Acoustic Emission Analysis of Cement Mortar Specimens During Three Point Bending Tests

Triantis, Dimos; Kourkoulis, Stavros K.; Pasiou, Ermioni D.; Dakanali, Ioanna

doi:10.1590/1679-78252486

Cited by 31 publications

(28 citation statements)

References 30 publications

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“…of a one-dimensional map, x being the dynamic variable (e.g., at the Feigenbaum point of the z-logistic dissipative map). Many other examples have been exhibited in the literature, e.g., in quark-gluon plasma [150], in the standard map [151], in (asymptotically) scale-free networks [152], acoustic emission analysis of cement mortar [153] (see Fig. 3), and in high-energy collisions [154].…”

Section: Critical-like Behaviormentioning

confidence: 94%

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On the foundations of statistical mechanics

Tsallis

2017

Eur. Phys. J. Spec. Top.

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We briefly review the foundations and applications of statistical mechanics based on the nonadditive entropies S q. Then we address four frequently focused points, namely (i) On the form of the constraints within a variational entropy principle; (ii) Are the q-indices first-principle-computable quantities or fitting parameters?; (iii) If one admits violation of the entropic additivity, why not admitting also violation of the entropic extensivity?; and (iv) Critical-like behavior.

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Section: Critical-like Behaviormentioning

confidence: 94%

“…3. The (q, βq) pairs that are represented here have been taken from the q-exponential cumulative probability function of the interarrival times during six cement-mortar loading cycles [153].…”

Section: Critical-like Behaviormentioning

confidence: 99%

On the foundations of statistical mechanics

Tsallis

2017

Eur. Phys. J. Spec. Top.

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“…[36], where q-index was calculated in successive stages of the test, as the specimens approached failure, and was found to decrease, due to the different associated fracture mechanisms. More recently, NESP analysis was conducted at inter-event times of AE during repetitive loading/unloading cycles of cement mortar beams subjected to 3-point bending [37]. The experimental data were fitted by a q-exponential function; the entropic index q was found to increase in each repeated cycle, approaching a critical value (q=1.42) when the specimen reached ultimate failure.…”

Section: Non-extensive Statistical Analysis Of Acoustic Emissionsmentioning

confidence: 99%

The use of acoustic emissions technique in the monitoring of fracturing in concrete using soundless chemical demolition agent

Saltas

Peraki

Vallianatos

2019

Frattura Ed Integrità Strutturale

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Soundless chemical demolition agents (SCDAs) have been used during the last decades in the demolition of boulders and concrete structures as well as in open-surface and sub-surface rock excavation, as an alternative to the use of explosives posing safety risks. However, the knowledge of the governing fracture mechanisms in brittle materials is rather limited. In the present work, we thoroughly investigate the use of the acoustic emission technique to study the SCDA-induced fracture process in concrete blocks. Energy-related features and waveform parameters of the recorded AE activity are correlated to the fracture mode of the concrete where a quasi-static behavior is observed. Monitoring of the progressive fracture is also achieved by the 3D localization of the AE sources. The distribution of the inter-event times of the recorded hits is further analyzed in the context of non-extensive statistical physics.

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“…The existence of the Kaiser effect was demonstrated through repetitive loading and unloading during three-point bending tests. Stavrakas et al 22 Nikolenko and Shkuratnik 23 analyzed AE signals of composite supporting materials, obtained insight into memory effects, and put forward future research hotspots regarding the surrounding rock.…”

Section: Introductionmentioning

confidence: 99%

Damage and fractal evolution trends of sandstones under constant-amplitude and tiered cyclic loading and unloading based on acoustic emission

Liang

Zhang

Xie

et al. 2019

International Journal of Distributed Sensor Networks

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It is of significance to study the damage and destruction of rock under cyclic loading in geotechnical engineering. We determined the trends in damage evolution of sandstone under constant-amplitude and tiered cyclic loading and unloading under uniaxial compression. The results of the study show that (1) the variation of acoustic-emission events was consistent with the stress curves and 89% of all acoustic-emission events occurred during the cycling stages. The observed Kaiser effect was more notable in tiered cycling. (2) The damage variable increased sharply in the cycling stages and its increment was 0.07 higher for tiered cycling than constant-amplitude cycling. Sandstone exhibited greater damage under tiered cyclic loading and unloading. (3) Equations for the evolution of the damage variable under the two cycle modes were obtained by fitting of experimental data. (4) The fractal dimensions of the constant-amplitude cycle were larger than those of the tiered cycle. The process of damage and destruction presents a trend of reducing fractal dimension. The damage accumulation of sandstone under tiered cycling was faster than under constant-amplitude cycling. These results provide references for damage and early warning of rock under both constant-amplitude and tiered cyclic loading and unloading.

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Acoustic Emission Analysis of Cement Mortar Specimens During Three Point Bending Tests

Cited by 31 publications

References 30 publications

On the foundations of statistical mechanics

On the foundations of statistical mechanics

The use of acoustic emissions technique in the monitoring of fracturing in concrete using soundless chemical demolition agent

Damage and fractal evolution trends of sandstones under constant-amplitude and tiered cyclic loading and unloading based on acoustic emission

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