New nonlinear ultrasonic method for material characterization: Codirectional shear horizontal guided wave mixing in plate
A nonlinear ultrasonic method is proposed based on a group of newly discovered wave
triplets where two primary codirectional shear-horizontal SH0 waves mix in a weakly
nonlinear plate and generate a cumulative S0 Lamb wave at the sum frequency. Theoretical
analyses show that any combination of two primary SH0 waves whose frequencies sum to
the frequency at which the SH0 mode intersects the S0 Lamb wave mode results in an
internally resonant secondary S0 Lamb wave. Moreover, the relationship between the …
triplets where two primary codirectional shear-horizontal SH0 waves mix in a weakly
nonlinear plate and generate a cumulative S0 Lamb wave at the sum frequency. Theoretical
analyses show that any combination of two primary SH0 waves whose frequencies sum to
the frequency at which the SH0 mode intersects the S0 Lamb wave mode results in an
internally resonant secondary S0 Lamb wave. Moreover, the relationship between the …
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