Topic
Acoustic emission
About: Acoustic emission is a research topic. Over the lifetime, 16293 publications have been published within this topic receiving 211456 citations.
Papers published on a yearly basis
Papers
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TL;DR: In this paper, an unsupervised neural network based classification technique successfully separated two damage mechanisms related to matrix cracking and delamination in carbon fiber laminates, and the results obtained allowed a more detailed understanding of such sources of acoustic emissions in carbon fibres.
Abstract: Background
The use of Acoustic Emission (AE) as a Structural Health Monitoring (SHM) technique is very attractive thanks to its ability to detect not only damage sources in real-time but also to locate them.
Methods
To demonstrate the AE capabilities on known damage modes, a carbon fibre panel was manufactured with cut fibres in a central location and subjected to fatigue loading to promote matrix cracking. Subsequently, a delamination was created within the panel using an impact load, and the test was continued.
Results
AE signals were located within the crack area in the first part of the test. After impact, AE signals were detected from both areas under fatigue loading; signals from this area were located and used for further analysis with the neural network technique.
Conclusions
The application of an unsupervised neural network based classification technique successfully separated two damage mechanisms, related to matrix cracking and delamination. The results obtained allowed a more detailed understanding of such sources of AE in carbon fibre laminates.
72 citations
TL;DR: In this article, a Paris law type relationship exists between the rate of increase of acoustic emission count per cycle and the stress intensity factor range, and different stages of fatigue fracture is explained.
72 citations
TL;DR: In this article, a series of uniaxial compression tests were conducted on non-persistently jointed rock specimens with double circular holes and the results indicated that the existence of nonpersistent joints has a significant influence on the strength characteristics of the specimens.
72 citations
TL;DR: In this paper, the impacts of freeze-thaw (F-T) fatigue damage on the crack coalescence behaviors at the rock bridge segment for granite samples containing two unparallel flaws.
72 citations
TL;DR: In this article, three signal processing techniques including an adaptive filter, spectral kurtosis and envelope analysis were applied to AE and vibration data acquired from a simplified planetary gearbox test rig with a seeded bearing defect.
71 citations