Nonlinear Electromagnetic Acoustic Testing Method for Tensile Damage Evaluation

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/js/volume-2018/1745257/figures/1745257.fig.0012a.svgz" name="1745257.fig.0012a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Before wavelet packet denoising</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/js/volume-2018/1745257/figures/1745257.fig.0012b.svgz" name="1745257.fig.0012b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>After wavelet packet denoising</td></tr></table>

<div>Frequency spectrum characteristic in nonlinear EMAT experiment.</div>

Journal of Sensors

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Figure 12

Figure 12: Nonlinear Electromagnetic Acoustic Testing Method for Tensile Damage Evaluation 