A Phased Array-based Method for Damage Detection and Localization in Thin Plates

Malinowski, Paweł; Wandowski, Tomasz; Trendafilova, Irina; Ostachowicz, Wiesław

doi:10.1177/1475921708090569

Cited by 66 publications

(44 citation statements)

References 11 publications

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“…The focused field directs more energy towards the chosen ROI and partially circumvents the scattering and attenuation of the ultrasonic field due to interactions with the aggregates and the cement mortar matrix. There have been attempts at focusing of Lamb waves in thin plates towards particular directions using beam forming techniques to magnify the scattered field from damaged regions [42,43]. Beam steering of ultrasound for concrete inspection using phased array technology has been reported in [44][45][46][47].…”

Section: Introductionmentioning

confidence: 99%

Defect detection around rebars in concrete using focused ultrasound and reverse time migration

Beniwal

Ganguli

2015

Ultrasonics

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Section: Introductionmentioning

confidence: 99%

Defect detection around rebars in concrete using focused ultrasound and reverse time migration

Beniwal

Ganguli

2015

Ultrasonics

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“…These signals carries the inner conditions from the specimen and can be used to reconstruct the inner situation of test material. Unfortunately, the analysis based on amplitude of signal reflected to receivers is always inconspicuous and unreachable owing to the lack of signal strength from single probe [1] . Therefore, the problem related to the insufficient signal strength from single transducer should be settled urgently.…”

Section: Introductionmentioning

confidence: 99%

In-plane shear piezoelectric wafer active sensor phased arrays for structural health monitoring

et al. 2016

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This paper proposes a new way for guided wave structural health monitoring using in-plane shear (d36 type) piezoelectric wafer active sensors phased arrays. Conventional piezoelectric wafer active sensors phased arrays based on inducing into specific Lamb wave modes (d31 type) has already widely used for health monitoring of the thin-wall structures. Rather than Lamb wave modes, the in-plane shear piezoelectric wafer active sensors phased arrays induces inplane shear horizontal (SH) guided waves. The SH guided waves are distinct with the Lamb waves with simple waveform and less additional converted wave modes and the zero symmetric mode (SH 0 ) is non-dispersive. In this paper, the advantage of the shear horizontal wave and the in-plane shear piezoelectric wafers capability to generate SH waves is first reviewed. Then finite element analysis of a 4-in-plane shear wafer active sensors phased array embedded on a rectangular aluminium plate is performed. In addition, numerical simulations with respect to creaks with different sizes as well as locations are implemented by the in-plane shear wafer active sensors phased array. For comparison purposes, the same numerical simulations using the conventional piezoelectric wafer active sensors phased arrays are also employed at the same time. Results indicate that the in-plane shear (d36 type) piezoelectric wafer active sensors phased arrays has the potential to identify damage location and assess damage severity in structural health monitoring.

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“…Several studies have used the Lamb waves‐based damage diagnosis for simple geometry components such as large plates so that they can detect notch cracks successfully . Furthermore, some other studies have utilized built‐in piezoelectric (PZT) transducers to monitor complex structural geometries, for example, lap joints .…”

Section: Introductionmentioning

confidence: 99%

A semi-baseline damage identification approach for complex structures using energy ratio correction technique

Alem

Abedian

2017

Struct Control Health Monit

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Summary Because damage identification results based on the Lamb waves propagation approach can be influenced by varying environmental and operational conditions, development of a robust monitoring system with no need of the prior measured data of the structure has gained much attention recently. The instantaneous baseline damage detection technique is one of the promising methods that overcome the mentioned obstacles. For this, the material properties, electromechanical characteristics, and the geometric features must be identical. Also, sensor distances in similar paths and the geometric dimensions of the transducers must be the same. So, implementing the instantaneous baseline damage identification in complex structures is rather complicated due to the inherent non‐homogeneities involved. To ease the complexity, this article proposes a semi‐instantaneous baseline damage identification approach by modifying an existing instantaneous baseline method. This is used to detect and characterize fatigue cracks that initiate around the rivet holes of lap joint structures. In this method, an active sensing network is mounted on the lap joint, and a robust and effective feature called energy ratio change is extracted from the collected time‐domain signals using the wavelet transform. The introduced “identicality coefficient” for all the sensing paths in pristine condition of the structure is obtained and used to remove any inequalities that may occur to the signals of each path. The obtained results show that the proposed method can detect fatigue cracks around the lap joint rivet holes and estimate the crack size. An experiment as well as numerical simulations is performed to verify the method.

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A Phased Array-based Method for Damage Detection and Localization in Thin Plates

Cited by 66 publications

References 11 publications

Defect detection around rebars in concrete using focused ultrasound and reverse time migration

Defect detection around rebars in concrete using focused ultrasound and reverse time migration

In-plane shear piezoelectric wafer active sensor phased arrays for structural health monitoring

A semi-baseline damage identification approach for complex structures using energy ratio correction technique

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