Fracture and Time-Varying Multifractal Behaviors of Single-Flawed Red Sandstone with Different Wavilness Angles
Publication: Journal of Materials in Civil Engineering
Volume 32, Issue 9
Abstract
To study the cracking behaviors and deformation damage process of single-flawed red sandstone with different wavilness angles, a series of uniaxial compression tests are conducted to investigate the effect of wavilness angles on the mechanical characteristics of the flawed red sandstone as well as crack initiation modes and ultimate failure modes. The real-time cracking behaviors of single-flawed red sandstone specimens with different wavilness angles are monitored using acoustic emission (AE) and photographic capturing technologies. The relationship among the AE rate curve, axial stress-time curve, and cracking process is constructed to evaluate the macroscopic deformation characteristics of preflawed rock. Moreover, the deformation damage process of single-flawed red sandstone with different wavilness angles is studied by using multifractal theory. A quantitative criterion is developed based on multifractal parameters of the AE time series, and the combined application of multifractal parameters can be considered as a precursor in the deformation and fracture damage process of flawed rocks.
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Data Availability Statement
The experimental data used during the study are available from the corresponding author by appropriate request.
Acknowledgments
The present work is supported by the Fundamental Research Funds for the Central Universities (Grant No. 2019CDXYTM0033) and the National Natural Science Foundation of China (Grant Nos. 51839009 and 51679017), which are gratefully acknowledged.
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Published In
Journal of Materials in Civil Engineering
Volume 32 • Issue 9 • September 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Nov 27, 2019
Accepted: Feb 24, 2020
Published online: Jul 9, 2020
Published in print: Sep 1, 2020
Discussion open until: Dec 9, 2020
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