Journal ArticleDOI
Acoustic emission characteristics of creep fracture evolution in double-fracture fine sandstone under uniaxial compression
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TLDR
In this article, acoustic emission (AE) experiments were carried out to study short-time creep behavior under uniaxial compression for cuboid-shaped fine sandstone specimens with two pre-existing cracks.About:
This article is published in Engineering Fracture Mechanics.The article was published on 2019-04-01. It has received 81 citations till now. The article focuses on the topics: Acoustic emission & Creep.read more
Citations
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Evaluation of internal microcrack evolution in red sandstone based on time–frequency domain characteristics of acoustic emission signals
TL;DR: In this paper, a uniaxial compression experiment was conducted based on RMT-150C rock mechanics, PCI-II acoustic emission (AE), and the strain acquisition testing systems.
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Study on the Triaxial Unloading Creep Mechanical Properties and Damage Constitutive Model of Red Sandstone Containing a Single Ice-Filled Flaw
TL;DR: Wang et al. as mentioned in this paper proposed a new nonlinear creep damage model of frozen fissured red sandstone with the improved Burgers model and elastoplastic damage model for coal mine shafts.
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Creep properties and resistivity-ultrasonic-AE responses of cemented gangue backfill column under high-stress area
TL;DR: In this article, the uniaxial compression creep tests were conducted by single-step and multi-step loading of prismatic samples made of cemented gangue backfill material (CGBM) under the high stress-strength ratio.
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Cracking and deformation of cuboidal sandstone with a single nonpenetrating flaw under uniaxial compression
TL;DR: In this article , the authors used 3D particle flow code to investigate the crack propagation mechanisms under uniaxial compression and found that the average peak strength increases with the growth of non-penetrating flaw angle and reduced by 21.8% for 0°, 16.0% for 30°, 13.0%, 4.7% for 60°, and 0.5% for 90° compared with the peak strength of the intact specimen.
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Experimental and numerical studies on progressive debonding of grouted rock bolts
TL;DR: In this paper, both laboratory experiment and numerical simulation of the pull-out tests were performed, and a relationship between the pullout strength of the bolt and the uniaxial compressive strength (UCS) of cement mortar material specimen was established.
References
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Fracture coalescence in rock-type materials under uniaxial and biaxial compression
TL;DR: In this paper, the authors investigate fracture coalescence in gypsum specimens under uniaxial and biaaxial compression and show that cracks start at the flaw tip and propagate out of plane as either tensile or shear cracks.
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Crack Coalescence in Molded Gypsum and Carrara Marble: Part 1. Macroscopic Observations and Interpretation
TL;DR: In this paper, a high speed video system was used, which allowed us to precisely observe the cracking mechanisms and identified nine crack coalescence categories with different crack types and trajectories.
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Experimental research on pre-cracked marble under compression
TL;DR: In this article, an experimental approach on propagation and coalescence of pre-existing cracks (fractures) in marble samples under compression is carried out, and two types of newborn cracks are observed: wing (tensile) cracks and secondary (shear) cracks.
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Experimental Investigation on the Strength, Deformability, Failure Behavior and Acoustic Emission Locations of Red Sandstone Under Triaxial Compression
TL;DR: In this paper, the post-peak axial deformation characteristics of red sandstone changed as the confining pressure was increased from 5 to 65 MPa, but Poisson's ratio remained unchanged.
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Detailed analysis of acoustic emission activity during catastrophic fracture of faults in rock
Xinglin Lei,Koji Masuda,Osamu Nishizawa,Laurence Jouniaux,Liqiang Liu,Wentao Ma,Takashi Satoh,Kinichiro Kusunose +7 more
TL;DR: In this paper, a detailed time-space distribution of acoustic emission (AE) events during the catastrophic fracture of rock samples containing a preexisting joint or potential fracture plane is obtained under triaxial compression using a high-speed 32-channel waveform recording system, and the results are discussed with respect to the prediction and characterization of catastrophic fault failure.