• Aucun résultat trouvé

New approach for the damage mechanismsidentification in the glass-epoxy composites

N/A
N/A
Protected

Academic year: 2021

Partager "New approach for the damage mechanismsidentification in the glass-epoxy composites"

Copied!
1
0
0

Texte intégral

(1)

Acoustics 2012 Nantes Conference 2012

New approach for the damage mechanisms identification in the glass-epoxy composites

A.Satour, S.Montrésor, M.Bentaharb, F.Boubeniderc and R. Elguerjouma

Abstract : The aim of this work is to introduce a new approach for clustering acoustic emission data occuring during the fracture process of glass fibre reinforced polymer (GFRP) plates. In particular, we have developed signal processing techniques based on continues wavelet transform (CWT) in order to isolate acoustic signature corresponding to each damage mechanism (fibre breakage, matrix cracking, etc.). Entropy criterion was used to provide selection of most significant wavelet coefficients of AE signals.

Models are established in the form of dictionaries, whose elements are the waveforms collected during specific experiments in which the created damage mechanisms are well known. Dictionaries should be used to classify acoustic emission signals recorded when polymer composites are under load.

Keywords : acoustic emission, wavelet transforme, damage mechanisms

Centre de Recherche en Technologies Industrielles - CRTI - www.crti.dz

Powered by TCPDF (www.tcpdf.org)

Références

Documents relatifs

Abstract : The aim of this work is to introduce a new approach for clustering acoustic emission data occurring during the fracture process of glass fibre reinforced polymer

In the other hand our purpose is to demonstrate the potentiality of acoustic emission in understanding the damage mechanisms that occurs during a tensile test of polymer fibre

These tests aim at confirming: – the ability to specify various relational properties over a large class of functions; – the capacity to prove and use such properties using

To do this, it investigates the cathartic aspects in confessional writings namely in De Profundis by Oscar Wilde (1905) and A Sister’s Confession by Guy de Maupassant

patented [22] an s 0 lamb wave writing tablet together with a solution to solve the problem of phase inversion at the leading edge of the s 0 lamb mode when an emitting stylus

( ةيعضولا لاثم 0 حب اوحـضو نييرـئازجلا نيدـهاجملا تلاوـطب نـع صخـش كرـبخأ :) نـم مهتاـي يسنرفلا للاتحلاا تاوق نيبو مهنيب ترج ةكرعم للاخ - ( زواـجتي لا

Cette communication, en partant de la description des dynamiques multiples et complexes d’un espace de l’entre-deux (la communauté de communes du pays de Lunel),

(1) Quantification of simulation errors w ith respect to time resolution: To quantify the errors in the prediction of the annual daylight availability w hich one incurs by