Ultrasonic Nonlinearity Parameter Analysis Technique for Remaining Life Prediction

Report No. ARL-TN-0636
Authors: Raymond E Brennan
Date/Pages: September 2014; 14 pages
Abstract: A technique for using conventional pulse-echo configuration ultrasonic scanning to generate full wave time and frequency domain data has been developed. This method has demonstrated that fast Fourier transform frequency and amplitude data can be collected over the full area of a component. In comparison with similar techniques that have been developed, this method allows for ultrasonic nonlinearity parameter determination over the entire part from a single full wave scan. By collecting the data in this manner, future applications can be developed for generating second harmonic wave, nonlinearity parameter, and fatigue life image maps to aid in the prediction of remaining useful life in structural parts.
Distribution: Approved for public release
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Last Update / Reviewed: September 1, 2014