Structural damage localisation by acoustic emission technique: A state of the art review

Sengupta, Sharmila; Datta, Asoke Kumar; Topdar, Pijush

doi:10.1590/1679-78251722

Cited by 44 publications

(21 citation statements)

References 39 publications

(37 reference statements)

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“…This technique utilizes the detection of transient elastic waves caused by plastic deformation or cracks propagation during the increasing load or material deterioration. Piezoelectric AE transducers can detect the micro-vibration on the surface of material and convert it into a usable electric signal, called AE signal (Sengupta et al, 2015). AE signal contains useful information on the material damages, the location, mechanism, and severity of the AE source can be assessed by analysis of the resultant waveform.…”

Section: Introductionmentioning

confidence: 99%

Damage evaluation and failure mechanism analysis of steel tube confined reinforced-concrete columns by acoustic emission technology

Pan

2018

Lat. Am. j. solids struct.

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As a new kind of composite structures and its advantages, the using of steel tube confined reinforced concrete (STCRC) columns have received increasing attention in civil engineering. Acoustic emission (AE) technique is applied to monitor the damage process of STCRC columns during an uniaxial compression test. The aim of this study is to investigate the damage evaluation and failure mechanisms of the STCRC columns from the perspective of microscopic damage. Typical AE parameters are extracted to quantify different damage condition and identify the critical point. Peak-frequency analysis classify the damage signal into groups, representing different AE generation mechanisms. Extended AE features, such as the RA value and the average frequency are calculated to discriminate the cracking modes of core concrete. The probability based Gaussian mixture model (GMM) are proposed for unsupervised damage pattern recognition. All presented AE results are good in accordance with the observed experimental outcomes. The AE technology enabled evaluating the damage condition, identifying critical point, disclosing the failure mechanism, and classifying damage modes for steel confined RC columns effectively.

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Section: Introductionmentioning

confidence: 99%

Damage evaluation and failure mechanism analysis of steel tube confined reinforced-concrete columns by acoustic emission technology

Pan

2018

Lat. Am. j. solids struct.

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“…Acoustic emission patterns associated with elastic impact are detailed in [6,7]. However, as related to the detection of emerging defects, acoustic emission, which accompanies crack propagation processes after damping of oscillations, is of more practical interest.…”

Section: Introductionmentioning

confidence: 99%

Dynamic loading in monitoring of brittle objects by acoustic emission method

Popkov

Kochetkov

2018

MATEC Web Conf.

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Acoustic emission monitoring requires applying a force to an object. In most cases, special-purpose loading devices are used for this process; however, they are subject to some operational limitations. Dynamic loading of a controlled object makes it unnecessary to use loading devices and put the object out of operation. The purpose of the study is to develop a technique of acoustic emission monitoring under dynamic loading. The paper describes results of experiments with impact loading of a glass sheet with a crack. It proposes a method for separating the total flow of acoustic emission signals into stationary groups that are typical for different acoustic emission sources.

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“…A big part of the predictive maintenance in the field is done with acoustic emissions (AE) on the surface of the wind turbine blades. Some of the methods rely on capturing the waves in the failure moment, which might be generated by an impact, yield, crack, or other events (Sengupta et al, 2015). In this method, it is possible to perform the predictive maintenance only with receptor sensors, without the need of actuators.…”

Section: Introductionmentioning

confidence: 99%

“…The group velocity is the atribute that is normally used for TOF based LW-SHM, because it is the velocity of the modulation of the wave, which contains the wave packet energy. As pointed out by Sengupta et al (2015), there is a lack of studies regarding the effect of geometry on the Lamb Wave behaviour. Most of the studies are done for flat plates, including the work of Qiu et al (2013), they do not address the effect of high curvature in the Lamb waves and, more importantly, in the group velocities.…”

Section: Introductionmentioning

confidence: 99%

Finite element evaluation of the effects of curvature in Lamb waves for composites structural health monitoring

Santana

Malekan

Araújo

et al. 2018

Lat. Am. j. solids struct.

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This work presents the effect of the high curvature to thickness ratio on the characteristics of Lamb Waves propagating over the skins of composite structures. It is accessed how the curvature on composite skins affects the group velocity of the symmetrical (S0) and asymmetrical (A0) wave modes. It is also accessed the gradient of curvature effect, when the wave propagates from a flat to a curved part on the skin. The results are intended to be used for the improvement of structural health monitoring of wings and wind turbine blades. This is accomplished through dynamic explicit linear finite element method simulations of plates with flat and curved parts made of Eglass-epoxy bidirectional laminate. As the skin structures are often designed to withstand torsional loads, the fibers are aligned with 45 degrees from the leading edge (curved region) throughout the analysis. Several skins with different curvature to thickness ratios are generated and simulated. Results and trends are presented and can be used to improve the algorithms for damage detection on those structures. It is shown that the group velocity of the incoming waves change considerably with the presence of curvature, for both main modes of vibration.

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Structural damage localisation by acoustic emission technique: A state of the art review

Cited by 44 publications

References 39 publications

Damage evaluation and failure mechanism analysis of steel tube confined reinforced-concrete columns by acoustic emission technology

Damage evaluation and failure mechanism analysis of steel tube confined reinforced-concrete columns by acoustic emission technology

Dynamic loading in monitoring of brittle objects by acoustic emission method

Finite element evaluation of the effects of curvature in Lamb waves for composites structural health monitoring

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