Application of acoustic emission monitoring and signal analysis to the qualitative and quantitative characterization of the fracturing process in rocks

At microscopic level, natural flaws act as stress concentrators in rock, favoring brittle fracture. Acoustic emission (AE) monitoring was applied for the qualitative and quantitative assessment of the fracturing process in two types of rocks subjected to diametral compression tests. The process was based on AE parameters, petrographic analysis, signal processing in the time-frequency domain, and three-dimensional localization. It was observed...