Effectiveness of acoustic emission parameters to monitor the crack formation in refractories – Case study on castables of different brittleness

Andreev, Kirill; Naveen, S.; Verstrynge, Els

doi:10.1016/j.jeurceramsoc.2019.08.016

Cited by 12 publications

(3 citation statements)

References 26 publications

(54 reference statements)

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“…However, the current related studies concentrated on materials that have a strength of less than 100 MPa, such as coal and rock-like material. In this article, a b -value analysis could provide an indication of high-strength rock mass [ 50 , 51 , 52 , 53 , 54 ].…”

Section: Discussionmentioning

confidence: 99%

Analysis of Acoustic Emission Characteristics and Failure Mode of Deep Surrounding Rock of Sanshandao Gold Mine

et al. 2022

IJERPH

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In mining engineering, crack distribution has a considerable influence on the mechanical behavior and stability of the surrounding rock mass. Using the granite of the Sanshandao gold mine as experimental samples, the deformation and failure of fractured rock were analyzed based on a rock uniaxial compression test with acoustic emission monitoring. We analyzed the characteristics of different stages of rock sample deformation, and evaluated the failure mode of seven types of rock samples. The results show that the cracks had a considerable impact on rock sample strength and mechanical behavior, and the strength of intact rock was the highest, while that of the sample with parallel double cracks was the lowest. The acoustic emission parameters, AF, RA, and lg(AF/RA), have different change trends in different stages of rock deformation and failure. Based on these change trends, the failure modes of rock samples with different crack distributions were identified. Additionally, for the rock samples with seven types of crack distribution, a sudden or progressive failure caused by the b-value curves was observed. The research findings provide a database for deep surrounding rock stability in the study area and provide suggestions for failure prediction.

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Section: Discussionmentioning

confidence: 99%

Analysis of Acoustic Emission Characteristics and Failure Mode of Deep Surrounding Rock of Sanshandao Gold Mine

et al. 2022

IJERPH

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“…A parameter-based approach uses basic signal characteristics (such as counts, energy or maximum signal amplitude) to deduce information on the fracture process. An overview of AE parameter-based damage assessment approaches was presented by De Smedt et al [29] for high-temperature resistant refractory materials under fatigue loading and by Aggelis for concrete [30]. Parameters such as rise time, signal amplitude and average frequency were studied by Livitsanos et al [31] to distinguish fracture modes in masonry and analyse signal characteristics for different brick and mortar types.…”

Section: Parameter-based and B-value Analysismentioning

confidence: 99%

A review on acoustic emission monitoring for damage detection in masonry structures

Verstrynge

Lacidogna

Accornero

et al. 2021

Construction and Building Materials

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Acoustic emission monitoring is widely used for damage detection in materials research and for site monitoring. Its use for masonry structures is however challenging due to the highly heterogenic nature of masonry and rapid signal attenuation. However, the non-invasive nature and high sensitivity of the technique also provide interesting opportunities, especially for historical masonry structures, to locate damage, identify severity of damage and rate of deterioration. Aim of this paper is to provide an extensive literature review on the application of the acoustic emission technique for masonry structures, addressing specific challenges and recent findings. AE-based methods for damage assessment in masonry are discussed in view of monitoring approaches, wave propagation, source location and crack development under static, fatigue and creep loading. Site applications are discussed for identifying crack location and crack propagation in historical masonry towers, buildings and masonry arch bridges. The paper concludes with future challenges identified in this research field.

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“…AE features have also been analyzed by means of physical considerations in order to evaluate the main damage mechanisms responsible for the detected AE events. Features such as rise time, signal amplitude, and average frequency were studied in different research in order to access the involved fracture created in different brick and mortar types [ 16 , 17 , 18 ]. The severity of damage can be evaluated through the seismology parameter called the b-value.…”

Section: Introductionmentioning

confidence: 99%

Acoustic Emission Monitoring of Progressive Damage of Reinforced Concrete T-Beams under Four-Point Bending

et al. 2022

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Acoustic Emission (AE) is revealed to be highly adapted to monitor materials and structures in materials research and for site monitoring. AE-features can be either analyzed by means of physical considerations (geophysics/seismology) or through their time/frequency waveform characteristics. However, the multitude of definitions related to the different parameters as well as the processing methods makes it necessary to develop a comparative analysis in the case of a heterogeneous material such as civil engineering concrete. This paper aimed to study the micro-cracking behavior of steel fiber-reinforced reinforced concrete T-beams subjected to mechanical tests. For this purpose, four-points bending tests, carried out at different displacement velocities, were performed in the presence of an acoustic emission sensors network. Besides, a comparison between the sensitivity to damage of three definitions corresponding to the b-value parameter was performed and completed by the evolution of the RA-value and average frequency (AF) as a function of loading time. This work also discussed the use of the support-vector machine (SVM) approach to define different damage zones in the load-displacement curve. This work shows the limits of this approach and proposes the use of an unsupervised learning approach to cluster AE data according to physical and time/frequency parameters. The paper ends with a conclusion on the advantages and limitations of the different methods and parameters used in connection with the micro/macro tensile and shear mechanisms involved in concrete cracking for the purpose of in situ monitoring of concrete structures.

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Effectiveness of acoustic emission parameters to monitor the crack formation in refractories – Case study on castables of different brittleness

Cited by 12 publications

References 26 publications

Analysis of Acoustic Emission Characteristics and Failure Mode of Deep Surrounding Rock of Sanshandao Gold Mine

Analysis of Acoustic Emission Characteristics and Failure Mode of Deep Surrounding Rock of Sanshandao Gold Mine

A review on acoustic emission monitoring for damage detection in masonry structures

Acoustic Emission Monitoring of Progressive Damage of Reinforced Concrete T-Beams under Four-Point Bending

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