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Fracture processes imaging in concrete using nonlinear ultrasound

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Academic year: 2021

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Figure

Figure 2: Time reversal mirror principle. (a) Ten forward signals sent by the sources
Figure 3: Representative results for the extraction of nonlinear parameters. (a) α and (b) β are extracted 277
Figure  4:  Experimental  images  of  the  cracked  region.  (a)  Nonlinear

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