Yao Xulong

TL;DR: In this paper, a frequency division processing method for the standard description expressions of discrete signals and for defining the integrated characteristics of acoustic emission (AE) signals was proposed, and the frequency evolution of rock fracture-related AEs was investigated under uniaxial loading conditions, and rocks in dry and saturated states were examined and compared using AE information in FBs.

TL;DR: In this article, an acoustic emission (AE) monitoring system and a CCD camera are used to catch the characteristics of crack evolution, showing that crack status is influenced by rock physical properties and its stress boundary, there exists a positive correlation between normal force and crack geometry (such as the angle of en echelon crack).

TL;DR: In this paper, a multiaxial multi-stage loading test was conducted on siltstone to attain wave velocity imagings during rock fracture, and the experimental result showed that the wave velocity images enable three-dimensional visualization of the extent and spatial position of damage to the rock.

TL;DR: In this paper, acoustic emission waveform signals during rock loading are acquired through uniaxial compression test of granite in laboratory and digital image correlation technology is used, showing the usefulness of the DIC and acoustic emission techniques in experiment of that type.

TL;DR: In this paper, a rock acoustic emission source positioning method is presented, where the acoustic emission sensors are placed on the periphery of the cuboid sample, and vaseline is smeared between the sensors and the sample.