Fractal Characteristics and Acoustic Emission during the Failure Process of Argillaceous Siltstone with Different Moisture Contents

Figure 2

(a) Photo of the test setup. (b) DIC desktop (left) and AE desktop (right). (c) Argillaceous siltstone with speckle pattern and the locations of the attached AE sensors (from 1 to 4). (d) Argillaceous siltstone specimens.