Damage Mechanisms Identification of Polymer Based Composite Materials: Time-Frequency Investigation of Acoustic Emission Data Based on Hilbert-Huang Transform.

by Seif Eddine Hamdi, Alain Le Duff, Guy Plantier, Anthony Sourice, Laurent Simon, Romain Feron
Abstract:
Presented in this paper, a time-frequency damage characterization procedure in Glass Fiber Reinforced Polymer (GFRP) composite materials based on the analysis of the acoustic emission (AE)signals by the Hilbert-Huang transform (HHT). It is to be noted that the study of damage by means of AE in polymer composites prompted the possibility of correlating a specific damage mechanism with its acoustic signature. Several studies highlighted the relevance of frequency spectral analysis in order to reconstruct the whole damage process. Thus, the assessment of the time-varying dominant frequencies present in a typical AE signal acquisition, can make easier the assessment of its structural damage potential. The main difficulty in defining a relationship between a specific damage mode and its acoustic signature is that the AE signals in GFRP materials are usually non- stationary and comprise overlapping transients. Signals of this kind require, first of all, a joint time-frequency analysis. In this context, the newly developed HHT is exclusively used in the present work for AE signals waveform analysis to describe the damage behavior as a first step for in situ detection of structural damages in polymer based composite materials.
Reference:
Seif Eddine Hamdi, Alain Le Duff, Guy Plantier, Anthony Sourice, Laurent Simon, Romain Feron, « Damage Mechanisms Identification of Polymer Based Composite Materials: Time-Frequency Investigation of Acoustic Emission Data Based on Hilbert-Huang Transform. », In Acoustics 2012, Nantes, France, 2012.
Bibtex Entry:
@INPROCEEDINGS{Acoustics2012Hamdi1,
  author = {Hamdi, Seif Eddine and Le Duff, Alain and Guy Plantier and Anthony
	Sourice and Laurent Simon and Romain Feron},
  title = {Damage Mechanisms Identification of Polymer Based Composite Materials:
	Time-Frequency Investigation of Acoustic Emission Data Based on Hilbert-Huang
	Transform.},
  booktitle = {Acoustics 2012},
  year = {2012},
  address = {Nantes, France},
  month = apr,
  abstract = {Presented in this paper, a time-frequency damage characterization
	procedure in Glass Fiber Reinforced Polymer (GFRP) composite materials
	based on the analysis of the acoustic emission (AE)signals by the
	Hilbert-Huang transform (HHT). It is to be noted that the study of
	damage by means of AE in polymer composites prompted the possibility
	of correlating a specific damage mechanism with its acoustic signature.
	Several studies highlighted the relevance of frequency spectral analysis
	in order to reconstruct the whole damage process. Thus, the assessment
	of the time-varying dominant frequencies present in a typical AE
	signal acquisition, can make easier the assessment of its structural
	damage potential. The main difficulty in defining a relationship
	between a specific damage mode and its acoustic signature is that
	the AE signals in GFRP materials are usually non- stationary and
	comprise overlapping transients. Signals of this kind require, first
	of all, a joint time-frequency analysis. In this context, the newly
	developed HHT is exclusively used in the present work for AE signals
	waveform analysis to describe the damage behavior as a first step
	for in situ detection of structural damages in polymer based composite
	materials.},
  owner = {gplantier},
  timestamp = {2012.11.11}
}