Nonlinear ultrasonic fatigue crack detection using a single piezoelectric transducer

Yun-Kyu An; Dong Jun Lee

doi:10.1117/12.2218810

20 April 2016 Nonlinear ultrasonic fatigue crack detection using a single piezoelectric transducer

Yun-Kyu An, Dong Jun Lee

Proceedings Volume 9803, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2016; 98032L (2016) https://doi.org/10.1117/12.2218810
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2016, Las Vegas, Nevada, United States

Abstract

This paper proposes a new nonlinear ultrasonic technique for fatigue crack detection using a single piezoelectric transducer (PZT). The proposed technique identifies a fatigue crack using linear (α) and nonlinear (β) parameters obtained from only a single PZT mounted on a target structure. Based on the different physical characteristics of α and β, a fatigue crack-induced feature is able to be effectively isolated from the inherent nonlinearity of a target structure and data acquisition system. The proposed technique requires much simpler test setup and less processing costs than the existing nonlinear ultrasonic techniques, but fast and powerful. To validate the proposed technique, a real fatigue crack is created in an aluminum plate, and then false positive and negative tests are carried out under varying temperature conditions. The experimental results reveal that the fatigue crack is successfully detected, and no positive false alarm is indicated.

Conference Presentation

Citation Download Citation

Yun-Kyu An and Dong Jun Lee "Nonlinear ultrasonic fatigue crack detection using a single piezoelectric transducer", Proc. SPIE 9803, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2016, 98032L (20 April 2016); https://doi.org/10.1117/12.2218810

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