A new method for detecting fatigue crack initiation in aluminum alloy using acoustic emission waveform information entropy

•Information entropy of AE signals used as precursors to fatigue crack initiation.•Minimum AE entropy precedes crack initiation correlates with crack nucleation.•Minimum entropy value falls in a short interval independent of loading condition.•Following the minimum entropy, cumulative information en...

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Bibliographic Details
Published in:Engineering fracture mechanics 2020-01, Vol.223, p.106771, Article 106771
Main Authors: Karimian, Seyed Fouad, Modarres, Mohammad, Bruck, Hugh A.
Format: Article
Language:English
Subjects:
Acoustic emission
Acoustic fatigue
Airframes
Aluminum base alloys
Catastrophic failure analysis
Coalescing
Crack initiation
Crack propagation
Entropy (Information theory)
Fatigue
Fatigue cracks
Fatigue failure
Fatigue tests
Fracture mechanics
Information entropy
Inspection
Microcracks
Nucleation
Structural health monitoring
Waveforms
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