Plate impact experiments to investigate shock-induced inelasticity in Westerly granite

Yuan, Fuping; Prakash, Vikas

doi:10.1016/j.ijrmms.2012.12.024

Cited by 24 publications

(9 citation statements)

References 21 publications

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“…Ai and Ahrens [26] determined the dynamic tensile strength of granite to be 0.13 GPa. Additionally, in plate impact experiments to investigate shock-induced inelasticity in Westerly granite, the mechanical property is weaker than the general granite, and the spall strength is 0.05 GPa [48]. Because it is short of the specific value of the spall strength (dynamic tensile strength), spall T , for Barre granite, in this study the intermediate approximate value of (0.05 GPa, 0.13 GPa) was chosen to ensure the magnitude of the spall strength, and a value of 0.10 GPa spall T = was assumed.…”

Section: Determination Of Intact Strengthmentioning

confidence: 99%

Johnson–Holmquist-II(JH-2) Constitutive Model for Rock Materials: Parameter Determination and Application in Tunnel Smooth Blasting

2018

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The Johnson–Holmquist-II(JH-2) model is introduced as the constitutive model for rock materials in tunnel smooth blasting. However, complicated and/or high-cost experiments need to be carried out to obtain the parameters of the JH-2 constitutive model. This study chooses Barre granite as an example to propose a quick and convenient determination method for the parameters of the JH-2 model using a series of computational and extrapolated methods. The validity of the parameters is verified via comparing the results of 3D numerical simulations with laboratory blast-loading experiments. Subsequently, the verified parameter determination method, together with the JH-2 damage constitutive model, is applied in the numerical simulation of smooth blasting in Zigaojian tunnel, Hangzhou–Huangshan high-speed railway. The overbreak/underbreak induced by rock blasting and joints/discontinuities is well estimated through comparing the damage contours resulting from the numerical study with the tunnel profiles measured from the tunnel site. The peak particle velocities (PPVs) of the near field are extracted to estimate the damage scope and damage degree for the surrounding rock mass of the tunnel on the basis of PPV damage criteria. This method can be used in the excavation of rock tunnels subjected to large strains, high strain rates, and high pressures, thereby reducing safety risk and economic losses.

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Section: Determination Of Intact Strengthmentioning

confidence: 99%

Johnson–Holmquist-II(JH-2) Constitutive Model for Rock Materials: Parameter Determination and Application in Tunnel Smooth Blasting

2018

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“…e Hugoniot elastic limit (or HEL, for short) is a fundamental dynamic material property of solid materials, and it is important to study stress wave propagation and evolution of internal damage of materials under explosion and high velocity impact effects [1][2][3][4][5]. e HEL is believed to represent the maximum stress that a rock or other solid materials can withstand under conditions of rapid onedimensional compression without internal rearrangement taking place in the material at the shock front.…”

Section: Introductionmentioning

confidence: 99%

“…Values of HEL have been investigated experimentally using a variety of techniques including explosive detonation loading and flyer-plate impact studies. In these studies, velocity interferometer for any reflector (or VISAR, for short), displacement interferometer for any reflector (or DISAR, for short), and embedded manganin pressure gauges were used to measure the free surface particle velocity or the normal stress parallel to the propagation direction of the shock wave, and the amplitude of the first shock wave front, which has the greater propagation velocity, is the HEL [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Calculation Method for the Hugoniot Elastic Limit of Hard Rock Based on Ideal Elastoplastic Model

Cheng

Song

Tan

et al. 2021

Shock and Vibration

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To study the theoretical calculation method of the HEL for hard rock, the major factors determining the strength of rock under dynamic loadings are firstly discussed. Secondly, the calculation method of the HEL of hard rock is suggested based on the Lundborg strength criterion, and the parameters influencing the HEL are analyzed and discussed. Thirdly, the HEL obtained by theoretical calculation, numerical modeling, and experiments are compared. Fourthly, the abnormal decreasing or increasing of the HEL in plate impact experiments of hard rock is explained. This research shows that the HEL increases with Poisson’s ratio, the shear strength at zero pressure, the coefficient of internal friction and the plastic limit, and Poisson’s ratio and the plastic limit could be the most important factors. The simplified model of this work can give a rational and practical prediction of the HEL of hard rock in theory, and the complicated interaction between the “damage front” and the diffuse elastic precursor is assumed to explain two special effects of the HEL in plate impact experiments of hard rock, where Poisson’s ratio related to damage levels seems to be the dominant factor.

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“…However, elastic and elasticplastic behaviours and the effects of material structure should be considered at low pressures (below 20 GPa) [23]. Experimental data are not comprehensive in the pressure range lower than 20 GPa, although some examples are quartz, calcite and plagioclase rocks [24], Westerly granite and Nugget sandstone [25], anorthosite and gabbro [26], Hunters Trophy tuff, UTTR limestone, Pennsylvania slate and permafrost phyllite [27], Kinosaki basalt [28,29], Bukit Timah granite [30], Swedish gabbro and Loughborough granite [31], Berea sandstone [32], dolerite [33], limestone [34], kimberlite breccia [19] and Westerly granite [35].…”

Section: Introductionmentioning

confidence: 99%

Hugoniot equation of state of rock materials under shock compression

Zhang

Braithwaite

Zhao

2017

Phil. Trans. R. Soc. A.

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Two sets of shock compression tests (i.e. conventional and reverse impact) were conducted to determine the shock response of two rock materials using a plate impact facility. Embedded manganin stress gauges were used for the measurements of longitudinal stress and shock velocity. Photon Doppler velocimetry was used to capture the free surface velocity of the target. Experimental data were obtained on a fine-grained marble and a coarse-grained gabbro over a shock pressure range of approximately 1.5-12 GPa. Gabbro exhibited a linear Hugoniot equation of state (EOS) in the pressure-particle velocity (P-u) plane, while for marble a nonlinear response was observed. The EOS relations between shock velocity (U) and particle velocity (u) are linearly fitted as U = 2.62 + 3.319u and U = 5.4 85 + 1.038u for marble and gabbro, respectively.This article is part of the themed issue 'Experimental testing and modelling of brittle materials at high strain rates'.

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Plate impact experiments to investigate shock-induced inelasticity in Westerly granite

Cited by 24 publications

References 21 publications

Johnson–Holmquist-II(JH-2) Constitutive Model for Rock Materials: Parameter Determination and Application in Tunnel Smooth Blasting

Johnson–Holmquist-II(JH-2) Constitutive Model for Rock Materials: Parameter Determination and Application in Tunnel Smooth Blasting

Theoretical Calculation Method for the Hugoniot Elastic Limit of Hard Rock Based on Ideal Elastoplastic Model

Hugoniot equation of state of rock materials under shock compression

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