Acoustic emission energy relates to bond strength

Curtis, G.J.

doi:10.1016/0029-1021(75)90045-6

Cited by 24 publications

(3 citation statements)

References 4 publications

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“…AE energy (ENE) is another important parameter expressing the measure of the area under the rectified signal envelope (MARSE). It is reasonable to suggest that the energy in the acoustic waveform is proportional to the energy of the associated deformation (Curtis, 1975) and is presented in dimensionless form (Philippidis et al, 1999). It expresses the severity of an event since large crack propagation incidences will emit larger amount of energy than micro-cracks.…”

Section: Introductionmentioning

confidence: 99%

Classification of cracking mode in concrete by acoustic emission parameters

Aggelis

2011

Mechanics Research Communications

626

226

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Section: Introductionmentioning

confidence: 99%

Classification of cracking mode in concrete by acoustic emission parameters

Aggelis

2011

Mechanics Research Communications

626

226

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“…One technique which avoids this issue is acoustic emission. Acoustic emission (AE) has proven promising for condition monitoring of large structures and has been shown to be effective in detecting failure of adhesive joints [3][4][5][6][7][8][9]. AE is a passive technique based on the detection of transient elastic waves released by the sudden redistribution of stress resulting from processes such as crack initiation and growth.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Acoustic Emission Propagation in Metal-to-Metal Adhesively Bonded Joints

2018

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Acoustic emission (AE) monitoring shows promise as one of the most effective methods for condition monitoring of adhesively-bonded joints. Previous research has demonstrated its ability to detect, locate and classify adhesive joint failure, though in these studies little attention appears to have been paid to the differences in AE wave propagation through the bonded and un-bonded sections of the specimens tested, or to the effects of the wave modes excited or the propagation distances. This paper details an experimental study conducted on large aluminium sheet specimens to identify the effects of the presence of an adhesive layer on AE wave propagation. Three specimens are considered; a single aluminium sheet, two aluminium sheets placed together without adhesive, and an adhesively-bonded specimen. A pencil lead break (PLB) is used as a simulated AE source, and is applied to the three specimens at varying propagation distances and orientations. The acquired signals are processed using wavelet-transforms to explore time-frequency features, and compared with modified group-velocity curves based on the Rayleigh-Lamb equations to allow identification of wave-modes and edge-reflections. The effects of propagation distance and source orientation are investigated while comparison is made between the three specimens. It is concluded that while the wave propagation modes can be approximated as being constant throughout all three specimens, there is a significant change in the received waveforms due to the attenuation of high-frequency components exhibited by the bonded specimen. These findings may be utilised to provide a deeper understanding of acquired AE data, improving the current abilities to identify, locate and characterise damage mechanisms occurring within adhesive joints, ultimately improving safety in the use of adhesive bonding for critical applications.

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“…It is assumed that for both types of films, the work of adhesion is much more significant. When a material undergoes deformation or fracture, some of the elastic energy induced by the local stresses can be released in the form of stress waves, [30][31][32][33] which produce small displacements that can be detected on the surface by a sensor. One theory for metals is that stress waves are generated from expanding plastic zones--the small area at the tip of a crack that undergoes plastic deformation as a result of stress concentration.…”

Section: Introduction 23mentioning

confidence: 99%

Analysis of adhesion test methods and the evaluation of their use for ion-beam-mixed metal/ceramic systems

Pawel¹

1988

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Acoustic emission energy relates to bond strength

Cited by 24 publications

References 4 publications

Classification of cracking mode in concrete by acoustic emission parameters

Classification of cracking mode in concrete by acoustic emission parameters

Analysis of Acoustic Emission Propagation in Metal-to-Metal Adhesively Bonded Joints

Analysis of adhesion test methods and the evaluation of their use for ion-beam-mixed metal/ceramic systems

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