Sensors for monitoring early stage fatigue cracking

Papazian, John M.; Nardiello, Jerrell A.; Silberstein, R. P.; Welsh, Greg; Grundy, David; Craven, Chris; Evans, L. F.; Goldfine, Neil; Michaels, Jennifer E.; Michaels, Thomas E.; Li, Yuanfeng; Laird, C.

doi:10.1016/j.ijfatigue.2007.01.023

Cited by 59 publications

(31 citation statements)

References 10 publications

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“…Tohmyoh et al (2001) detected the fatigue crack initiation of a test piece with a surface slit during rotating bending tests using surface SH (shear-horizontal) waves. Papazian et al (2007) and Zilberstein et al (2001Zilberstein et al ( , 2003Zilberstein et al ( , 2005 performed many studies on the application of a meandering winding magnetometer array sensor, ultrasonic techniques and an electrochemical fatigue sensor for the detection of crack initiation for many different types of fatigue test pieces. In addition to the above-mentioned methods, since the ion-sputtered film is very thin, a very short crack can change the electric resistance of the ion-sputtered film; thus, the ion-sputtered film would be practical for detecting the instant of fatigue crack initiation during a fatigue test.…”

Section: Fatigue Crack Initiation Detection Methods Using Ion-sputterementioning

confidence: 99%

Practical Methods for Crack Length Measurement and Fatigue Crack Initiation Detection Using Ion-Sputtered Film and Crack Growth Characteristics in Glass and Ceramics

Deng¹,

Nakanishi²

2011

Advances in Ceramics - Characterization, Raw Materials, Processing, Properties, Degradation and Healing

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Section: Fatigue Crack Initiation Detection Methods Using Ion-sputterementioning

confidence: 99%

Practical Methods for Crack Length Measurement and Fatigue Crack Initiation Detection Using Ion-Sputtered Film and Crack Growth Characteristics in Glass and Ceramics

Deng¹,

Nakanishi²

2011

Advances in Ceramics - Characterization, Raw Materials, Processing, Properties, Degradation and Healing

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“…For the aircraft industry a requirement exists for the nondestructive inspection and 4 monitoring of these structures to detect fatigue cracks before they have reached a critical length 5 and different nondestructive methods and sensors have been developed [1]. Ultrasonic bulk 6 waves have the required sensitivity for the detection and sizing of cracks [2] and can be 7 employed for in-situ monitoring of fastener hole cracks using an angle beam through 8 transmission technique [3].…”

Section: Introductionmentioning

confidence: 99%

Analysis of high frequency guided wave scattering at a fastener hole with a view to fatigue crack detection

Masserey

Fromme

2017

Ultrasonics

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1The scattering of high frequency guided ultrasonic waves by a fatigue crack at the side of a 2 fastener hole has been studied. The guided wave pulse consists of the superposition of the two 3 fundamental Lamb modes A0 and S0 above the cut-off frequencies of the higher modes. The 4 scattered field was simulated using a three-dimensional finite difference algorithm with a 5 staggered, Cartesian grid for the limited area of interest around the hole and an analytical phase 6 angle correction for the additional, variable propagation distance. Experimentally, the modes 7were selectively excited using a standard ultrasonic wedge transducer and measured using a 8 laser interferometer, resulting in good spatial resolution. The scattered field was measured and 9 simulated for an undamaged hole, a small, part-thickness quarter-elliptical fatigue crack, and a 10 through-thickness fatigue crack. Good agreement was found and a significant influence of the 11 fatigue cracks on the scattered field was observed. The complex difference of the scattered 12 field due to additional scattered waves at the fatigue cracks of variable depth and length was 13 evaluated. This allows for the sensitivity prediction of high frequency guided waves for fatigue 14 crack detection at fastener holes, a significant maintenance problem for ageing aircraft. 15 16

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“…The problem of the fatigue failure initiating from a hole is well known and commonly observed in engineering structures. The analysis of the wave propagation near the holes is complicated because of the reflections from the boundaries [9,10]. However, there are methods for monitoring the state of the hole edge during the fatigue tests [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Fatigue Failure Monitoring in Composite Plate with a Circular Hole by Elastic Wave Propagation Method

Stawiarski¹,

Sanetra²,

Muc³

2017

dtetr

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Abstract. In this paper the elastic wave propagation method was used to observe the evolution of the failure form in composite multilayered plates with a circular hole. The measuring system based on two, surface-mounted piezoelectric (PZT) elements was applied. The sequential measurements of the elastic wave propagation during the fatigue test have been carried out. The Time of Flight (ToF) parameter defined as a time between guided wave excited by an actuator and the first wave captured by a sensor was introduced to observe the behavior of the defected structure. Monitoring of the (ToF) parameter during the fatigue test has been applied to estimate the state of the structure.

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Sensors for monitoring early stage fatigue cracking

Cited by 59 publications

References 10 publications

Practical Methods for Crack Length Measurement and Fatigue Crack Initiation Detection Using Ion-Sputtered Film and Crack Growth Characteristics in Glass and Ceramics

Practical Methods for Crack Length Measurement and Fatigue Crack Initiation Detection Using Ion-Sputtered Film and Crack Growth Characteristics in Glass and Ceramics

Analysis of high frequency guided wave scattering at a fastener hole with a view to fatigue crack detection

Fatigue Failure Monitoring in Composite Plate with a Circular Hole by Elastic Wave Propagation Method

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