Measuring acoustic nonlinearity parameter using collinear wave mixing

This study introduces a new acoustic nonlinearity parameter βT. It is shown that βT is associated with the interaction between a longitudinal wave and a shear wave in isotropic elastic solids with quadratic nonlinearity. Experimental measurements are conducted to demonstrate that the collinear wave...

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Veröffentlicht in:Journal of applied physics 2012-07, Vol.112 (2)
Hauptverfasser: Liu, Minghe, Tang, Guangxin, Jacobs, Laurence J., Qu, Jianmin
Format: Artikel
Sprache:eng
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Zusammenfassung:This study introduces a new acoustic nonlinearity parameter βT. It is shown that βT is associated with the interaction between a longitudinal wave and a shear wave in isotropic elastic solids with quadratic nonlinearity. Experimental measurements are conducted to demonstrate that the collinear wave mixing technique is capable of measuring βT nondestructively. Further, it is shown that βT is well-correlated with the plastic deformation in Al-6061 alloys. These results indicate that collinear wave mixing is a promising method for nondestructive assessment of plastic deformation, and possibly, fatigue damage in metallic materials.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4739746