Heterogeneous materials in compression: Correlations between absorbed, released and acoustic emission energies

Carpinteri, Alberto; Corrado, Mauro; Lacidogna, Giuseppe

doi:10.1016/j.engfailanal.2013.05.016

Cited by 96 publications

(35 citation statements)

References 19 publications

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“…The peak of RT distribution is nearly the same for bending and shear while the averages are much closer. This is in accordance to literature that states that after the fracture is initiated and close to final failure, it follows a pattern "independent of the actual failure mechanism" and the energy dissipation is "a surface-dominated phenomenon, analogously to the tensile behavior" [11]. Therefore, it comes in agreement with the fact that most of the differences, are seen in the early behavior, while later failure (even if it comes from the modified "shear" test) resembles tensile behavior, and thus exhibits lower RT values during high load.…”

Section: Testing Of Granitesupporting

confidence: 92%

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Fracture monitoring by acoustic emission: recent applications of parameter-based characterization

Aggelis

Blom²,

Sutter

et al. 2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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The present paper describes a collection of fracture monitoring cases in different materials. The cases examined include bending of textile reinforced cement (TRC), hybrid concrete-TRC lightweight beams, granite, additive manufacturing metal components, combined loading of human femur bone and pull-out in reinforced concrete. In all cases the basic role is played by acoustic emission (AE). It is shown that certain waveform parameters exhibit strong sensitivity to the rate of fracture as well as the dominant fracture mode. Parameters like frequency content and the duration of the signals supply real time trends that in the present cases are verified by optical techniques. It is concluded that AE supplies important information and allows the prediction of how the material will behave based on the initial AE recordings and before serious damage is inflicted. AE shows a very broad application range; however, the contribution of combination with other techniques is highlighted in order to increase the reliability of the interpretation of AE results.

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Section: Testing Of Granitesupporting

confidence: 92%

“…AE has been used for monitoring the fracture and localizing the sources. In most cases in literature the load is compressive and leads to all different fracture events (tensile, shear and mixed-mode) [11,12]. In this case two modes were isolated.…”

Section: Testing Of Granitementioning

confidence: 92%

Fracture monitoring by acoustic emission: recent applications of parameter-based characterization

Aggelis

Blom²,

Sutter

et al. 2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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show abstract

“…In particular, a considerable increase in the fracture energy was evidenced by increasing the specimen size, whereas an opposite trend was obtained for the AE energy per unit surface [7]. According to the interpretation proposed in [25], the AE energy should be correlated to the surplus of elastic energy with respect to the dissipated one that is emitted in correspondence of unstable behaviors.…”

Section: Results From Previous Tpb Tests and Aim Of Present Studymentioning

confidence: 93%

“…However, recent studies carried out by Carpinteri and co-workers focusing on the catastrophic failure of rock specimens in compression have suggested that such a correlation is not always correct [25]. In particular, it was evidenced that a large amount of AE activity takes place during the post-peak snap-back instability.…”

Section: Dissipated and Emitted Energiesmentioning

confidence: 99%

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Acoustic Emission and Modal Frequency Variation in Concrete Specimens under Four-Point Bending

2017

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Abstract:The Acoustic Emission (AE) and Dynamic Identification (DI) techniques were applied simultaneously, in an original way, to examine the stress dependent damage progress in pre-notched concrete beams tested in four-point bending. The damage mechanisms were characterized by analyzing the AE signals registered during the tests, conducted by increasing the specimen's vertical deflection. In particular, the dominant fracture mode was identified, and correlations between dissipated and emitted energies were investigated. Moreover, variations in the natural bending frequencies, produced by the crack advancement under loading, were detected and put in relation with the cumulated AE energy. Two different types of piezoelectric (PZT) sensors, operating in well distinct frequency ranges, were used to measure AE and modal signals. This study may be of interest with an outlook on possible correlations between a multi-parameter structural monitoring and the solution of inverse problems by numerical models.

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Determination of yielding point by means a probabilistic method on acoustic emission signals for application to health monitoring of reinforced concrete structures

Sagar

Kumar

Prasad

et al. 2018

Struct Control Health Monit

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Summary Reinforced concrete (RC) flanged beam specimens were tested under incremental cyclic load till failure in flexure, and simultaneously, the acoustic emission (AE) signals released by the specimens were recorded. To assess damage in RC structures, a previously published index of damage (ID) based on AE signals was used. This index, however, needs to know the yielding point of the specimen. In the present study, yielding point was identified with a probabilistic method known as Gaussian mixture modeling (GMM) applied to the AE signals, as compared with that obtained by means of the plastic strain energy. It was observed that yielding load obtained with both methodologies was almost same, thus validating the GMM method. This result permits to use the ID index for damage monitoring of RC structure in practical scenarios, by using only information hidden in the AE signals. The influence of loading rate, failure type (tensile and shear), RC beam depth, concrete compressive strength, and percentage of tensile steel reinforcement on ID were studied in this work.

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Heterogeneous materials in compression: Correlations between absorbed, released and acoustic emission energies

Cited by 96 publications

References 19 publications

Fracture monitoring by acoustic emission: recent applications of parameter-based characterization

Fracture monitoring by acoustic emission: recent applications of parameter-based characterization

Acoustic Emission and Modal Frequency Variation in Concrete Specimens under Four-Point Bending

Determination of yielding point by means a probabilistic method on acoustic emission signals for application to health monitoring of reinforced concrete structures

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