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Hugoniot equation of state of rock materials under shock compression

by Zhao, J. , Zhang, Q. B. , Braithwaite, C. H.

in Brittle materials / Compression tests / Dynamic Loading / Equation Of State / Equations of state / Free surfaces / Gabbro / Hugoniot equation of state / Manganin / Marble / Measuring instruments / Nonlinear response / Plate Impact / Rock Materials / Shock Compression / Strain Rate / Stress gauges / Velocimetry / Velocity / Velocity measurement

2017

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Hugoniot equation of state of rock materials under shock compression

by Zhao, J. , Zhang, Q. B. , Braithwaite, C. H.

2017

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Hugoniot equation of state of rock materials under shock compression

by Zhao, J. , Zhang, Q. B. , Braithwaite, C. H.

2017

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Journal Article

Hugoniot equation of state of rock materials under shock compression

Zhao, J.,

Zhang, Q. B.,

Braithwaite, C. H.

2017

Overview

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-up) plane, while for marble a nonlinear response was observed. The EOS relations between shock velocity (US) and particle velocity (up) are linearly fitted as US = 2.62 + 3.319up and US = 5.4 85 + 1.038up 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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Publisher

The Royal Society Publishing

Subject

/ Gabbro