Natural time analysis of acoustic emissions before fracture: Results compatible with the Bak-Tang-Wiesenfeld model

Natural time analysis has been recently applied for the elaboration of data recorded by means of the Acoustic Emission (AE) sensing technique while specimens and structures are mechanically loaded at levels approaching those causing macroscopic fracture. In terms of the variance , the entropy in nat...

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Bibliographic Details
Published in:Europhysics letters 2022-07, Vol.139 (1), p.12004
Main Authors: Loukidis, A., Perez-Oregon, J., Pasiou, E. D., Kourkoulis, S. K., Sarlis, N. V., Triantis, D.
Format: Article
Language:English
Subjects:
Acoustic emission
Data analysis
Emission analysis
Entropy
Fiber reinforced concretes
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Summary:Natural time analysis has been recently applied for the elaboration of data recorded by means of the Acoustic Emission (AE) sensing technique while specimens and structures are mechanically loaded at levels approaching those causing macroscopic fracture. In terms of the variance , the entropy in natural time S , as well as the entropy in natural time under time reversal , a complex behavior was observed, which could be understood by the Burridge-Knopoff train model and the Olami-Feder-Christensen earthquake model. Here, the AE data recorded when notched fiber-reinforced concrete specimens were subjected to three-point bending until fracture, are analysed in natural time. The analysis leads to , S , and values that are compatible with those obtained by a centrally fed Bak-Tang-Wiesenfeld sandpile model, which was theoretically studied in natural time almost a decade ago.
ISSN:0295-5075
1286-4854
DOI:10.1209/0295-5075/ac7bee