Detection of fatigue crack growth by acoustic emission techniques

Dunegan, H.L.; Harris, David O.; Teleman, A.S.

doi:10.1016/0041-624x(71)90172-7

Cited by 9 publications

(13 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…(2) AE does not reveal any periodicity in appearance of transient signals associated with brittle fracture due to fatigue crack advance. The latter occurs typically at the maximum cyclic load [1,2]. The AE stream is formed by continuous-like signals, thus making it impossible to use any traditional hit detection approach based on an amplitude threshold.…”

Section: Resultsmentioning

confidence: 99%

“…The amplitude of AE transients depends primarily and explicitly on the crack growth rate and the crack orientation relative to the AE transducer, and more implicitly on the stress intensity ahead of the crack tip during loading and the microstructure that controls the local plasticity of the material around the crack [1][2][3]. The AE technique has therefore emerged as a powerful means for the early non-destructive detecting and monitoring of crack initiation and growth under cyclic loading [1,2]. This technique is unique in that it has an excellent temporal and spatial resolution of dynamically evolving defects in solids in real time.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Acoustic Emission Assessment of Impending Fracture in a Cyclically Loading Structural Steel

Растегаев

Danyuk

Afanasyev

et al. 2016

Metals

View full text Add to dashboard Cite

Using the advanced acoustic emission (AE) technique, we address the problem of early identification of crack initiation and growth in ductile structural steels under cyclic loading. The notched 9MnSi5 steel specimens with weld joints were fatigue tested at room and lower temperatures with concurrent AE measurements. Detection of AE in ductile materials where fatigue crack initiation and propagation is mediated by local dislocation behavior ahead of the notch or crack tip is challenging because of an extremely low amplitude of the AE signal. With account of this issue, two new practically oriented criteria for recognition of different stages of fatigue are proposed on the basis of AE data: (1) a power spectrum-based criterion and (2) a pattern recognition-based criterion utilizing modern clustering algorithms. The applicability of both criteria is verified using obtained AE data. A good correspondence between AE outcomes and experimental observations of the fatigue behavior was obtained and is discussed.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Acoustic Emission Assessment of Impending Fracture in a Cyclically Loading Structural Steel

Растегаев

Danyuk

Afanasyev

et al. 2016

Metals

View full text Add to dashboard Cite

show abstract

“…Acoustic-emission signals have also been observed during crack closure and have been attributed to crackface rubbing [68]. If, however, suitable precautions are taken the technique can give useful additional information on the initiation and growth of cracks [69].…”

Section: Materials Testingmentioning

confidence: 97%

“…Acoustic-emission techniques can be extremely sensitive indicators of the onset of fatigue cracking [67][68][69]. The high sensitivity of the technique can lead to problems.…”

Section: Materials Testingmentioning

confidence: 99%

Acoustic emission: its techniques and applications

Dukes¹,

Culpan²

1984

IEE Proc. A Phys. Sci. Meas. Instrum. Manage. Educ. Rev. UK

View full text Add to dashboard Cite

Acoustic emission offers the possibility of inspecting the whole volume of large structures from a limited number of access points. The paper discusses the historical development of the technique and describes the instrumentation and analytical methods used for interpretation. Experience has shown that, contrary to early statements, acoustic emission is not a universal inspection tool and the latter portion of the paper describes applications where the technique does have some chance of success.

show abstract

“…Use of acoustic emission signals has been recommended (31,32,33,34) as a technique to detect cracking in metals.…”

Section: Review Of Literaturementioning

confidence: 99%