Affiliation:
1. Institute of Sensor and Actuator Technology, Coburg University of Applied Sciences and Arts, Am Hofbräuhaus 1b, 96450 Coburg, Germany
Abstract
Guided acoustic waves (GAW) have proven to be a useful tool for structural health monitoring (SHM). However, the dispersive nature of commonly used Lamb waves compromises the spatial resolution making it difficult to detect small or weakly reflective defects. Here we demonstrate an approach that can compensate for the dispersive effects, allowing advanced algorithms to be used with significantly higher signal-to-noise ratio and spatial resolution. In this paper, the sign coherence factor (SCF) extension of the total focusing method (TFM) algorithm is used. The effectiveness is examined by numerical simulation and experimentally demonstrated by detecting weakly reflective layers with a highly dispersive A0 mode on an aluminum plate, which are not detectable without compensating for the dispersion effects.
Funder
Federal Ministry for Economic Affairs and Climate Action based on a resolution of the German Bundestag
Subject
Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry
Reference48 articles.
1. Giurgiutiu, V. (2014). Structural Health Monitoring with Piezoelectric Wafer Active Sensors, AP Academic Press/Elsevier. [2nd ed.].
2. Pohl, M. (2022, January 19–23). A lamb wave-based icing sensor for aircraft ice detection. Proceedings of the International Workshop on Atmospheric Icing of Structures, Montreal QC, Canada.
3. Su, Z., and Ye, L. (2009). Identification of Damage Using LAMB Waves: From Fundamentals to Applications, Springer. Lecture notes in applied and computational mechanics.
4. Lamb waves-based technologies for structural health monitoring of composite structures for aircraft applications;Philibert;Eur. J. Mater.,2022
5. Post-processing of the full matrix of ultrasonic transmit–receive array data for non-destructive evaluation;Holmes;NDT E Int.,2005
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