength and Failure Surface Morphologysupporting

confidence: 89%

Section: Rate Effect On Shear Strength and Failure Surface Morphologysupporting

confidence: 89%

Rate Effect on the Direct Shear Behavior of Granite Rock Bridges at Low to Subseismic Shear Rates

Luo

Zheng

2022

JGR Solid Earth

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“…In order to facilitate the subsequent calculation of the thermal conductivity of coal-rock mass, this paper uses a cone to describe the morphology of the roughness element. [21][22][23] The outermost pore surface roughness element area is collectively referred to as the solid-liquid interface layer, the middle layer is the water layer, and the innermost layer is the air layer.…”

Section: Equivalent Physical Model Of Coal-rock Massmentioning

confidence: 99%

Implementation and validation of effective thermal conductivity model of coal‐rock mass with rough capillary pore structure under CT three‐dimensional reconstruction

Zhao,

Tu,

Liu

et al. 2023

Num Anal Meth Geomechanics

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On the strength of the capillary physical equivalent model and heat transfer law of series‐parallel combined structural unit, the calculation model of effective thermal conductivity of coal‐rock mass is obtained. The model considers the effect of roughness, porosity factor and other factors on effective thermal conductivity. CT digital core technology is applied to reconstruct the 3D model of coal‐rock mass, and one‐way heat transfer numerical simulation is carried out according to the model. It indicates that the internal temperature of coal‐rock mass is non‐uniformly distributed under the influence of pore structure, and the isothermal surface of pore region bulges towards the boundary of heat flux. Comparing the calculated and simulated values under the same conditions, the average error percentage of the theoretical calculation model is 6.95%, and the model has outstanding prediction performance in porous media with medium porosity and regular pore distribution, which provides a reference for predicting the effective thermal conductivity of coal‐rock mass.

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“…The loading rate is a significant parameter that determines mechanical strength and deformation of rock (Gao et al, 2020;Xiong and Chen, 2020;Majedi et al, 2021). Cui et al (2021) studied the influence of loading rate on rock tensile strength and split fracture surface morphology, their test results suggested that the rock tensile strength and roughness indices increase with the loading rate. Wang et al (2021) studied the failure mechanism of fractured rock and associated acoustic behavior under different loading rates.…”

Section: Introductionmentioning

confidence: 99%

The influence of loading rate on the mechanical behavior and energy evolution characteristics of hard and soft rock under triaxial compression

Deng¹,

Chen²,

Wu³

2022

Journal of Theoretical and Applied Mechanics

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To investigate the influence of loading rate and confining pressure on the mechanical behavior and energy evolution characteristics of hard and soft rock, high strength sandstone and low strength granite were subjected to triaxial compression tests with different loading rates. The results show that significant differences exist in the stress-strain curves for sandstone and granite. The confining pressure has a significant effect on the stress-strain curve, while the loading rate has a smaller effect on the stress-strain curve. As the confining pressure increases, the peak axial strain, peak axial stress, total energy, elastic energy and dissipated energy of sandstone and granite increase, the proportion of dissipated energy to total energy of sandstone and the proportion of elastic energy to total energy of granite are reduced. As the loading rate goes up, the peak axial stress, total energy and elastic energy increase in both sandstone and granite. The ultimate failure pattern of sandstone is a typical single inclined plane shear failure, while the ultimate failure pattern of granite consists of a single inclined plane shear failure and a vertical split failure. The loading rate has no significant effect on the macroscopic failure pattern, the elastic and dissipated energies are proportional to the total energy of sandstone and granite.

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An Experimental Investigation of the Influence of Loading Rate on Rock Tensile Strength and Split Fracture Surface Morphology

Cited by 41 publications

References 18 publications

Rate Effect on the Direct Shear Behavior of Granite Rock Bridges at Low to Subseismic Shear Rates

Rate Effect on the Direct Shear Behavior of Granite Rock Bridges at Low to Subseismic Shear Rates

Implementation and validation of effective thermal conductivity model of coal‐rock mass with rough capillary pore structure under CT three‐dimensional reconstruction

The influence of loading rate on the mechanical behavior and energy evolution characteristics of hard and soft rock under triaxial compression

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