Session: Structural Health Monitoring I & II, Material Characterization by Ultrasonic wave

Paper Number: 167764

167764 - Damage Localization in Plates Using Topological Acoustics Based Sensing Technique 

Abstract: 

Traditional structural damage localization methods often require multiple sensors to measure signals passing through various paths in the structure. After comparing the recorded signals in a defect-free reference state of the structure and a damaged structure, the information related to the existence of the damage and its location are obtained. The recently developed topological acoustic (TA) sensing technique can significantly improve this approach. TA captures the shift in the geometric phase of an acoustic field, enabling the detection of minor perturbations in the supporting medium. In this presentation, a diagnostic imaging method for damage detection in plate structures based on the TA sensing technique is discussed. The proposed method extracts the geometric phase shift index (GPS-I) from the Lamb wave response signals. This information is used not only to indicate the existence of a damage but also to identify its location. Using Abaqus/CAE, a finite element model of the plate is built to simulate the Lamb wave propagation through the plate. Recorded signals are then analyzed to validate the feasibility of the proposed TA based method. The results indicate that this technique enables rapid and precise damage localization in the plate structure. The proposed technique is reference-free and requires recording of the propagating waves only at a few points on the damaged plate.

Presenting Author: Tribikram Kundu University of Arizona

Presenting Author Biography: Dr. Tribikram Kundu is a professor of engineering at the University of Arizona. His major research area is structural health monitoring and nondestructive testing using ultrasonic and electromagnetic waves. He is Fellow of five professional societies - ASME, ASCE, SPIE, ASNT and ASA and distinguished fellow of IIAV. He is Founding Editor-in-Chief of the ASME Journal of Nondestructive Evaluation, Diagnostics and Prognostics of Engineering Systems (JNDE, 2017-2024). He has served as Associate Editor of a number of other journals like Ultrasonics, Journal of the Acoustical Society of America, ASME Journal of Pressure Vessels Technology and Structural Health Monitoring – An International Journal.

Authors:

Bo Hu University of Arizona
Tribikram Kundu University of Arizona
Pierre A. Deymier University of Arizona
Keith Runge University of Arizona