Reliable onset time determination and source location of acoustic emissions in concrete structures

Carpinteri, Alberto; Xu, Jie; Lacidogna, Giuseppe; Manuello, A.

doi:10.1016/j.cemconcomp.2011.11.013

Cited by 165 publications

(88 citation statements)

References 21 publications

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“…The active actuation unit was changed from S 0 configuration to A 0 configuration when the desired dominant mode was changed from S 0 to A 0 . The Time-of-Flight (TOF) between the actuator and each sensor was extracted through the onset times of the acquired signals picked according to the Akaike Information Criterion (AIC) [21,22]. This algorithm uses a function which is computed for each sample point of the selected interval as an autoregressive process between data and noise.…”

Section: Tablementioning

confidence: 99%

Detection of multiple low-energy impact damage in composite plates using Lamb wave techniques

Ochôa

Infante

Silva

et al. 2015

Composites Part B: Engineering

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Section: Tablementioning

confidence: 99%

Detection of multiple low-energy impact damage in composite plates using Lamb wave techniques

Ochôa

Infante

Silva

et al. 2015

Composites Part B: Engineering

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“…The information obtained by AE can be used to reflect the cracks' location and the propagation behaviors. So far, AE technique has been widely applied to study the cracking behaviors and mechanism in many researches (Lei et al 1992;Lockner 1993;Pettitt 1998;Cai et al 2001;Landis and Baillon 2002;Colombo et al 2003;Schiavi et al 2011;Carpinteri et al 2012). Li et al (2005) performed an experimental study on the acoustic emission behavior of pre-cracked marble samples, suggesting that AE counts increased rapidly near failure which accounted for nearly half of the total during the whole cracking process.…”

Section: Introductionmentioning

confidence: 99%

The role of flaws on crack growth in rock-like material assessed by AE technique

Liu

et al. 2015

Int J Fract

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Experiments for the rectangular rock-like samples (made of high-strength gypsum and watercement ratio is 1) with two parallel pre-existing flaws subjected to uniaxial compression were carried out to further investigate the influence of varying flaw geometries on mechanical properties and crack coalescence behaviors. According to the tests results, eight crack types were characterized on a basis of the mechanisms of crack nucleation, formation and propagation, and seven coalescence modes occurred through the ligament, including S-mode, M1-mode, M2-mode, M3-mode, T1-mode, T2-mode and T3-mode. The AE and photographic monitoring techniques were adopted to further clarify the procedure of the crack coalescence and failure during uniaxial compression tests and in consequence the whole process of crack emergence, growth, coalescence and failure was recorded in real time. The results of AE technique revealed that the characteristics of acoustic emission energy associate with crack coalescence modes, and AE location method can emphasize the moments of crack occurrences and follow the crack growth until final failure. This study put forward better understanding of the fracture and failure mechanism of underground rock engineering, like rock burst.

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“…In this way, we can preliminarily distinguish between environmental contributions due to crustal trembling (external source) and structural damage contributions (inner sources localized by means of triangulation techniques [18]). Then, by applying the modified Grassberger-Procaccia correlation integral to the remaining AE data series and to the earthquake sequence, we obtained the …”

Section: Space-time Correlation Between Ae and Seismic Eventsmentioning

confidence: 99%

Correlation between Earthquakes and AE Monitoring of Historical Buildings in Seismic Areas

et al. 2015

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Abstract:In this contribution a new method for evaluating seismic risk in regional areas based on the acoustic emission (AE) technique is proposed. Most earthquakes have precursors, i.e., phenomena of changes in the Earth's physical-chemical properties that take place prior to an earthquake. Acoustic emissions in materials and earthquakes in the Earth's crust, despite the fact that they take place on very different scales, are very similar phenomena; both are caused by a release of elastic energy from a source located in a medium. For the AE monitoring, two important constructions of Italian cultural heritage are considered: the chapel of the "Sacred Mountain of Varallo" and the "Asinelli Tower" of Bologna. They were monitored during earthquake sequences in their relative areas. By using the Grassberger-Procaccia algorithm, a statistical method of analysis was developed that detects AEs as earthquake precursors or aftershocks. Under certain conditions it was observed that AEs precede earthquakes. These considerations reinforce the idea that the AE monitoring can be considered an effective tool for earthquake risk evaluation. OPEN ACCESSAppl. Sci. 2015Sci. , 5 1684

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Reliable onset time determination and source location of acoustic emissions in concrete structures

Cited by 165 publications

References 21 publications

Detection of multiple low-energy impact damage in composite plates using Lamb wave techniques

Detection of multiple low-energy impact damage in composite plates using Lamb wave techniques

The role of flaws on crack growth in rock-like material assessed by AE technique

Correlation between Earthquakes and AE Monitoring of Historical Buildings in Seismic Areas

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