Electromagnetic Stimulation of the Ultrasonic Signal for Nondestructive Detection of Ferromagnetic Inclusions and Flaws

Finkel, Peter; Godinez, Valery

doi:10.1109/tmag.2004.829313

Cited by 22 publications

(13 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The left-hand side of equation 11 where p is the generalized momentum of the particle, and then equating equations (14) and (15) and canceling the like terms yield…”

Section: Numerical Calculationmentioning

confidence: 99%

“…With contactless local electromagnetic loading, the EMAE method is extremely useful in testing structures to record possible crack growth and failure process under harsh environment. 14,15 In the previous study, the EMAE method has been found to detect crack activity effectively. 16 In this study, the principles of EMAE were explored first.…”

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Study on the orientation detection of surface cracks by electromagnetic acoustic emission

Cai

2019

International Journal of Distributed Sensor Networks

View full text Add to dashboard Cite

Crack orientation plays a vital role in structural integrity analysis, which provides quantitative crack growth and structural failure information. Even though many structural health monitoring systems can detect crack location and length, only few methods are capable of detecting crack orientation. Recently, we have shown that an electromagnetically induced acoustic emission method can detect active defect with elastic waves. In this article, the ability of the electromagnetically induced acoustic emission method for finding the orientation of cracks is studied. Based on the freeelectron theory and electroplastic flow concept, the mechanism of electromagnetically induced acoustic emission effect will be explored at the microscopic level. By studying the energy exchange between the free electrons and the metallic dislocations, the total energy and the trajectory of drift electrons radiated during the electromagnetic loading can be evaluated theoretically. The Hilbert-Huang transform method is applied for extracting properties of the experimental electromagnetically induced acoustic emission signals. The results showed that the correlation coefficients between the original signals and the intrinsic mode function components, as well as the instantaneous frequency of the intrinsic mode function, depended on the crack orientations. Hence, experimental results and analysis confirm that the crack orientation can be monitored by the crack-induced intrinsic mode function extracted from the electromagnetically induced acoustic emission signals.

show abstract

“…The left-hand side of equation 11 where p is the generalized momentum of the particle, and then equating equations (14) and (15) and canceling the like terms yield…”

Section: Numerical Calculationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Study on the orientation detection of surface cracks by electromagnetic acoustic emission

Cai

2019

International Journal of Distributed Sensor Networks

View full text Add to dashboard Cite

show abstract

“…Finkel and Godinez demonstrated the ability and advantages of the EM-induced defect stimulation to identify small cracks and ferromagnetic inclusions in thin-walled aluminum structures [ 33 ]. A method based on electromagnetic modulation of the ultrasonic signal was also proposed in the paper.…”

Section: Multi-wave Phenomena and Imagingmentioning

confidence: 99%

Multi-Wave and Hybrid Imaging Techniques: A New Direction for Nondestructive Testing and Structural Health Monitoring

Cheng

Deng

Cao

et al. 2013

Sensors

View full text Add to dashboard Cite

In this article, the state-of-the-art multi-wave and hybrid imaging techniques in the field of nondestructive evaluation and structural health monitoring were comprehensively reviewed. A new direction for assessment and health monitoring of various structures by capitalizing the advantages of those imaging methods was discussed. Although sharing similar system configurations, the imaging physics and principles of multi-wave phenomena and hybrid imaging methods are inherently different. After a brief introduction of nondestructive evaluation (NDE), structure health monitoring (SHM) and their related challenges, several recent advances that have significantly extended imaging methods from laboratory development into practical applications were summarized, followed by conclusions and discussion on future directions.

show abstract

“…Therefore, the acoustic wave equation of the isotropic elastic medium is below [11]: (8) Where (8), is denotes electromagnetic force. The currents concentrate extremely at the tip of the crack.…”

Section: The Effect Of Local Electromagnetic Stimulation Of Ae Simentioning

confidence: 99%

“…Electromagnetic stimulation can be loaded according to the actual demands to the detection so that it can reduce the time required in traditional AE load (needs a long-term load time). This method has good future in detecting the type and the amount of defects in the aircraft, large complex castings and multi-bonding materials [8].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Stimulation of the Acoustic Emission for Fatigue Crack Detection of the Sheet Metal

Jin

Yang²,

Liu

et al. 2010

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

A new electromagnetically induced acoustic emission technique (EMAE) is presented in this paper. Due to the acoustic emission signal generated by the electromagnetically induced highdensity eddy current pulse, EMAE can locate small flaws or cracks in thin-walled structures nondestructively in order to inspect specific areas without loading the whole structure. The acoustic emission (AE) signal captured by conventional or fiber optic AE sensors is modulated at the defect due to the crack closure. The differences can be found by comparing modulated AE signals from the defects and ones from the intact region in the spectrum. In this paper, the finite element model of EMAE has been implemented based on the concrete experiment models. The sample's deformation has been analysed when the exciting coil locates at different position. The results of experiments indicate that electromagnetic transient modulation of the acoustic emission could be used to enhance detection of small cracks in thin-walled metallic structures.

show abstract

Electromagnetic Stimulation of the Ultrasonic Signal for Nondestructive Detection of Ferromagnetic Inclusions and Flaws

Cited by 22 publications

References 7 publications

Study on the orientation detection of surface cracks by electromagnetic acoustic emission

Study on the orientation detection of surface cracks by electromagnetic acoustic emission

Multi-Wave and Hybrid Imaging Techniques: A New Direction for Nondestructive Testing and Structural Health Monitoring

Electromagnetic Stimulation of the Acoustic Emission for Fatigue Crack Detection of the Sheet Metal

Contact Info

Product

Resources

About