Experimental Study on Rock Deformation Localization Using Digital Image Correlation and Acoustic Emission
Source abstract
Abstract
In this study, the digital image correlation (DIC) method and acoustic emission (AE) technology were combined to study the evolution of rock deformation localization in detail. The second-order spatial–temporal subset DIC (STS-DIC) algorithm was proposed and used for measuring strongly heterogeneous deformation fields of red sandstone specimens under uniaxial compression. The evolution of the deformation field was analyzed with a focus on the deformation localization stage. The length and width of the deformation localization band (DLB) were measured, and the relationships between the relative sliding rate of the DLB, the relative opening rate of the DLB, and the AE counts were identified. Deformation localization was found to result from the rapid evolution of the strain concentration before the peak stress. The complete development of the DLB is an inducing factor for catastrophic rock failure, and the failure modes of the rock specimens were consistent with the final state of the DLB. A good correlation was identified between the AE counts and the relative displacement rate of the DLB, and the sliding rate was found to have a significant influence on the AE counts.
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Research context
OpenAlex topics: Rock Mechanics and Modeling · Drilling and Well Engineering · Geoscience and Mining Technology
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China
Centre of Flexible Optical Measurement Technology, Institute of Flexible Electronics Technology of THU, Zhejiang, Jiaxing 314006, China
School of Civil Engineering, North China University of Technology, Beijing 100144, China
Funding
National Natural Science Foundation of China · Natural Science Foundation of Zhejiang Province
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