A deformation measurement method based on surface texture information of rocks and its application

Zhang, Yanbo; Han, Xin; Liang, Peng; Yao, Xulong; Li, Qun; Yu, Guangyuan; Wang, Qi

doi:10.1016/j.ijmst.2023.08.001

Cited by 1 publication

(1 citation statement)

References 22 publications

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“…The advancement of detection technology has increasingly attracted scholars to apply it in rock mechanics engineering research. Techniques such as acoustic emission, infrared remote sensing, digital speckle, CT scanning, electron microscopy scanning, and others have all seen successful applications [1][2][3][4][5][6][7][8]. Acoustic emission involves using specialized equipment to monitor and record the sound waves produced by microcracks or displacement released internally in rocks due to stress concentration during loading.…”

Section: Introductionmentioning

confidence: 99%

Acoustic emission characteristic of sandstone and sandstone like material under multi-path loading

Zhuang,

Peng,

Zhao

et al. 2024

PLoS ONE

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Using spline interpolation to select proportions of similar materials, a comparative analysis of the fracturing behavior of sandstone specimens and similar material specimens was conducted through Brazilian splitting tests under multi-path loading. The study revealed that during stepwise loading, both sandstone and similar materials exhibited memory effects and plastic deformation. However, under constant velocity loading, the relationship between force and displacement in sandstone showed linearity after compaction. Employing MATLAB optimization algorithms for the inversion of acoustic emission event information, the distribution of fracture points, and the evolution of cracks were analyzed. The findings indicated that under stepwise loading, both sandstone and similar materials exhibited banded distribution of peak frequencies, with sandstone concentrated in the mid-low-frequency range and similar materials leaning towards the low-frequency range. The amplitude-frequency characteristics of acoustic emission signals suggested that initially, sandstone produced low-frequency, low-amplitude signals. As cracks developed, these signals gradually transformed into high-frequency, high-amplitude signals, ultimately leading to macroscopic failure. The ringing counts and b-values of sandstone displayed an approximate "W" shape distribution, with a subsequent decrease in b-values during final failure. In contrast, the acoustic emission counts were inversely related to b-values. Similar materials exhibited slightly more acoustic emission counts than sandstone, with relatively lower b-values. The crack development process of both sandstone and similar materials was confirmed through these observations. From the perspective of section initiation and local damage, sandstone and similar materials exhibited similar failure characteristics. The proportions of quartz sand: cement: water = 9:1:0.9 in similar materials demonstrated the most similar characteristics to sandstone in terms of mechanical loading, acoustic emission features, and failure morphology. This suggests that these similar materials can be used as substitutes for sandstone in analogous simulation experiments. The study provides theoretical support for understanding rock fracture mechanisms, offers guidance for the selection and proportioning of similar materials, and holds significance for predicting and controlling rock fracture behavior in engineering applications.

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