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Fracture damage prediction in fissured red sandstone under uniaxial compression: acoustic emission b ‐value analysis
Author(s) -
Niu Yong,
Zhou XiaoPing,
Zhou LunShi
Publication year - 2020
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.13113
Subject(s) - acoustic emission , cracking , fracture (geology) , materials science , macro , digital image correlation , scale (ratio) , compression (physics) , geotechnical engineering , structural engineering , forensic engineering , composite material , geology , engineering , computer science , cartography , programming language , geography
In this paper, uniaxial compression tests are conducted on fissured red sandstone specimens to predict fracture damage (large‐scale events). The acoustic mission (AE) coupled with digital image correlation (DIC) technologies are used to monitor and record the real‐time cracking process of tested specimens. The AE characteristics are analysed during the cracking process. Moreover, three types of b ‐value methods based on the AE parameters are adopted to predict the occurrence of large‐scale events (macro‐cracking). The results show that every macro‐cracking leads to a rapid decrease in three types of b value. When the fissured specimens reach to ultimate failure, all three types of b value reach to the minimum. The b value based on the AE parameters can be used as a predictor of large‐scale events during the cracking process of fissured rocks.