Abstract
Acoustic emissions have been monitored during rock compression under both quasi-static and dynamic conditions. A new method is proposed in this study to study the damage evolution of rocks during dynamic compression by continuous wavelet analysis of acoustic emission signals. Wavelet analysis is first validated against conventional method using the acoustic emission data from a quasi-static compression test. The wavelet analysis is then carried out on acoustic emission signals from rock dynamic compression to obtain the time–frequency spectrum. Based on the characteristics of the time–frequency spectrums, the rock exhibits a mixed damage mode shifting from tensile to shear damage. The increase in the loading rate leads to an increase in the amount of tensile damage. The proposed method provides an effective way to analyze the dynamic damage evolution of rocks.
Highlights
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A new method is proposed to study the damage evolution during rock dynamic compression using acoustic emission (AE) signals.
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This method uses the characteristics of time–frequency spectrum of AE signals obtained from continuous wavelet analysis.
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During dynamic compression the rock exhibits a mixed damage mode shifting from tensile to shear damage.
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Data Availability
The data that support the findings of this study are available from the corresponding author upon reasonable request.
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Acknowledgements
This work has been supported by the National Natural Science Foundation of China (No. 42377147, No. 42141010, and No. 52079091), Natural Science Foundation of Tian** City (No. 21JCZXJC00040), and the Tian** Research Innovation Project for Postgraduate Students (No. 2022SKY047).
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Yang, L., Wu, B., Xu, Y. et al. Damage Evolution During Rock Dynamic Compression Revealed by Wavelet Analysis of Acoustic Emission Signals. Rock Mech Rock Eng 57, 1527–1535 (2024). https://doi.org/10.1007/s00603-023-03644-1
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DOI: https://doi.org/10.1007/s00603-023-03644-1