Failure process and mechanism of sandstone under combined equal biaxial static compression and impact loading

Failure process and mechanism of sandstone under combined equal biaxial static compression and... The process and mechanism of impact fractures in sandstone were investigated under equal biaxial static compression. The cracking process was captured by a high‐speed video camera. The results indicate that the main crack propagates along the circumference and finally forms a crater‐shaped failure zone. The size of the crater‐shaped failure zone increases as the static stress and impact velocity increase. In addition, microscopic features of the fracture surface were observed using a scanning electron microscope. It was found that the microcracks expand after combination loading, making the rock more susceptible to damage. Finally, the influence mechanism of static loading on dynamic failure of the rock was revealed by theoretical analysis and numerical simulation. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Strain Wiley

Failure process and mechanism of sandstone under combined equal biaxial static compression and impact loading

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Publisher
Wiley
Copyright
© 2018 John Wiley & Sons Ltd
ISSN
0039-2103
eISSN
1475-1305
D.O.I.
10.1111/str.12267
Publisher site
See Article on Publisher Site

Abstract

The process and mechanism of impact fractures in sandstone were investigated under equal biaxial static compression. The cracking process was captured by a high‐speed video camera. The results indicate that the main crack propagates along the circumference and finally forms a crater‐shaped failure zone. The size of the crater‐shaped failure zone increases as the static stress and impact velocity increase. In addition, microscopic features of the fracture surface were observed using a scanning electron microscope. It was found that the microcracks expand after combination loading, making the rock more susceptible to damage. Finally, the influence mechanism of static loading on dynamic failure of the rock was revealed by theoretical analysis and numerical simulation.

Journal

StrainWiley

Published: Jan 1, 2018

Keywords: ; ; ;

References

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