Guided Wave Acoustic Emission from Fatigue Crack Growth in Aluminium Plate

Lee, C.K.; Scholey, Jonathan J.; Wilcox, Paul D.; Wisnom, M.R.; Friswell, M. I.; Drinkwater, B.W.

doi:10.4028/0-87849-420-0.23

Cited by 12 publications

(14 citation statements)

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“…Thus we may conclude that the AE signals travel as guided waves in the structure. This finding was well-supported by the other researchers [ 8 ]. Furthermore, we may construe that the experimentally measured AE signals were generated from the tip of the fatigue crack.…”

Section: Comparison Between the Multiphysics Simulation And Experisupporting

confidence: 91%

“…Monitoring of the acoustic emission (AE) from the progressive fatigue damage is categorized as the passive online monitoring [ 5 , 6 , 7 ]. The AE signals from the fatigue crack have always been an interest for the researchers [ 8 , 9 , 10 , 11 ]. Lee et al experimentally showed that the AE waves from fatigue crack growth propagate as guided waves [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

“…The AE signals from the fatigue crack have always been an interest for the researchers [ 8 , 9 , 10 , 11 ]. Lee et al experimentally showed that the AE waves from fatigue crack growth propagate as guided waves [ 8 ]. They used the commercially available resonant type (250 kHz) and wideband (100 kHz–600 kHz) AE sensors to capture the AE signals.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multiphysics Simulation of Low-Amplitude Acoustic Wave Detection by Piezoelectric Wafer Active Sensors Validated by In-Situ AE-Fatigue Experiment

Bhuiyan

Giurgiutiu

2017

Materials

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Piezoelectric wafer active sensors (PWAS) are commonly used for detecting Lamb waves for structural health monitoring application. However, in most applications of active sensing, the signals are of high-amplitude and easy to detect. In this article, we have shown a new avenue of using the PWAS transducer for detecting the low-amplitude fatigue-crack related acoustic emission (AE) signals. Multiphysics finite element (FE) simulations were performed with two PWAS transducers bonded to the structure. Various configurations of the sensors were studied by using the simulations. One PWAS was placed near to the fatigue-crack and the other one was placed at a certain distance from the crack. The simulated AE event was generated at the crack tip. The simulation results showed that both PWAS transducers were capable of sensing the AE signals. To validate the multiphysics simulation results, an in-situ AE-fatigue experiment was performed. Two PWAS transducers were bonded to the thin aerospace test coupon. The fatigue crack was generated in the test coupon which had produced low-amplitude acoustic waves. The low-amplitude fatigue-crack related AE signals were successfully captured by the PWAS transducers. The distance effect on the captured AE signals was also studied. It has been shown that some high-frequency contents of the AE signal have developed as they travel away from the crack.

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Section: Comparison Between the Multiphysics Simulation And Experisupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multiphysics Simulation of Low-Amplitude Acoustic Wave Detection by Piezoelectric Wafer Active Sensors Validated by In-Situ AE-Fatigue Experiment

Bhuiyan

Giurgiutiu

2017

Materials

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“…Both analytical and finite element method (FEM) simulation suggested that the formation of a crack in the aluminum alloys emits acoustic waves (Andreykiv et al, 2010; Guo et al, 1998; Prosser et al, 1999; Sause and Richler, 2015). Many researchers attempted to use the AE monitoring for thin structural components of aircraft (Chang et al, 2009; Ernst et al, 2016; Lee et al, 2006; Lucas, 2010). Three types of elastic waves were identified during a fatigue experiment on aluminum alloy specimen (Nam and Mal, 2001).…”

Section: Introductionmentioning

confidence: 99%

Acoustic emission sensor effect and waveform evolution during fatigue crack growth in thin metallic plate

Bhuiyan

Lin

Giurgiutiu

2017

Journal of Intelligent Material Systems and Structures

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In this article, the effect of the acoustic emission sensor on the acoustic emission waveforms from fatigue crack growth in a thin aerospace specimen is presented. In situ acoustic emission fatigue experiments were performed on the test coupons made of aircraft grade aluminum plate. Commercial Mistras S9225 acoustic emission sensor and piezoelectric wafer active sensor were used to capture the acoustic emission waveforms from the fatigue crack. It has been shown that the piezoelectric wafer active sensor transducer successfully captured the fatigue crack–related acoustic emission waveforms in the thin plate. The piezoelectric wafer active sensor transducer seems to capture more frequency information of the acoustic emission waveform than the conventional acoustic emission sensor in this particular application. We have also shown the evolution of the acoustic emission waveforms as the fatigue crack grows. The signatures of the fatigue crack growth were captured by the evolution of the acoustic emission waveforms. This waveform evolution is highly related to the physical boundary conditions of the cracks as well as the fatigue crack growth mechanism. The fatigue loading and acoustic emission measurement were synchronized using the same acoustic emission instrumentation. This synchronization provided the exact load level when the acoustic emission signals had occurred during the fatigue crack growth.

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“…Although composite materials have been employed over recent decades, aluminium alloys are still widely used and contribute to over 50% of the total weight of an aircraft [1]. It is known that aluminium alloys are susceptible to fatigue damage and there has been a significant amount of research towards the development of structural health monitoring methodologies to detect and monitor the onset of fatigue damage and the eventual fatigue crack growth [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Acoustic Emission of Metallic Specimen with Surface Defect During Fatigue Crack Growth

Rose

Davies

Vien

et al. 2021

Materials Research Proceedings

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Abstract. Acoustic emission is defined as the phenomena whereby transient elastic waves are generated by the rapid release of localized sources within a material. During fatigue crack growth, the formation of new crack surfaces is associated with a sudden release of energy, which constitutes acoustic sources for acoustic emission. This paper investigates the acoustic emission signature arising from fatigue test of a metallic specimen under tensile fatigue test. In this experimental study, dog-bone aluminium alloy specimen with a surface defect was fatigued to failure. It is found that the acoustic emission characteristics are different during the propagation of surface crack, because the source is changing. The results provide a useful guide in identifying source origin based on the characteristics of the acoustic emission waveform.

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Guided Wave Acoustic Emission from Fatigue Crack Growth in Aluminium Plate

Cited by 12 publications

References 0 publications

Multiphysics Simulation of Low-Amplitude Acoustic Wave Detection by Piezoelectric Wafer Active Sensors Validated by In-Situ AE-Fatigue Experiment

Multiphysics Simulation of Low-Amplitude Acoustic Wave Detection by Piezoelectric Wafer Active Sensors Validated by In-Situ AE-Fatigue Experiment

Acoustic emission sensor effect and waveform evolution during fatigue crack growth in thin metallic plate

Acoustic Emission of Metallic Specimen with Surface Defect During Fatigue Crack Growth

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