Issue |
EPL
Volume 139, Number 1, July 2022
|
|
---|---|---|
Article Number | 12004 | |
Number of page(s) | 6 | |
Section | Mathematical and interdisciplinary physics | |
DOI | https://doi.org/10.1209/0295-5075/ac7bee | |
Published online | 20 July 2022 |
Natural time analysis of acoustic emissions before fracture: Results compatible with the Bak-Tang-Wiesenfeld model
1 Electronic Devices and Materials Laboratory, Department of Electrical and Electronics Engineering, University of West Attica - 250 Thivon Avenue, 122 44, Athens, Greece, EU
2 Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana - C.P. 14387 México City, Mexico
3 Laboratory for Testing and Materials, Department of Mechanics, National Technical University of Athens Theocaris Building, 5 Heroes of Polytechnion Avenue, 157 73, Athens, Greece, EU
4 Section of Condensed Matter Physics, Physics Department, National and Kapodistrian University of Athens Panepistimiopolis, Zografos 157 84, Athens, Greece, EU
5 Solid Earth Physics Institute, Physics Department, National and Kapodistrian University of Athens Panepistimiopolis, Zografos 157 84, Athens, Greece, EU
(a) E-mail: nsarlis@phys.uoa.gr (corresponding author)
Received: 21 April 2022
Accepted: 24 June 2022
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.
© 2022 The author(s)
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