TY - GEN
T1 - Nonlinear guided waves for continuous material microstructure state awareness
AU - Lissenden, Cliff J.
AU - Liu, Yang
AU - Chillara, Vamshi K.
AU - Choi, Gloria
AU - Yao, Xiaochu
N1 - Publisher Copyright:
Copyright © 2014 by ASME.
PY - 2014
Y1 - 2014
N2 - This paper summarizes the characteristics of nonlinear ultrasonic guided waves and demonstrates the use of the nondispersive fundamental shear horizontal wave mode to generate a third harmonic that is sensitive to plastic strain and fatigue. Experimental results for an aluminum alloy plate are presented within the context of the current understanding of nonlinear guided waves. Due to the sensitive nature of higher harmonic measurements, instrumentation nonlinearities are discussed. In two different sets of experiments, the third harmonic generation is shown to be dependent upon (i) the plastic strain and (ii) the number of fatigue cycles. Thus, higher harmonic generation can provide material state awareness throughout the service life, especially before a macroscale crack initiates.
AB - This paper summarizes the characteristics of nonlinear ultrasonic guided waves and demonstrates the use of the nondispersive fundamental shear horizontal wave mode to generate a third harmonic that is sensitive to plastic strain and fatigue. Experimental results for an aluminum alloy plate are presented within the context of the current understanding of nonlinear guided waves. Due to the sensitive nature of higher harmonic measurements, instrumentation nonlinearities are discussed. In two different sets of experiments, the third harmonic generation is shown to be dependent upon (i) the plastic strain and (ii) the number of fatigue cycles. Thus, higher harmonic generation can provide material state awareness throughout the service life, especially before a macroscale crack initiates.
UR - https://www.scopus.com/pages/publications/84926312342
UR - https://www.scopus.com/pages/publications/84926312342#tab=citedBy
U2 - 10.1115/IMECE2014-39699
DO - 10.1115/IMECE2014-39699
M3 - Conference contribution
AN - SCOPUS:84926312342
T3 - ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
BT - Vibration, Acoustics and Wave Propagation
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2014 International Mechanical Engineering Congress and Exposition, IMECE 2014
Y2 - 14 November 2014 through 20 November 2014
ER -