Structural health monitoring of anisotropic plates using ultrasonic guided wave STMR array patches

Vishnuvardhan, J.; Muralidharan, Ajith; Krishnamurthy, C. V.; Balasubramaniam, Krishnan

doi:10.1016/j.ndteint.2008.09.012

Cited by 45 publications

(26 citation statements)

References 14 publications

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“…The main challenge to the inspection of composites is the presence of multiple layers and anisotropic nature. Ultrasonic guided waves have been proven an attractive tool in inspection of large structures [2][3][4][5]. PZT and Fiber Bragg Gratings based sensors have been embedded often to monitor the crack growth during the curing process [6].…”

Section: Introductionmentioning

confidence: 99%

Guided waves for online monitoring of composites

Shah¹,

Rajagopal²,

Balasubramaniam³

2017

AIP Conference Proceedings

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Section: Introductionmentioning

confidence: 99%

Guided waves for online monitoring of composites

Shah¹,

Rajagopal²,

Balasubramaniam³

2017

AIP Conference Proceedings

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“…Almeida et al propose a new type of eddy current probe with enhanced lift-off immunity and improved sensitivity and estimates a new NDT system [16]. Vishnuvardhan et al conduct structure health monitoring of anisotropic plates with single-transmitter multiple-receiver (STMR) eddy current sensor array [17]. Goldfine et al use permanently mounted meandering winding magnetometer (MWM) sensor arrays (MWM-arrays) with model-based multivariate inversion methods to detect crack initiation and monitor crack growth, which have been used in fatigue test of coupons and component as well as fullscale fatigue test [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Monitoring fatigue cracks of a metal structure using an eddy current sensor

Jiao

et al. 2016

J Wireless Com Network

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The present paper investigates monitoring of fatigue cracks of a metal structure using an eddy current micro sensor. Fatigue cracks tend to occur at bolt-jointed structures on an aircraft. In order to detect the damage quantitatively, a kind of change-prone micro eddy current sensor is designed and fabricated with flexible printed circuit board (FPCB) technology. A forward semi-analytical model is built by extracting a material's conductivity as the damage feature parameter, and characteristics analysis is conducted based on the model. The research focuses on setting up and utilizing the eddy current fields to analyze interaction of adjoining coils when the damage occurs, and investigating optimization on the working parameters of the sensor. In the experimental section, several common connection structures are applied to explore the sensor's monitoring ability both in air and in a corrosive environment. The result shows that the optimal working frequency is about 1 MHz. The eddy current micro sensor is capable of monitoring the crack growth with an accuracy of 1 mm, the average error being 4.6 % compared to fracture analysis. The sensor keeps high resolution of damage in aqueous corrosion. Due to the fretting fatigue, wear appears on the polyimide foil, leading to the decreases of the monitoring signal.

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“…1 and Refs. [3,4]). Although magnetostrictive material also has some drawbacks, such as the impedance problem in high-frequency applications, this material exhibits the distinct merit of noncontact energy transduction; thus, this material is competitive with piezoelectric material.…”

Section: Introductionmentioning

confidence: 99%