Time reversal technique for health monitoring of metallic structure using Lamb waves

Gangadharan, R.; Murthy, C. Siva Ram; Gopalakrishnan, S.; Bhat, M.R.

doi:10.1016/j.ultras.2009.05.002

Cited by 106 publications

(54 citation statements)

References 16 publications

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“…The TR simulation restores the shape of every generated flexural wave at its individual origin. The advantage of using broadband pulses in TR processes has also been reported by Gangadharan [9]. Resolving scatterers that are located close to each other is therefore facilitated.…”

Section: Crack Characterizationmentioning

confidence: 68%

“…The use of dispersion as an indicator for the distance a wave has traveled has already been reported by Wilcox et al [8], however not in combination with a time reversal (TR) process. The use of a broadband signal in combination with a TR experiment on plates was reported by Gangadharan [9]. It was reported, that, while the method cannot be used as a baseline free technique, an increase in signal to noise ratio and an improvement in spatial resolution was observed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Quantitative guided wave testing by applying the time reversal principle on dispersive waves in beams

Ernst

Dual

2015

Wave Motion

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Section: Crack Characterizationmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Quantitative guided wave testing by applying the time reversal principle on dispersive waves in beams

Ernst

Dual

2015

Wave Motion

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“…Rizzo and di Scalea utilized Discrete Wavelet Transform (DWT) to extract wavelet domain features for enhanced defect characterization in multiwire strand structures [10]. Gangadharan et al presented a time reversal technique using GWs to detect damage in an aluminum plate, and good results were achieved [11]. The wavelet analysis is widely used [12][13][14][15][16][17] in domains; many 2 Shock and Vibration successful applications of wavelet transform (WT) for GW signals have been done.…”

Section: Introductionmentioning

confidence: 99%

A Signal Decomposition Method for Ultrasonic Guided Wave Generated from Debonding Combining Smoothed Pseudo Wigner-Ville Distribution and Vold–Kalman Filter Order Tracking

Chen

2017

Shock and Vibration

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Carbon fibre composites have a promising application future of the vehicle, due to its excellent physical properties. Debonding is a major defect of the material. Analyses of wave packets are critical for identification of the defect on ultrasonic nondestructive evaluation and testing. In order to isolate different components of ultrasonic guided waves (GWs), a signal decomposition algorithm combining Smoothed Pseudo Wigner-Ville distribution and Vold-Kalman filter order tracking is presented. In the algorithm, the time-frequency distribution of GW is first obtained by using Smoothed Pseudo Wigner-Ville distribution. The frequencies of different modes are computed based on summation of the time-frequency coefficients in the frequency direction. On the basis of these frequencies, isolation of different modes is done by Vold-Kalman filter order tracking. The results of the simulation signal and the experimental signal reveal that the presented algorithm succeeds in decomposing the multicomponent signal into monocomponents. Even though components overlap in corresponding Fourier spectrum, they can be isolated by using the presented algorithm. So the frequency resolution of the presented method is promising. Based on this, we can do research about defect identification, calculation of the defect size, and locating the position of the defect.

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“…Kim et al [16] evaluated technical issues related to TR, and found that the bonding quality of surface mounted PZT elements affected the results; thus special care should be taken to control the quality of the bonding. Gangadharan et al [17] investigated the use of TR in metallic structures, and experimentally tested both the fundamental symmetric (S 0 ) and anti-symmetric (A 0 ) modes using narrowband and broadband excitation. This paper investigates the characteristics of guided waves for damage inspection in tapered sandwich structures with a high-density foam core (Dyvinicell HP100).…”

Section: Introductionmentioning

confidence: 99%

Propagation behaviour of guided waves in tapered sandwich structures and debonding identification using time reversal

Mustapha

2015

Wave Motion

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Time reversal technique for health monitoring of metallic structure using Lamb waves

Cited by 106 publications

References 16 publications

Quantitative guided wave testing by applying the time reversal principle on dispersive waves in beams

Quantitative guided wave testing by applying the time reversal principle on dispersive waves in beams

A Signal Decomposition Method for Ultrasonic Guided Wave Generated from Debonding Combining Smoothed Pseudo Wigner-Ville Distribution and Vold–Kalman Filter Order Tracking

Propagation behaviour of guided waves in tapered sandwich structures and debonding identification using time reversal

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