Impacts of Cyclic Loading and Unloading Rates on Acoustic Emission Evolution and Felicity Effect of Instable Rock Mass

<div>The AE signal and frequency spectrum of 1# red sandstone specimen at the complete fracturing moment. (a) Time-varying AE signal; (b) signal frequency spectrum.</div>

Advances in Materials Science and Engineering

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Figure 2

Figure 2: Impacts of Cyclic Loading and Unloading Rates on Acoustic Emission Evolution and Felicity Effect of Instable Rock Mass 