Characterization of adhesively bonded laminates using non-linear acoustics

Author

Batra, N.K. ; Delsanto, P.P. ; Agostini, V. ; Scalerandi, M.

Author_Institution

Naval Res. Lab., Washington, DC, USA

Volume

1

fYear

2000

fDate

36800

Firstpage

767

Abstract

Several bonded specimens of glass-glass, composite-composite materials containing various debonds have been fabricated. To characterize these specimens for debonds detection and evaluation, a 5.0 MHz focussed ultrasonic transducer is used to aim an ultrasonic pulse of large amplitude to the bond line. The back-scattered signal is Fourier-analyzed to observe the generation of higher harmonics. The measured non-linearity parameters reveal the presence of classical and/or nonclassical effects, according to the slope of the odd harmonics vs. the amplitude of the driving signal. Mapping of these effects is used to characterize the quality of the interfacial bonding

Keywords

Fourier analysis; adhesion; harmonic generation; laminates; nonlinear acoustics; ultrasonic materials testing; 5.0 MHz; Fourier analysis; composite-composite material; debond detection; focused ultrasonic transducer; glass-glass material; harmonic generation; interfacial adhesive bonding; laminate; nonlinear acoustics; ultrasonic NDE; ultrasonic backscattering; Acoustic waves; Bonding; Hysteresis; Laminates; Nonlinear acoustics; Nonlinear equations; Nonlinear optics; Optical transmitters; Signal generators; Ultrasonic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2000 IEEE

Conference_Location

San Juan

ISSN

1051-0117

Print_ISBN

0-7803-6365-5

Type

conf

DOI

10.1109/ULTSYM.2000.922657

Filename

922657