文献类型：期刊文献

英文题名：Disbonds detection in variable-thickness bonded plates based on attenuation of zero group velocity Lamb modes

作者：Liu, Xiewen[1];Zhu, Wujun[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, Shanghai 200237, Peoples R China

年份：2026

卷号：384

外文期刊名：COMPOSITE STRUCTURES

收录：;EI(收录号：20260920186040);WOS:【SCI-EXPANDED(收录号:WOS:001706776300001)】；

基金：This research was funded by the National Natural Science Founda-tion of China (Grant Nos. 12327807 and 12004114) , and the Basic Research Program of Shanghai Science and Technology Innovation Ac-tion Plan (Grant No. 24TS1412200) .

语种：英文

外文关键词：Guided wave; Bonded plate; Zero group velocity; Wave attenuation; Disbonds

摘要：Disbonds frequently occur in adhesively bonded metallic plates, and their detection is essential to the quality and safety of such components. The high thickness sensitivity of the resonant frequency of Zero Group Velocity (ZGV) poses a big challenge to disbonds detection of variable-thickness bonded plates (VTBPs) and renders conventional frequency-based detection methods inapplicable. To address this issue, this paper proposes a method based on the attenuation of ZGV Lamb modes for disbonds detection of VTBPs. Through theoretical analysis via the semi-analytical finite element (SAFE) method, we systematically investigated the distinct effects of thickness variation and disbonds on the dispersion characteristics of two ZGV modes. In the experiments, with signal attenuation and the attenuation rate employed as damage indicators, two ZGV modes were used to detect disbonds in VTBPs. The disbonds were effectively evaluated by the two damage indicators in both parallel and perpendicular directions with respect to the thickness variation. The imaging results were consistent with the actual disbonded regions in VTBPs. This study contributes to advancing the understanding of ZGV mode behaviors in variable thickness structures and provides a reference for the application of ZGV Lamb modes in the quantitative evaluation of complex bonded structures.