Nonlinear NDE using contact acoustic nonlinearity (CAN)

Author

Solodov, I.Yu.

Volume

2

fYear

1994

fDate

Oct. 31 1994-Nov. 3 1994

Firstpage

1279

Abstract

Acoustic nonlinear properties of a nonbonded solid-state contact compressed by a static load were studied experimentally. Main attention was paid to a “flapping” CAN mechanism attributed to the contact discontinuity caused by an acoustic wave. Sub- and super- harmonic generation and chaotic CAN behavior were registered in the experiment. CAN was shown to be responsible for an efficient nonlinear scattering of SAWs providing inverse spectral composition of a reflected wave. The feasibility of reflection-mode nonlinear NDE of small surface fractured defects was also demonstrated

Keywords

crack detection; mechanical contact; nonlinear acoustics; surface acoustic waves; ultrasonic materials testing; ultrasonic reflection; chaotic behavior; contact acoustic nonlinearity; contact discontinuity; flapping CAN mechanism; inverse spectral composition; nonbonded solid-state contact; nonlinear NDE; nonlinear SAW scattering; reflected wave; reflection-mode nonlinear NDE; small surface fractured defects; static load compression; subharmonic generation; superharmonic generation; Acoustic frequency conversion; Acoustic reflection; Acoustic testing; Crack detection; Nondestructive testing; Surface acoustic waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE

Conference_Location

Cannes, France

Print_ISBN

0-7803-2012-3

Type

conf

DOI

10.1109/ULTSYM.1994.401817

Filename

401817