文献类型：期刊文献

英文题名：Experimental and numerical investigations of nonlinear interaction of counter-propagating Lamb waves

作者：Sun, Maoxun[1];Xiang, Yanxun[1];Deng, Mingxi[2];Tang, Bo[1];Zhu, Wujun[1];Xuan, Fu-Zhen[1]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, MOE Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Chongqing Univ, Coll Aerosp Engn, Chongqing 400044, Peoples R China

年份：2019

卷号：114

期号：1

外文期刊名：APPLIED PHYSICS LETTERS

收录：;EI(收录号：20190206358793);WOS:【SCI-EXPANDED(收录号:WOS:000455893000011)】；

基金：This research was funded by the National Key Research and Development Program of China (Grant No. 2018YFC0808800) and the National Natural Science Foundation of China (Grant Nos. 11622430, 11774090, 51835003, and 11834008).

语种：英文

外文关键词：Mixing - Ultrasonic waves - Damage detection

摘要：The nonlinear interaction of Lamb waves has attracted considerable attention because of its potential for localizing micro-damage in plate-like structures. Most recent studies have focused on the nonlinear mixing of Lamb waves propagating in the same direction, but this makes it difficult to determine the exact position of micro-damage because of the relatively large mixing zone. To overcome these shortcomings, we consider the nonlinear interaction of counter-propagating Lamb waves in this letter, An obvious resonance phenomenon is first observed in both experiments and simulations, which agrees well with our previous theoretical analysis [Li et al, J. Appl. Phys. 124, 044901 (2018)]. Also, analyzing the time-domain signal shows that the precision of damage localization is a function of the frequencies, the number of cycles, and the phase and group velocities of the primary waves. Published under license by AIP Publishing.