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Full-Text Articles in Civil and Environmental Engineering
Effect Of Sensor Calibration On Moment Tensor Analysis Of Granite Uniaxial Compression, Yi Ren, Shun-Chuan Wu, Yong-Tao Gao, Yi-Xiong Gan
Effect Of Sensor Calibration On Moment Tensor Analysis Of Granite Uniaxial Compression, Yi Ren, Shun-Chuan Wu, Yong-Tao Gao, Yi-Xiong Gan
Rock and Soil Mechanics
Moment tensor inversion theory is an effective method to study the rock failure mechanism. However, the inversion results are prone to large errors, which can mislead the understanding of fracture mechanism. In order to achieve a better understanding of the generation process and the mechanism of the rock macro-fracture surface, we perform a location analysis of source events based on the uniaxial compression test of a granite sample, with the help of ultrasonic testing and acoustic emission monitoring. The events near the macro-fracture with small location errors are selected for moment tensor inversion. Then, we use the network calibration method …
Study On The Fracture Mechanism Of 3d-Printed-Joint Specimens Based On Dic Technology, Ai-Bing Jin, Shu-Liang Wang, Ben-Xin Wang, Hao Sun, Yi-Qing Zhao
Study On The Fracture Mechanism Of 3d-Printed-Joint Specimens Based On Dic Technology, Ai-Bing Jin, Shu-Liang Wang, Ben-Xin Wang, Hao Sun, Yi-Qing Zhao
Rock and Soil Mechanics
In order to accurately characterize the deformation and failure modes of prefabricated jointed rocks with different angles under uniaxial compression, a joint model based on 3D printing technology was used to simulate the structural surface in the rock mass. Rock specimens with precast joints with different angles were obtained by pouring cement mortar, and a uniaxial compression test was performed. At the same time, digital image correlation (DIC) technology was used to observe and analyze the process of crack formation, propagation, and penetration in the test specimen. The results showed that as the angle of prefabricated joints increased from 0° …
Numerical Simulation Of Failure Processes Of Heterogeneous Rock Specimens Under Assumption Of Invariant Spherical Stress During Stress Drop, Qin Shu, Xue-Bin Wang, Yang-Feng Zhao, Xue-Yuan Bai
Numerical Simulation Of Failure Processes Of Heterogeneous Rock Specimens Under Assumption Of Invariant Spherical Stress During Stress Drop, Qin Shu, Xue-Bin Wang, Yang-Feng Zhao, Xue-Yuan Bai
Rock and Soil Mechanics
Using the self-developed code based on the SPH (smoothed particle hydrodynamics) method, evolution of the shear bands and acoustic emission events during failure processes of heterogeneous rock specimens under plane strain uniaxial compression is studied. Based on the Mohr-Coulomb criterion with tensile truncation, the stress calculation method of the failed particle is deduced under the assumption that the spherical stress tensor is invariant during the stress drop. Numerical results show that the longitudinal stress-longitudinal strain curves of the specimens with lower homogeneous degrees demonstrate obvious strain hardening and strain softening stages; strain hardening stages of the specimens with higher homogeneous …