Statistical pattern analysis of ultrasonic signals for fatigue damage detection in mechanical structures

Gupta, Savita; Singh, Dheeraj Sharan; Ray, Asok

doi:10.1016/j.ndteint.2008.06.001

Cited by 15 publications

(10 citation statements)

References 27 publications

(47 reference statements)

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“…The ultrasonic monitoring technique has been developed to detect the initiation and expansion of the fatigue crack in the fatigue testing [4][5][6][7][8][9][10]. In most of these monitoring techniques, data were recorded under pausing the fatigue tester [4,7,8,10,11], and these measurements can be called as stationary ultrasonic measurements.…”

Section: Introductionmentioning

confidence: 99%

“…In most of these monitoring techniques, data were recorded under pausing the fatigue tester [4,7,8,10,11], and these measurements can be called as stationary ultrasonic measurements. Authors [11] also carried out the stationary ultrasonic measurement of the bolted specimen during the fatigue testing with the surface acoustic wave (SAW), and they showed that the SAW scattered in the fretted region ahead of the bolt hole gradually increased with increasing number of fatigue cycles, and then steeply increased at a cycle when the fatigue crack might appear.…”

Section: Introductionmentioning

confidence: 99%

“…The ultrasonic data obtained in the previous studies with the stationary measurements were either at the maximum loads [5,10], the mean load [4,11], the minimum load [5] or the random loads [8] in the fatigue testing. In these studies, however, behaviors of the ultrasonic wave at any stress levels in a fatigue cycle were not examined precisely.…”

Section: Introductionmentioning

confidence: 99%

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Size Estimation of Fatigue Crack Appearing at Bolt Joints of Aluminum Alloy Plates by Synchronized SAW Measurement

Wagle

Katô

2010

Exp Mech

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The synchronized ultrasonic measurement with the surface acoustic wave (SAW) was carried out during the fatigue testing of bolted specimens of the aluminum alloy in synchronization with a fatigue cycle. The stationary SAW measurement was also carried out in the fatigue testing under pausing the fatigue tester at the mean load. In both measurements, the intensity of the scattered wave gradually increased with the number of fatigue cycles in the fretted region ahead of a bolt hole due to surface roughness, and the steep increment occurred following appearance and propagation of the fatigue crack. The steep increment was detected earlier in the synchronized measurement than that in the in-process measurement. In the synchronized SAW measurement, the intensity of the reflection from the fatigue crack increased with increasing stress level in the fatigue cycle. Then, the crack length was estimated with the intensity change of the reflection from the crack in the fatigue cycle following the Elber's model modified by Suresh on the crack opening and closure following the stress intensity factor. The method developed in the present work shows the potential of the synchronized surface acoustic wave measurement as a tool for the early detectability of the fatigue crack as well as for the evaluation of crack opening/closure behavior in the bolted joint.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Size Estimation of Fatigue Crack Appearing at Bolt Joints of Aluminum Alloy Plates by Synchronized SAW Measurement

Wagle

Katô

2010

Exp Mech

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“…Oruganti et al [10] applied non linear ultrasonic measurements for damage evaluation on the basis of Granato-Lucke theory that assumed the array of dislocations as elastic strings vibrating in accordance with fundamental frequency of the ultrasonic signal. Gupta et al [11] explained the effect of crack initiation and propagation on statistical pattern distribution of ultrasonic responses. Pecorari et al [12] correlated different geometries of cracks with scattered frequency components.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic quantification of high temperature cyclic damage in an advanced nickel based superalloy

Barat

Metya

Sathpathy

et al. 2015

Materials Science and Engineering: A

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“…The nondestructive methods such as ultrasonic detection techniques [1][2][3][4][5][6][7][8][9] have been developed for characterization and detection of the surface crack. The authors [10,11] carried out the surface acoustic wave (the SAW) measurement during the fatigue testing of the bolted joints to detect the initiation and propagation of the fatigue crack at the bolted region.…”

Section: Introductionmentioning

confidence: 99%

Real-time Measurement of Ultrasonic Waves at Bolted Joints under Fatigue Testing

Wagle

Katô

2011

Exp Mech

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The real-time measurement of the surface acoustic wave (SAW) was carried out during the fatigue testing of the bolted joints of aluminum alloy plates with a frequency of 0.001 Hz. SAW distributions in the bolted region were compared with those obtained by the synchronized measurement, in which the ultrasonic wave was generated in synchronization with a loading cycle in the fatigue testing with a frequency of 10 Hz. At different numbers of fatigue cycles, the intensity of the reflection from the fatigue crack obtained by the real-time measurement was in good agreement with that obtained by the synchronized measurement. In the real-time measurement, the reflection intensity and profile changed with the stress level in a loading cycle, which were in good agreement with those obtained by the synchronized SAW measurement. From these results, it was confirmed that the SAW distributions obtained by the synchronized measurement is coincident with ones obtained by the real-time measurement in one loading cycle, and is not influenced by the measurement conditions.

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Statistical pattern analysis of ultrasonic signals for fatigue damage detection in mechanical structures

Cited by 15 publications

References 27 publications

Size Estimation of Fatigue Crack Appearing at Bolt Joints of Aluminum Alloy Plates by Synchronized SAW Measurement

Size Estimation of Fatigue Crack Appearing at Bolt Joints of Aluminum Alloy Plates by Synchronized SAW Measurement

Ultrasonic quantification of high temperature cyclic damage in an advanced nickel based superalloy

Real-time Measurement of Ultrasonic Waves at Bolted Joints under Fatigue Testing

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