Enhanced nonlinear crack-wave interactions for structural damage detection based on Lamb waves

Kajetan Dziedziech; Lukasz Pieczonka; Piotr Kijanka; Wieslaw J. Staszewski

doi:10.1117/12.2084064

23 March 2015 Enhanced nonlinear crack-wave interactions for structural damage detection based on Lamb waves

Kajetan Dziedziech, Lukasz Pieczonka, Piotr Kijanka, Wieslaw J. Staszewski

Proceedings Volume 9438, Health Monitoring of Structural and Biological Systems 2015; 94380C (2015) https://doi.org/10.1117/12.2084064
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2015, San Diego, California, United States

Abstract

The paper presents a novel damage detection method that combines Lamb wave propagation with nonlinear acoustics. Low-frequency excitation is used to modulate Lamb waves in the presence of fatigue cracks. The work presented shows that the synchronization of the interrogating high-frequency Lamb wave with the low-frequency vibration is a key element of the proposed method. The main advantages of the proposed method are the lack of necessity for baseline measurements representing undamaged condition and lack of sensitivity to temperature variations. Numerical simulations and experimental measurements are performed to demonstrate the application of the proposed method to detect fatigue crack in aluminum beam.

Citation Download Citation

Kajetan Dziedziech, Lukasz Pieczonka, Piotr Kijanka, and Wieslaw J. Staszewski "Enhanced nonlinear crack-wave interactions for structural damage detection based on Lamb waves", Proc. SPIE 9438, Health Monitoring of Structural and Biological Systems 2015, 94380C (23 March 2015); https://doi.org/10.1117/12.2084064

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