Monitoring progressive damage in polymer-based composite using nonlinear dynamics and acoustic emission.
J Acoust Soc Am
; 125(1): EL39-44, 2009 Jan.
Article
em En
| MEDLINE
| ID: mdl-19173381
ABSTRACT
In this work quantitative results of applying nonlinear acoustic dynamics to study progressive damage in a polymer-based composite SMC (sheet molding compound) are presented. Via carefully controlled resonant plate experiment, nonlinear slow dynamics (SNLD) response of SMC in terms of relaxation time and frequency shift has been shown to be very sensitive to gradual damage induced using three-point bending tests. Besides, acoustic emission monitoring is used to characterize damage through the elastic energy released by SMC at every damage step. Interesting logarithmlike changes of the SNLD parameters as a function of the acoustic emission cumulated energy are found.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Acoust Soc Am
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
França