Potential of acoustic emissions from three point bending tests as rock failure precursors

Agioutantis, Z.; Kaklis, K.; Mavrigiannakis, S.; Verigakis, M.; Vallianatos, Filippos; Saltas, V.

doi:10.1016/j.ijmst.2015.11.024

Cited by 61 publications

(25 citation statements)

References 12 publications

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“…The knee points are observed when strain equals about 50-60% of the fracture strain for all three materials studied here (while the stress level equals about 70-80% for marble specimens and about 55-65% for mortar and soda glass specimens). AE technique has already been mentioned as a valuable tool for detecting the impending failure paying attention either to the general acoustic activity or to specific acoustic characteristics in accordance mainly to the stress induced on the specimens [18][19][35][36]. PSC technique is more recently developed compared to the AE technique and it is not yet fully standardized.…”

Section: Discussionmentioning

confidence: 99%

Correlation between the electric and acoustic signals emitted during compression of brittle materials

Pasiou¹,

Triantis²

2017

Frattura Ed Integrità Strutturale

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ABSTRACT. An experimental protocol is described including a series of uniaxial compression tests of three brittle materials (marble, mortar and glass). The Acoustic Emission (AE) technique and the Pressure Stimulated Currents (PSC) one are used since the recordings of both techniques are strongly related to the formation of cracking in brittle materials. In the present paper, the correlation of these techniques is investigated, which is finally proven to be very satisfactory.

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Section: Discussionmentioning

confidence: 99%

Correlation between the electric and acoustic signals emitted during compression of brittle materials

Pasiou¹,

Triantis²

2017

Frattura Ed Integrità Strutturale

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“…the high-frequency transient elastic waves originating from the sudden release of energy at localized points within a loaded material (Nomikos et al, 2010), can provide information on the occurrence of microcracks within the rock, that may signal progression of rock damaging, crack coalescence, deformations, and incipient failure (e.g. Manthei and Eisenblätter, 2008;Agioutantis et al, 2016). Such techniques, combined with hydrological monitoring, would be extremely valuable for setting up early warning systems and help the authorities to take informed decisions on possible evacuation or relocation of the exposed people.…”

Section: Open Discussion: the Lesson Of A Killer Landslidementioning

confidence: 99%

Brief communication: Post-seismic landslides, the tough lesson of a catastrophe

Fan

Scaringi

2018

Nat. Hazards Earth Syst. Sci.

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Abstract. The rock avalanche that destroyed the village of Xinmo in Sichuan, China, on 24 June 2017, brought the issue of landslide risk and disaster chain management in highly seismic regions back into the spotlight. The long-term postseismic behaviour of mountain slopes is complex and hardly predictable. Nevertheless, the integrated use of field monitoring, remote sensing and real-time predictive modelling can help to set up effective early warning systems, provide timely alarms, optimize rescue operations, and perform secondary hazard assessments. We believe that a comprehensive discussion on post-seismic slope stability and on its implications for policy makers can no longer be postponed.

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“…The use of 7 sensors in the monitoring test has enabled the determination of the location of AE sources. The principle of AE source localization is based on the minimization of the following quantity, chi square (χ 2 ), by using multiple regression analysis [22,23]:…”

Section: A Parameter-based 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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Potential of acoustic emissions from three point bending tests as rock failure precursors

Cited by 61 publications

References 12 publications

Correlation between the electric and acoustic signals emitted during compression of brittle materials

Correlation between the electric and acoustic signals emitted during compression of brittle materials

Brief communication: Post-seismic landslides, the tough lesson of a catastrophe

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

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