Impact of Changing Temperature on Lamb Wave Propagation for Damage Detection

Abstract:

Lamb waves are the most widely used guided ultrasonic waves for structural damage detection. One of the major problems associate with Lamb wave propagation is the effect of temperature on wave propagation parameters. It is important that these parameters are more sensitive to damage than to varying temperature. The paper demonstrates how amplitude and arrival time of Lamb waves are affected by temperature. The analysis is performed for the experimental data gathered from Lamb wave propagation in a damaged aluminium plate. A simple clustering algorithm is used to distinguish between "undamaged" and "damaged" conditions in the presence of changing temperature.

• Periodical: Key Engineering Materials (Volume 588)
• Pages: 140-148
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.588.140
• Online since: October 2013
• Authors: Rafal Radecki, Wieslaw Jerzy Staszewski, Tadeusz Uhl
• Keywords: Data Clustering, Instantaneous Phase, Lamb Waves, Piezoceramic Transducer, Structural Damage Detection, Temperature Effects

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