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Full-Text Articles in Civil and Environmental Engineering
Mechanical Characteristics And Fracture Mechanism Of 3d Printed Rock Samples With Cross Joints, Ben-Xin Wang, Ai-Bing Jin, Shu-Liang Wang, Hao Sun
Mechanical Characteristics And Fracture Mechanism Of 3d Printed Rock Samples With Cross Joints, Ben-Xin Wang, Ai-Bing Jin, Shu-Liang Wang, Hao Sun
Rock and Soil Mechanics
The cross joints, which are ubiquitous in real rock mass, have significant influences on the fracture characteristics of rock mass but it has not been thoroughly studied. In this paper, the 3D printed samples with cross joints are made. The mechanical fracture characteristics of rock samples with cross joints under uniaxial compression are studied by means of acoustic emission, CT scanning technology and DIC image analysis. The results show that the relationships between fracture fractal dimension (DB) and uniaxial strength, elastic modulus and Poisson’s ratio have similar trends when the dip angle of primary joint is small, which has a …
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 …