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- W2770640411 abstract "In this talk, we report results on the nonlinear interactions of ultrasonic coda waves, in reverberating or multiple scattering mesoscopic solid media. Using the method of coda wave interferometry (CWI), we analyze the effect of mixing a coda wave with an additional lower frequency pump wave. The extracted CWI parameters, known to be highly sensitive to small geometric or elastic modifications of the tested medium, are shown to be pump-amplitude dependent and to capture finely the results of the nonlinear interactions. Although nonlinear self-action effects with coda waves have been reported in unconsolidated granular media, they are difficult to implement in cracked solids or concrete. Instead, the reported nonlinear CWI class of methods (NCWI) shows robustness, a high sensitivity, and has been applied successfully to various complex media and structures. We show through several examples on « model » media (cracked glass plates) and on concrete structures, that NCWI can be useful for the nondestructive evaluation of complex solids that are strongly scattering at usual probing frequencies. Preliminary results and prospects in nonlinear elastic properties imaging and quantitative evaluation with NCWI are discussed." @default.
- W2770640411 created "2017-12-04" @default.
- W2770640411 creator A5024015608 @default.
- W2770640411 date "2017-10-01" @default.
- W2770640411 modified "2023-09-30" @default.
- W2770640411 title "Nonlinear coda wave interferometry: Characterizing damage in complex solids" @default.
- W2770640411 doi "https://doi.org/10.1121/1.5014267" @default.
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