Mechanical properties and failure characteristics of anisotropic shale with circular hole under combined dynamic and static loading

Liu, Huilin; Feng, Xianhui; Liu, Liyuan; Li, Tianjiao; Tang, Chun’an

doi:10.1016/j.ijrmms.2023.105524

Cited by 13 publications

(1 citation statement)

References 41 publications

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“…Ye et al [21], Li et al [22], and Du et al [23] thoroughly investigated the mechanical behavior and deformation characteristics of rocks under combined dynamic and static conditions. Liu et al [24] conducted SHPB tests on shale specimens with circular holes using a combined dynamic and static SHPB device and concluded that the main factor causing initial crack formation is the stress concentration caused by the circular holes. Liu et al [25] analyzed the energy mechanism of postpeak fractured sandstone under axial compression and found that the energy absorption per unit volume of postpeak fractured sandstone follows a linear functional distribution with an increase in axial static load.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Dynamic and Static Combined Dynamics of Temperature–Water-Coupled Sandstone and Energy Consumption Analysis

Ping,

Hu,

et al. 2024

Applied Sciences

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In order to study the dynamic properties of temperature–water-coupled sandstone under axial pressure, impact compression tests were carried out on sandstone samples after temperature–water coupling under eight types of axial pressure (0.5~4.0 MPa) loading as well as no axial pressure loading by using the split-Hopkinson pressure bar (SHPB) test set. The results showed that the mass, volume, and density of the sandstone specimens increased by 0.57%, 0.37%, and 0.20%, respectively, after temperature–water coupling. With increasing axial pressure, the dynamic compressive strength of temperature–water-coupled sandstone samples decreased as a linear function, the dynamic strain increased as a quadratic function, the dynamic modulus of elasticity decreased as a quadratic function, and the average strain rate increased as an exponential function, indicating a strong strain rate effect. From the energy point of view, as the axial pressure increases, the absorption energy of the sample increases, the reflection energy gradually decreases, the crushing degree of the sample increases, and the size of the broken pieces decreases; the average particle size of the sandstone sample pieces decreases quadratically with the increase in the absorption energy and linearly with the increase in the axial pressure.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Dynamic and Static Combined Dynamics of Temperature–Water-Coupled Sandstone and Energy Consumption Analysis

Ping,

Hu,

et al. 2024

Applied Sciences

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Study of the Dynamic Failure Characteristics of Anisotropic Shales Under Impact Brazilian Splitting

Feng,

Gong,

Liang

et al. 2023

Rock Mech Rock Eng

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The mechanical behaviors of shales with transversely isotropic characteristics under dynamic loading have great significance for structural instability in geotechnical engineering. To understand the effect of transverse isotropy on the deformability and tensile strength of shales subjected to dynamic loading, a group of impact Brazilian tests were carried out on shale specimens via a split Hopkinson pressure bar (SHPB) testing system. High-speed digital image correlation technology was applied to monitor the fracture process. The experimental results demonstrate that the failure strength has considerable anisotropy as the bedding angle of the embedded layers changes. Moreover, the tensile strength of shales with vertical bedding is usually higher than that of shales with parallel bedding. The observed failure mode is mainly the interaction between tensile and/or shear fractures, and with increasing loading rate, layer-activated fractures tend to occur. Furthermore, five typical failure patterns of transversely isotropic shales characterized by different mechanisms under dynamic Brazilian testing were found. The shales were sensitive to the strain rate when the deformation and fracture response under dynamic loading were assessed. In addition, the modified Nova‒Zaninetti criterion that considers the strain rate effect was proposed according to the Brazilian splitting data and dynamic coordinate system. The established criterion not only properly represents the law of dynamic strength but also provides a new understanding of the effect of strain rate on strength. It has proven to be effective for predicting the dynamic strength characteristics of shales.

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Effects of bedding plane properties on mechanical, acoustic emission and micro failure characteristics of bedded rock mass

Liu,

Meng,

Jing

et al. 2024

Bull Eng Geol Environ

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Mechanical properties and failure characteristics of anisotropic shale with circular hole under combined dynamic and static loading

Cited by 13 publications

References 41 publications

Experimental Study on Dynamic and Static Combined Dynamics of Temperature–Water-Coupled Sandstone and Energy Consumption Analysis

Experimental Study on Dynamic and Static Combined Dynamics of Temperature–Water-Coupled Sandstone and Energy Consumption Analysis

Study of the Dynamic Failure Characteristics of Anisotropic Shales Under Impact Brazilian Splitting

Effects of bedding plane properties on mechanical, acoustic emission and micro failure characteristics of bedded rock mass

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