Investigation of Acoustic Emission During Fatigue Loading of Composite Specimens

Williams, Ralph E.; Reifsnider, KL

doi:10.1177/002199837400800403

Cited by 43 publications

(17 citation statements)

References 5 publications

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“…Williams and Reifsnider (1974) showed that the AE rate generally correlated with the rate of stiffness reduction due to damage. Numerous attempts to identify sources of the AE signals in composites were made.…”

Section: Acoustic Emission Analysis Of Damage Mechanismsmentioning

confidence: 96%

“…Parametric AE analysis was used to evaluate overall damage accumulation in composites by Williams and Reifsnider (1974), Awerbuch and Ghaffari (1988), Bakuckas et al (1994), Ely and Hill (1995), Luo et al (1995), and Shiwa et al (1996). Williams and Reifsnider (1974) showed that the AE rate generally correlated with the rate of stiffness reduction due to damage.…”

Section: Acoustic Emission Analysis Of Damage Mechanismsmentioning

confidence: 99%

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Analysis of microdamage evolution histories in composites

Dzenis

Qian

2001

International Journal of Solids and Structures

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Evolution of microdamage in advanced composites was experimentally studied in this paper. A new method of acoustic emission (AE) analysis of histories of different damage mechanisms was formulated based on a combination of transient AE classification and multiparameter filtering. The capabilities of the method were illustrated on examples of damage evolution in several graphite/epoxy composites. Three characteristic AE waveforms with different frequency spectra were identified based on the transient analysis. Regions occupied by these waveforms in the amplitude-rise time parametric space were identified for the [0] 8 and [90] 16 unidirectional composites. Multiparameter filtering was applied to extract evolution histories for the characteristic waveforms. The results were compared with actual damage in the specimens and the three characteristic AE waveforms were associated with matrix cracks, fiber breaks, and "macrodamage," such as delaminations or longitudinal splitting in unidirectional plies. The multiparameter filters based on the analysis of the unidirectional composites were used to extract the damage evolution histories for the cross-ply [0/90] 3S and angle-ply [±45] 4S composites. The results compared favorably with the observed damage in these materials. An inverse analysis of the quality of the multiparameter filtering for the laminated composites indicated that the filters developed for unidirectional composites can be applied to the analysis of laminated composites with reasonable reliability. The new method of acoustic emission analysis of damage micromechanisms is expected to be especially advantageous for fatigue damage evolution studies in composites and structures.

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Section: Acoustic Emission Analysis Of Damage Mechanismsmentioning

confidence: 96%

Section: Acoustic Emission Analysis Of Damage Mechanismsmentioning

confidence: 99%

Analysis of microdamage evolution histories in composites

Dzenis

Qian

2001

International Journal of Solids and Structures

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“…Acoustic emission was monitored during strain and load controlled fatigue tests of angle-plied boron/aluminum and boron/epoxy [16]. AE results were correlated with dynamic compliance and the study concluded that a good correlation could be established between the amount of AE and amount of damage, as well as between rate of emission and rate of damage development.…”

mentioning

confidence: 95%

“…Monitoring of AE during fatigue loading of composites has been investigated in [15][16][17][18][19][20]. Acoustic emission was monitored during strain and load controlled fatigue tests of angle-plied boron/aluminum and boron/epoxy [16].…”

mentioning

confidence: 99%

“…In order to eliminate emission generated by fretting (friction) when significant delamination has developed, the AE signal can be gated so that emission is recorded "only during the top half of the loading cycles". The use of such a gating technique can result in a better agreement between the amount and rate of emission and the extent and rate of overall damage [16].…”

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confidence: 99%

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Detection of failure progression in cross-ply graphite/epoxy during fatigue through acoustic emission. Volume 1

Awerbuch¹,

Eckles²,

Erdman³

1992

NDT & E International

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Schallemissionsuntersuchungen an polymeren Verbundwerkstoffen. Teil II: Experimentelle Ergebnisse

Bardenheier

1980

Materialwissenschaft Werkst

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Teil 11: Experimentelle Ergebnisse Reinhard BardenheierDas quasi-zerstorungsfreie Werkstoffprufverfahren der Schallemissionsmessung und dessen Anwendung bei polymeren Verhundwerkstoffen wird beschrieben. Dieses Verfahren ermoglicht es, das Entstehen und das Verhalten von Werkstoffdefekten bei untcrschiedlichen Lasteinwirkungen anzuzeigen. Mittels signalbewertender Analysenmethoden konncn die in Verbundwerkstoffen ahlaufenden, unterschiedlichen Versagensmechanismen differenziert werden. Bei Bauteiluntersuchungen erweist sich das SchallemissionsmeRverfahren als aul3erordentlich sensitiv, um bauteilgefahrdende Defekte und Werkstoffehler anzuzeigen. Acoustic Emission Monitoring of Polymeric Composite MaterialsPart 11: Experimental resultsThe technique of acoustic emission monitoring of polymeric composite materials is described. It is a high sensitive, quasi-nondestructive testing method that indicates the origin and the behaviour of flaws in such materials, when submitted to different load histories. In the usage of sophisticated signal-analysis-methods it is possible to distinguish between different types of failure mechanisms, such as fiber fracture, delamination or fiber pull-out. Imperfections can be detected while monitoring complex composite structures by acoustic emission measurements.

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Investigation of Acoustic Emission During Fatigue Loading of Composite Specimens

Cited by 43 publications

References 5 publications

Analysis of microdamage evolution histories in composites

Analysis of microdamage evolution histories in composites

Detection of failure progression in cross-ply graphite/epoxy during fatigue through acoustic emission. Volume 1

Schallemissionsuntersuchungen an polymeren Verbundwerkstoffen. Teil II: Experimentelle Ergebnisse

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