Cracking and crackling in concrete-like materials: A dynamic energy balance

Carpinteri, Alberto; Lacidogna, Giuseppe; Corrado, Mauro; Battista, E. Di

doi:10.1016/j.engfracmech.2016.01.013

Cited by 127 publications

(68 citation statements)

References 35 publications

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“…The proposed comparisons between the dissipated and emitted energies for three different specimen sizes-carried out both in terms of their cumulative values at the end of the tests and of the evolution of their rates during the loading process-suggest that there is no direct proportionality between them. 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: 99%

“…In a recent paper [7], the AE parameters acquired during three-point bending (TPB) tests on notched concrete beams and a compression test on a cylindrical specimen were analyzed. These analyses were performed in order to identify the dominant fracture mode and to investigate the evolution of the released, dissipated, and emitted energies during the test and their mutual correlations.…”

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

confidence: 99%

“…A is the amplitude and RT is the rise time (time between the onset and the point of maximum amplitude) of the waveforms. Reproduced with permission from [7], Elsevier, 2016.…”

Section: Dissipated and Emitted Energiesmentioning

confidence: 99%

“…This emitted energy can be detected by the AE sensors and can be used as a damage indicator. The total released energy, R, is the summation of the two previous areas: D + E = R. Reproduced with permission from [7], Elsevier, 2016.…”

Section: Dissipated and Emitted Energiesmentioning

confidence: 99%

“…The damage mechanisms were characterized considering the AE signals obtained during the tests by increasing the vertical deflection of the sample. In particular, the dominant fracture mode was identified, and the correlations between dissipated and emitted energies were investigated [7]. Moreover, the variations of the first three natural bending frequencies, produced by the crack advancement under loading, were detected and correlated with the cumulated AE energy.…”

Section: Introductionmentioning

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

confidence: 99%

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

confidence: 99%

“…A is the amplitude and RT is the rise time (time between the onset and the point of maximum amplitude) of the waveforms. Reproduced with permission from [7], Elsevier, 2016.…”

Section: Dissipated and Emitted Energiesmentioning

confidence: 99%

Section: Dissipated and Emitted Energiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2017

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Numerical simulation of acoustic emission during crack growth in 3-point bending test

Berezovski

2017

Struct Control Health Monit

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Acoustic emission behavior and damage evaluation of recycled aggregate concrete under compression

Men

Jia-chen

Guo

et al. 2020

Struct Control Health Monit

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Summary Application of recycled coarse aggregate concrete (RAC) will generate considerable environmental benefits. However, the properties of RAC must be studied before being adopted in structures. In this research, the failure process and damage assessment of RAC under compression were investigated by applying acoustic emission (AE) technology. The variables include loading rates, maximum coarse aggregate sizes, and water–cement ratios (w/c). Meanwhile, an innovative approach called stage cumulative proportion (SCP) analysis of AE result was put forward. Subsequently, the damage of RAC under compression was evaluated based on the rate process theory. The results demonstrated that void compaction and original crack expansion occurred first in the test and then the stable microcracking in interfacial transition zone (ITZ) and unstable cracking in mortar, and finally, there is the macrocrack expansion followed by the fracture. It was found that AE counts and energy were mainly produced before the peak stress was reached. The increase in loading rate caused the AE counts and energy to increase in stable microcracking of ITZ but decreased in unstable cracking of mortar. Increasing the w/c would also affect the AE results in these stages, but the effect was the opposite to the loading rate. Besides, an increase in coarse aggregate sizes would increase the AE counts and energy in unstable cracking of mortar and decrease in macrocrack expansion. In addition, a polynomial expression of the relationship between AE parameters and stress level was established. Then, an evaluation criterion was proposed based on the expressions and the rate process theory.

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Cracking and crackling in concrete-like materials: A dynamic energy balance

Cited by 127 publications

References 35 publications

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

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

Numerical simulation of acoustic emission during crack growth in 3-point bending test

Acoustic emission behavior and damage evaluation of recycled aggregate concrete under compression

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