Stress measurement using magnetic Barkhausen noise and metal magnetic memory testing

Wang, Ping; Zhu, Shougao; Tian, Gui Yun; Wang, Haitao; Wilson, John W.; Wang, Xin

doi:10.1088/0957-0233/21/5/055703

Cited by 31 publications

(17 citation statements)

References 16 publications

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“…The impedance of coil is dependent on factors such as the gap between the sensor coil and the test specimen h , the resistivity of the test specimen ρ , the magnetic permeability of the test specimen μ and the frequency of the excitation signal f [23][24][25][26].…”

Section: Lrc Modelmentioning

confidence: 99%

Investigation on Eddy Current Sensor in Tension Measurement at a Resonant Frequency

Xiu

Ren

2017

Applied Sciences

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For resolving deficiencies of conventional tension measurement methods, this paper proposes a novel eddy current sensor with a single-coil structure based on the inverse magnetostrictive effect. An inductor-resistor-capacitor (LRC) model of eddy current sensor, which considers more parameters than the traditional inductor-resistor (LR) model, was established. The eddy current sensor was operated by a swept frequency signal that ranged from 0.1 MHz to 1.6 MHz, encompassing the sensor resonant frequency. At the resonant frequency, the data of impedance magnitude and phase were extracted and linear relations between the impedance parameters and the external tension were ascertained. The experimental results show that the resonant frequency and impedance magnitude of eddy current sensor will decrease linearly with the increase of the external tension, which is consistent with the theoretical model. In addition, to improve sensor performance, the sleeve structure was designed to reduce the loss of magnetic field. Both finite element simulations and experimental results demonstrate that the sleeve structure provides a higher permeability path to the magnetic field lines than the non-sleeve structure and effectively improves sensor sensitivity and correlation coefficient.

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Section: Lrc Modelmentioning

confidence: 99%

Investigation on Eddy Current Sensor in Tension Measurement at a Resonant Frequency

Xiu

Ren

2017

Applied Sciences

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“…al. [18] is presented in Figure 1. The linear dependence in the elastic region is completely sufficient, because rail geometry deformation emerges earlier than plastic deformation in the axial direction of the rail [18].…”

Section: Metal Magnetic Memory Measurementmentioning

confidence: 99%

“…Method on internal rail stress measurement seem like a research that has not been done yet. As mentioned in Section 5, this method does not require external magnetization [18] and this is a great asset for possible further application. If the measurement of the gradient of magnetic flux in rail results in a similar dependence as shown in Figure 1, the potential of applicability of this method would be great [18].…”

Section: Further Research Orientationmentioning

confidence: 99%

Measurement Methods of Internal Stress in Continuous Welded Rail

Vnenk

Culek

2017

APP

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Abstract. This paper deals with the problem of internal rail stress estimation. It is based on a detailed research of contemporary situation in the field, presents basic outlines of the problem and sums up the major research areas and their possible applications in the current state of railway infrastructure management.The directions are divided into four categories in the paper: Displacement Methods, Rail Shifting Methods, Methods Based on Acoustoelastic Effect and Methods Based on Magnetoelastic Effect. Particular methods, both scientific and industrial, are presented in their section respectively.Every method that is presented within the scope of this paper is briefly described and its advantages and disadvantages are mentioned. In the end, potential of application of some of the presented methods in the practical use is discussed.

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“…Jiles, Atherton, and Sablik 6 have demonstrated that hysteresis behavior of polycrystalline materials can be derived using the model of magnetic moments interacting with the effective field. Hence, magnetization of a bulk magnetic body can be calculated from the following equation…”

Section: Magnetic-plastic Modelmentioning

confidence: 99%

“…The magnetic properties in this stage are affected by the following factors. [5][6][7][8][9] (1) The density of dislocation considerably increases with an increase of plastic deformation of materials. The contributions of the interaction between dislocation and domain magnetization play an important role in the changes of magnetic properties.…”

mentioning

confidence: 99%