Defect localization in plate structures using the geometric phase of Lamb waves.

Ultrasonics

New Frontiers of Sound Science and Technology Center, University of Arizona, Tucson, AZ 85721, USA; Department of Materials Science and Engineering, University of Arizona, Tucson, AZ 85721, USA.

Published: January 2025

Commonly used methods for defect localization in structures are based on velocity differences (VD) or amplitude ratio (AR) (or attenuation due to scattering) measured along different sensing paths between a reference system and a defective system. A high value on a sensing path indicates a higher probability of the presence of defect on that path. We introduce an alternative approach based on the newly developed topological acoustic (TA) sensing technique for localizing defects in plate structures using Lamb waves. TA sensing exploits changes in geometric phase of acoustic waves to detect perturbations in the supporting medium. This approach uses a geometric phase change - index (GPC-I), a measure of the geometry of the acoustic field averaged over a spectral domain, as detection metric in lieu of VD or AR. Calculations based on the finite element method (FEM) in Abaqus/CAE software verifies the effectiveness of the proposed GPC-I-based defect localization method. Randomly located defects on the surface of a plate are localized with higher sensitivity and accuracy, by the GPC-I method in comparison to VD or AR-based methods.

Download full-text PDF

Source
http://dx.doi.org/10.1016/j.ultras.2024.107492DOI Listing

Publication Analysis

Top Keywords

defect localization
12
geometric phase
12
plate structures
8
lamb waves
8
defect
4
localization plate
4
structures geometric
4
phase lamb
4
waves commonly
4
commonly methods
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!