Numerical Simulations on Cracking Behavior of Rock-Like Specimens with Single Flaws under Conditions of Uniaxial and Biaxial Compressions
Publication: Journal of Materials in Civil Engineering
Volume 31, Issue 12
Abstract
The expanded distinct element method based on a strain strength criterion was applied herein with the aim of analyzing and comparing the cracking behaviors of rock-like specimens with single flaws under uniaxial and biaxial compressions. The cracking characteristics in uniaxial and biaxial compressions were compared and the effects of confining pressure on the tensile/shear behaviors were analyzed. The confining pressure obviously changed the boundary condition and the cracking behaviors in biaxial compression. The initiation stress, the peak strength, and the number of shear cracks in biaxial compression were obviously larger than in uniaxial compression. The confining pressure affected the initiation and propagation of the secondary cracks, the failure mechanisms, and the distribution of horizontal displacement fields in a large extent. The initiation and propagation of the tensile cracks were inhibited by the confining pressure. An increase in confining pressure had no obvious effects on the initiation time and the propagation rates of the shear cracks but mainly affected the numbers of shear cracks.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the submitted article.
Acknowledgments
The authors would like to acknowledge the financial support of the National Key R and D Program of China (2017YFC0806000), the National Natural Science Foundation of China (41202193, 41572262, and 41502275), the Shanghai Rising-Star Program (17QC1400600), the Fundamental Research Funds for the Central Universities (0200219207), the Shanghai Municipal Science and Technology Major Project (2017SHZDZX02), and the Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province.
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Published In
Journal of Materials in Civil Engineering
Volume 31 • Issue 12 • December 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Jul 27, 2018
Accepted: Jun 14, 2019
Published online: Sep 30, 2019
Published in print: Dec 1, 2019
Discussion open until: Feb 29, 2020
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