Acoustic emission characteristics of the rock-like material containing a single flaw under different compressive loading rates

To investigate the acoustic emission characteristic of rock under different compressive loading rates, a numerical approach using the bonded-particle model (BPM) is adopted in the present study. It reveals that under uniaxial compressive test, the physical mechanism and distribution of AE events rec...

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Bibliographic Details
Published in:Computers and geotechnics 2017-03, Vol.83, p.83-97
Main Authors: Zhang, Xiao-ping, Zhang, Qi, Wu, Shunchuan
Format: Article
Language:English
Subjects:
Acoustic emission
Acoustic emission (AE)
Acoustics
AE magnitudes
Bonded-particle model (BPM)
Crack number
Distribution
Emission analysis
Experiments
Load distribution
Loading rate
Loading rates
Mathematical models
Rocks
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Summary:To investigate the acoustic emission characteristic of rock under different compressive loading rates, a numerical approach using the bonded-particle model (BPM) is adopted in the present study. It reveals that under uniaxial compressive test, the physical mechanism and distribution of AE events recorded by the BPM are generally consistent with the phenomena observed from the laboratory experiments. The total crack number, tensile crack number, shear crack number and AE event number increase as the loading rate increases. The increase of loading rates from 0.005m/s to 0.6m/s in the BPM does not have obvious influence on the distribution of AE events.
ISSN:0266-352X
1873-7633
DOI:10.1016/j.compgeo.2016.11.003