Review of nonlinear ultrasonic guided wave nondestructive evaluation: theory, numerics, and experiments

Vamshi Krishna Chillara, Cliff J. Lissenden
2015 Optical Engineering: The Journal of SPIE  
Interest in using the higher harmonic generation of ultrasonic guided wave modes for nondestructive evaluation continues to grow tremendously as the understanding of nonlinear guided wave propagation has enabled further analysis. The combination of the attractive properties of guided waves with the attractive properties of higher harmonic generation provides a very unique potential for characterization of incipient damage, particularly in plate and shell structures. Guided waves can propagate
more » ... latively long distances, provide access to hidden structural components, have various displacement polarizations, and provide many opportunities for mode conversions due to their multimode character. Moreover, higher harmonic generation is sensitive to changing aspects of the microstructures such as to the dislocation density, precipitates, inclusions, and voids. We review the recent advances in the theory of nonlinear guided waves, as well as the numerical simulations and experiments that demonstrate their utility.
doi:10.1117/1.oe.55.1.011002 fatcat:yju7wuh6q5gmbawi2bcmczm3m4