文献类型：期刊文献

英文题名：Nonlinear ultrasonic Lamb wave phased array imaging based on hybrid array and time-reversal of harmonic

作者：Li, Xuan[1];Liu, Lishuai[1,2];Xu, Haiming[1];Xiang, Yanxun[1];Xuan, Fu-Zhen[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai Key Lab Intelligent Sensing & Detect, Room 206,Bldg 14, Shanghai, Peoples R China;[2]Shanghai Inst Aircraft Mech & Control, Shanghai, Peoples R China

年份：2025

卷号：24

期号：6

起止页码：3431

外文期刊名：STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL

收录：;EI(收录号：20243717021935);WOS:【SCI-EXPANDED(收录号:WOS:001309098700001)】；

基金：The author(s) disclosed receipt of the following financial sup-port for the research, authorship, and/or publication of thisarticle: This work was supported by the National Natural Science Foundation of China (Grant Nos. 12025403, 12374434, 12327807, and 12104155), the Basic Research Program of Shanghai Science and Technology Innovation Action Plan (No. 23JC1401600) and the Shanghai Gaofeng Project for University Academic Program Development.

语种：英文

外文关键词：Nonlinear Lamb wave; phased array; contact acoustic nonlinearity; time-reversal; fatigue crack imaging

摘要：Fatigue cracks, as one of the early performance deteriorations of plate-like structures, are critical to be detected in a timely manner to prevent further failures and disastrous accidents. But the intimate contact of crack interfaces is difficult to form a significant scattering field of traditional ultrasonic Lamb waves, resulting in the insensitivity of Lamb wave phased array-based imaging methods to crack imaging. To break through the detecting limitations of conventional Lamb wave phased array, the nonlinear Lamb wave-based phased array method is first proposed to realize fatigue crack imaging, which is achieved by a new form of phased array with hybrid elements, signal processing for harmonic enhancement and time-reversal based harmonic field focusing. The hybrid array is designed for efficient transmission and capture of fundamental wave and harmonics, and Pulse-inversion technology and continuous wavelet transform filter are used to extract and enhance second harmonic response, and the images are obtained by the time domain topological energy imaging algorithm. Finally, the imaging results of barely visible fatigue cracks and through-holes in metallic plate structures using linear and nonlinear Lamb wave-phased array are compared. The nonlinear ultrasonic Lamb wave-phased array demonstrates excellent capability of fatigue crack imaging.