Micro-crack detection of nonlinear Lamb wave propagation in three-dimensional plates with mixed-frequency excitationyg<xref rid="cpb_29_1_014302fn1" ref-type="fn">*</xref><fn id="cpb_29_1_014302fn1"><label>*</label><p>Project supported by the National Natural Science Foundation of China (Grant Nos. 61571222, 61602235, and 11474160) and the Six Talent Peaks Project of Jiangsu Province, China.</p></fn>

Micro-crack detection of nonlinear Lamb wave propagation in three-dimensional plates with mixed-frequency excitationyg**

Project supported by the National Natural Science Foundation of China (Grant Nos. 61571222, 61602235, and 11474160) and the Six Talent Peaks Project of Jiangsu Province, China.

Zhu Wei-Guang¹, Li Yi-Feng^{1, 2, †}, Guan Li-Qiang¹, Wan Xi-Li¹, Yu Hui-Yang¹, Liu Xiao-Zhou³

Excitation signals in aluminum plate, showing (a) time domain spectrum and (b) frequency domain spectrum.