A Pseudo-3D Model for Electromagnetic Acoustic Transducers (EMATs)
Abstract
:1. Introduction
2. Vertical Plane Modelling
2.1. EMAT-EM Model
2.1.1. Adapted Analytical Solutions to the Vector Potential for a Straight Wire
2.1.2. Comparison between the Adapted Solution and FEM
2.1.3. EMAT-Lorentz Force Calculation
2.2. EMAT-US Simulation
2.2.1. Elastodynamic Equations
2.2.2. Combination of EMAT-EM and EMAT-US Models
2.2.3. Wave Propagations
2.3. EMAT-Reception Simulation
2.4. Experimental Validations
3. Horizontal Surface Plane Modelling—Directivity Analysis of Rayleigh Waves
3.1. The Analytical Solution to the Displacement of Rayleigh Waves
3.2. Linking EMAT-EM and EMAT-US Models
3.3. Analysis of the Beam Directivity of Rayleigh Waves
3.4. Experimental Validations
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Description | Symbol | Value |
---|---|---|
Length of the aluminium plate | Y | 600 mm |
Width of the aluminium plate | X | 600 mm |
Field spatial step | ∆xf | 1 mm |
Length of the meander-line-coil | L | 50 mm |
Source spatial step for each wire | ∆xs | 0.2 mm |
Density of the aluminium plate | ρ | 2700 kg/m3 |
Frequency | f | 483 kHz |
Longitudinal waves’ velocity | Cl | 6.375 mm/ |
Shear waves’ velocity | Cs | 3.14 mm/ |
Rayleigh waves’ velocity | Cr | 2.93 mm/ |
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Yin, W.; Xie, Y.; Qu, Z.; Liu, Z. A Pseudo-3D Model for Electromagnetic Acoustic Transducers (EMATs). Appl. Sci. 2018, 8, 450. https://doi.org/10.3390/app8030450
Yin W, Xie Y, Qu Z, Liu Z. A Pseudo-3D Model for Electromagnetic Acoustic Transducers (EMATs). Applied Sciences. 2018; 8(3):450. https://doi.org/10.3390/app8030450
Chicago/Turabian StyleYin, Wuliang, Yuedong Xie, Zhigang Qu, and Zenghua Liu. 2018. "A Pseudo-3D Model for Electromagnetic Acoustic Transducers (EMATs)" Applied Sciences 8, no. 3: 450. https://doi.org/10.3390/app8030450