What question did this study set out to answer?

To identify and validate phase-matched guided wave mixing interactions in plates that isolate subtle material damage from instrumentation-generated nonlinear distortions.

August 23, 2017Journal of Applied Physics

Second order harmonic guided wave mutual interactions in plate: Vector analysis, numerical simulation, and experimental results

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Authors

MHMostafa HasanianPennsylvania State University CLCliff J. LissendenPennsylvania State University

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Implication

Simulation and experimental study demonstrates harmonic wave mixing in plates, indicating a viable method to isolate material damage from instrument noise.

Key Points

To identify and validate phase-matched guided wave mixing interactions in plates that isolate subtle material damage from instrumentation-generated nonlinear distortions.
Derived phase-matching criteria using wave vector analysis to identify pairs of primary guided waves capable of generating sum and difference frequency harmonics.
Modeled counter-propagating collinear shear horizontal waves interacting to produce a symmetric Lamb wave at the sum frequency using finite element analysis.
Conducted laboratory plate experiments and applied a signal subtraction technique to isolate the generated Lamb wave and confirm material-induced nonlinearity.
Wave vector analysis systematically mapped valid primary wave mode combinations that generate phase-matched sum and difference secondary harmonics across arbitrary propagation directions.
Laboratory experiments confirmed that counter-propagating shear horizontal waves generate a measurable symmetric Lamb wave whose distinct wave polarity prevents contamination from instrumentation noise.

Cite This Study

Hasanian et al. (2017) studied this question.

synapsesocial.com/papers/69dd5b3b8557d5ab8f40d2d1 https://doi.org/10.1063/1.4993924

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Implication

Simulation and experimental study demonstrates harmonic wave mixing in plates, indicating a viable method to isolate material damage from instrument noise.

Second order harmonic guided wave mutual interactions in plate: Vector analysis, numerical simulation, and experimental results

Discussion

Member takes

Implication

Key Points

Cite This Study

Second order harmonic guided wave mutual interactions in plate: Vector analysis, numerical simulation, and experimental results

Discussion

Member takes

Implication

Key Points

Cite This Study

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