Finite Element Method Applied in Electromagnetic NDTE: A Review

Augustyniak, Marek; Usarek, Zbigniew

doi:10.1007/s10921-016-0356-6

Cited by 36 publications

(14 citation statements)

References 113 publications

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“…the effective inductance of the coils when NW is present), which includes not only the nominal inductance of the coils, but as well the combined influence of the rail and metal parts of the device itself. Here L NW was deduced from the resonance pulsation of the circuit, by a simple transformation of the formula (12):…”

Section: Field-circuit Coupling Function For a Parallel Resonant Circuitmentioning

confidence: 99%

“…It is worth emphasising again, that the idea of incorporating electromagnetic FEA into the process of developing NDT devices (including EC-based ones) and gaining deeper insight into the underlying phenomena if not new. A recent review of the field has been proposed in [12]. Many of the available works include detailed investigation of nonlinearities associated with ECs [13,14], as well as improved FE formulations [13,15], subtle micro-magnetomechanics [14] or consideration of technological process like press hardening or hot stamping of examined object [16].…”

Section: Introductionmentioning

confidence: 99%

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Towards an Universal Method for Predicting Eddy-Current Sensor Characteristics in the Railway Industry

Augustyniak

Borzyszkowski²,

Buława³

2019

J Nondestruct Eval

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Eddy current (EC) sensors placed in the vicinity of a rail track and sensitive to passing train components are safety-critical components commonly used in the railway sector. From the engineering point of view they form a system with numerous variables including their geometry, the lift-off, magnetic properties of the applied materials, the operating frequency and electrical characteristics of the built-in circuits. Although some simple configurations of the EC devices have been studied experimentally, numerically and analytically, there have so far been no universal algorithm allowing for predicting, understanding and optimizing output signals for arbitrarily device/track/wheel characteristics. A significant step towards such an universal algorithm is presented in this work, combining a linear 3D finite element modelling and a set of analytical formulas derived directly from the constants of the resonance circuit. Functions correlating the magnetic induction space/time characteristics with the circuit outputs are proposed and validated against experiment in three stages: (a) by determination of the signal from a flat thin FeSi plate (i.e. in fully controlled laboratory conditions), (b) by laboratory measurements of a highly degraded rail with uncertain material properties, (c) by tests of a commercial EC wheel detector, with reference to averaged service data. The proposed methodology can be extended to any NDT field where EC devices are applied.

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Section: Field-circuit Coupling Function For a Parallel Resonant Circuitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Towards an Universal Method for Predicting Eddy-Current Sensor Characteristics in the Railway Industry

Augustyniak

Borzyszkowski²,

Buława³

2019

J Nondestruct Eval

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“…There are some remarkable tools in implementation of advance function such as a robust solution or hysteresis loop of a moving conductor induction. The functionality of different tools however evolves rapidly and tend to converge [90].…”

Section: Fem Background In Mflmentioning

confidence: 99%

Theory and development of magnetic flux leakage sensor for flaws detection: A review

Sharif¹,

Ramli²,

Mohamed³

et al. 2019

IJAAS

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<p>This paper presents a review of state-of-art in the Magnetic Flux Leakage (MFL) sensor technology, which plays an important role in Nondestructive Testing (NDT) to detect crack and corrosion in ferromagnetic material. The demand of more reliable MFL tools and signal acquisition increase as it has a direct impact on structure integrity and can lead to be major catastrophic upon questionable signal analysis. This is because the size, cost, efficiency, and reliability of the extensive MFL system for NDT applications primarily depend on signal acquisition as a qualitative measure in producing a trustworthy analysis. Therefore, the selection of appropriate tools and methodology plays a major role in determining the comprehensive performance of the system. This paper also reviews an Artificial Neural Network (ANN) and Finite Element Method (FEM) in developing an optimum permeability standard on the test piece. </p>

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“…Ultrasonic wave detection, as one of the NDT technologies, is rapid, can be used for long-distance detection and has good environmental * adaptability, and is currently widely used in industry. It is a method used to determine whether a specimen has defects by using the propagation characteristics of the ultrasonic wave, namely, reflection, transmission, and refraction [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Oblique Point-Focusing Shear-Horizontal Guided-Wave Electromagnetic Acoustic Transducer With Variable PPM Spacing

Sun

Wang

Huang

et al. 2020

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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We realized a phase-coherent oblique pointfocusing shear-horizontal (SH) guided-wave electromagnetic acoustic transducer (EMAT) composed of variable-spacing periodic permanent magnets (PPMs) and racetrack coils. For traditional focusing transducers, the necessary focal position adjustment in defect detection requires a redesign of the coil structure. More conveniently, this new transducer structure arrangement can achieve wave focusing and focal position change by rationally adjusting the layout of the periodic permanent magnet without changing the coil structure. Simulation results show that this newly designed transducer has good focusing performance: it can successfully focus the signal to a preset point, and the signal amplitude is nearly double that of the nonfocusing side. In addition, the focusing performance optimization of the transducer has been studied. The experimental results agree well with the actual location and size of a defect, which verifies the effectiveness of the newly designed focusing transducer in defect detection. Index Terms-Electromagnetic acoustic transducer (EMAT), oblique point-focusing shear-horizontal (SH) guided wave, , variable periodic permanent magnet (PPM) spacing.

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Finite Element Method Applied in Electromagnetic NDTE: A Review

Cited by 36 publications

References 113 publications

Towards an Universal Method for Predicting Eddy-Current Sensor Characteristics in the Railway Industry

Towards an Universal Method for Predicting Eddy-Current Sensor Characteristics in the Railway Industry

Theory and development of magnetic flux leakage sensor for flaws detection: A review

Oblique Point-Focusing Shear-Horizontal Guided-Wave Electromagnetic Acoustic Transducer With Variable PPM Spacing

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