Effect of loading characteristics and specimen size in split Hopkinson pressure bar test on high-rate behavior of phyllite

Mishra, SK; Khetwal, Anuradha; Chakraborty, Tanusree; Basu, Dipanjan

doi:10.1007/s43452-022-00534-1

Cited by 10 publications

(3 citation statements)

References 35 publications

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“…Luo et al [24] studied four types of reef limestone and obtained the correlations of physical properties of reef limestone and its dynamic and static parameters. Mishra et al [25] found that the dimensions of phyllite and the split Hopkinson pressure bar (SHPB) loading characteristics had impact on the phyllite response. Han et al [26] found that inclusions embedded in rock materials affected their mechanical response and fracture behavior.…”

Section: Literature Review and Discussionmentioning

confidence: 99%

A Thorough Investigation of the Dynamic Properties of Granite under Cyclic Loading

Ding,

Zhao,

Dong

et al. 2023

Applied Sciences

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We propose a novel inverse analysis method that utilizes shockwaves to detect the operational condition of tested rock. To achieve this back analysis, an in-depth investigation of the dynamic properties of granite specimens was conducted. The dynamic properties of the granite specimens were investigated using a triaxial cyclic loading machine, under different confining pressures, loading frequencies, stress amplitudes, and numbers of cycles, and a dynamic response model was constructed from the test data. The results show that the dynamic elastic modulus increased with the increase in confining pressure, while its damping ratio decreased. The dynamic elastic modulus and damping ratio increased with the increase in loading frequency. As the dynamic stress amplitude increased, the dynamic elastic modulus of the granite increased, but the dynamic damping ratio decreased. As the number of cycles increased, the dynamic elastic modulus and dynamic damping ratio of the granite decreased and gradually stabilized. The modified Duncan–Chang model was used to construct the dynamic response model of the specimens. It is worth saying that the correlation coefficient of the model is low at a loading frequency of 20 Hz. This indicates that the frequency has a greater effect on the dynamic response of the specimen compared with the confining pressure. The conclusions obtained from these tests can be used to study more comprehensively the interaction and causal relationship between different factors, and to prepare for the next steps of tunnel rock stress-state prediction.

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Section: Literature Review and Discussionmentioning

confidence: 99%

A Thorough Investigation of the Dynamic Properties of Granite under Cyclic Loading

Ding,

Zhao,

Dong

et al. 2023

Applied Sciences

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“…Each component is constructed from 40Cr alloy steel. During the loading phase, a spindle-shaped striker head generated semi-sinusoidal waves, ensuring a consistent strain rate until the rock sample failed [32]. A high-speed camera was mounted in the SPHB frame to capture the fracturing process.…”

Section: Experiments Instrumentsmentioning

confidence: 99%

Dynamic Loading Effects on the Mechanical Behavior and Constitutive Damage Model of Foliated Slate

Ou,

Xu,

et al. 2024

Preprint

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Understanding the anisotropic mechanical properties of rocks is crucial in rock engineering planning and execution. Layered structures, including foliation and bedding, introduce planes of weakness that profoundly affect the rock's mechanical response. This research aimed to examine the impact of foliation orientation, indicated by the dip angle (θ), and the strain rate (\(\dot {\varepsilon }\)) on the dynamic mechanical behaviour of the slate. To this end, dynamic compression tests were conducted on slate samples utilizing a split-Hopkinson pressure bar (SHPB). When the foliation is parallel to horizontal plane (θ = 0°), tensile mechanism dominates the failure mode. When the foliation planes take a dip angle to horizontal plane (θ = 30°, 45° and 60°), shear-sliding along foliation planes gradually dominated as the angle increased, resulting in shear-tensile failure. When the foliation planes are perpendicular to horizontal plane (θ = 90°), the sample primarily exhibits tensile splitting failure along foliation planes. Motivated by experimental results, we developed a constitutive model to characterize the damage process of foliated slate. The model assumes that the strength of microstructural units within foliated slate follows a Weibull distribution. To account for the effects of different dip angles and strain rates on the slate foliation planes' response, a dynamic loading viscous coefficient, η, is incorporated. The proposed model has precise physical meanings and proficiently illustrates the complete stress-strain process of the slate.

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“…In order to obtain the mechanical parameters required for the numerical model, this paper carried out both static and dynamic mechanical tests. The numerical model parameters were calibrated through static tests, which were then used to validate the results of the dynamic tests 42 , 43 . Since the SHPB test has a symmetrical structure in the up-down and left–right directions, a quarter-symmetry model was chosen for numerical simulation using LS-DYNA to save computation time and disk space.…”

Section: Numerical Simulationsmentioning

confidence: 99%

Dynamic mechanical properties of different types of rocks under impact loading

Wang,

Huang,

Chen

et al. 2023

Sci Rep

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To study the mechanical properties of different types of rocks under impact loading, static mechanical parameter tests and split-Hopkinson pressure bar (SHPB) dynamic impact experiments were conducted on five typical rock specimens. The mechanical properties and failure modes of different rock specimens under the same static and dynamic loading were investigated. The differences between numerical simulation results and laboratory test results under different constitutive models in LS-DYNA were also compared and analyzed. The results show that with the increase of SHPB impact pressure (0.5–0.8 MPa), the stress peak values of granite, marble, and limestone also increase, while gypsum and reef limestone follow no particular trend. At the same time, both HJC and RHT constitutive models can simulate the laboratory impact test results of granite, marble, and limestone, however, the gypsum and reef limestone are not modelled by the HJC constitutive model, while the RHT constitutive model can describe the deformation-damage-failure process of rock specimens with different strengths. Therefore, the RHT model can better reflect the real deformation and failure of rocks.

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Effect of loading characteristics and specimen size in split Hopkinson pressure bar test on high-rate behavior of phyllite

Cited by 10 publications

References 35 publications

A Thorough Investigation of the Dynamic Properties of Granite under Cyclic Loading

A Thorough Investigation of the Dynamic Properties of Granite under Cyclic Loading

Dynamic Loading Effects on the Mechanical Behavior and Constitutive Damage Model of Foliated Slate

Dynamic mechanical properties of different types of rocks under impact loading

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