Ultrasonic Nonlinearity Experiment due to Plastic Deformation of Aluminum Plate Due to Bending Damage.

Figure 14 reveals that the nonlinearity exhibits an increasing trend up to 76 mm, followed by a subsequent decrease.

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This approach aimed to capture the exact position of the plastic deformation, which exhibited a decreasing trend in nonlinearity between the 70 mm and 80 mm sections in the previous experiments.

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