Characterization of spontaneous magnetic signals induced by cyclic tensile stress in crack propagation stage

Huang, Haihong; Jiang, Shilin; Wang, Yan; Zhang, Lei; Liu, Zhifeng

doi:10.1016/j.jmmm.2014.04.047

Cited by 25 publications

(6 citation statements)

References 25 publications

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“…The probability rule for random variables obeying a normal distribution is that the probability of acquiring a value near μ is relatively higher and a smaller value of σ means that the distribution is more concentrated around μ. Variance analysis requires that analysis indices obey or are close to obeying the normal distribution, which is the theoretical basis of many statistical methods. According to the test results, the analysis of variance can identify the relevant factor that affects experimental results [18] . In this case, each sample is independent and the only variable in the experiment is the tensile stress.…”

Section: Resultsmentioning

confidence: 99%

The effect of variable tensile stress on the MFL signal response of defective wire ropes

Gao¹,

Lian²,

Xu³

et al. 2016

Insight

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This paper considers the effect of tensile stress on the strength of the magnetic leakage field of a steel wire rope defect, which is easily neglected in the actual detection process. An inspection platform was built to load a variable force onto reproduced samples of typical defective wire ropes. Coil sensors were used to detect the radial component of the magnetic leakage field. In addition, the wavelet denoising method and wavelet singularity analysis were used to reduce the background noise and acquire the peak-to-peak values of low-frequency components of the magnetic flux leakage (MFL) signal, respectively. The validity of the extracted data and the effect of tensile stress on the strength of the magnetic leakage field were verified via the analysis of variance method. The experimental results reveal that the peak-to-peak values of the MFL signal from all the defective wire ropes increase with increasing tensile stress, in an approximately linear relationship. The tensile stress must remain consistent and stable during inspection to obtain better repeatability.Moreover, the detection accuracy can be improved by increasing the loading force within an appropriate range. The results of this study have significant implications for the enhancement of the reliability of wire rope defect detection.

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Section: Resultsmentioning

confidence: 99%

The effect of variable tensile stress on the MFL signal response of defective wire ropes

Gao¹,

Lian²,

Xu³

et al. 2016

Insight

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“…As a result, the leakage magnetic field appears in the stress and deformation concentration area. Moreover, the tangential component H(x) of the leakage magnetic field has a maximum value and the normal component H(y) changes the symbols and goes across zero line [20]. The amplitude of the tangential and normal magnetic field is in connection with the degree of frictional wear.…”

Section: Discussionmentioning

confidence: 98%

Research on tribo-magnetization phenomenon of ferromagnetic materials under dry reciprocating sliding

Zhao

Fan

Gao

et al. 2015

Tribology International

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“…The position of the sensor device is perpendicular to the surface of the specimen where the crack propagates on the surface of the specimen. In this position, the device can observe magnetic signal data at the point of stress convergence [ 30 ].…”

Section: Methodsmentioning

confidence: 99%

Evaluation of the Behaviour of Steel Bar in the Concrete under Cyclic Loading Using Magnetic Flux Leakage and Acoustic Emission Techniques

2023

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The behaviour of the steel bar in concrete under cyclic loading has been evaluated using magnetic flux leakage associated with acoustic emission monitoring technique. Visual observation was used to observe the deformation of the beam under cyclic loading. The sensors of metal magnetic memory were scanned in the middle of the beam at a distance of 320 mm at the bottom part. Twenty-two cyclic ranges were performed for cyclic loading of 100 or 200 cycles for each range, with a frequency of 1 Hz and a sinusoidal wave mode. The magnetic flux leakage signal, acoustic emission characteristics and crack width were measured and analysed to evaluate the behaviour of the steel bar in the concrete beam. The magnetic flux leakage signal and acoustic emission energy results were well matched with the occurrence of cracks at the centre of the beam. It was found that the relationship between the magnetic leakage flux signal and crack opening showed a strong correlation with R2 of 0.969. A high acoustic emission energy of 1300 nVs is observed at the centre of the beam. Based on the results, the behaviour of the steel in the concrete beam can be determined by the integrity assessment of a structure.

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Characterization of spontaneous magnetic signals induced by cyclic tensile stress in crack propagation stage

Cited by 25 publications

References 25 publications

The effect of variable tensile stress on the MFL signal response of defective wire ropes

The effect of variable tensile stress on the MFL signal response of defective wire ropes

Research on tribo-magnetization phenomenon of ferromagnetic materials under dry reciprocating sliding

Evaluation of the Behaviour of Steel Bar in the Concrete under Cyclic Loading Using Magnetic Flux Leakage and Acoustic Emission Techniques

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