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Published in:
2013 | OriginalPaper | Chapter
Mechanical Behaviour and Damage Evaluation by Acoustic Emission of Sandwich Structure
Authors : Imen Ben Ammar, Chafik Karra, Abderrahim El Mahi, Rachid El Guerjouma, Mohamed Haddar
Published in: Design and Modeling of Mechanical Systems
Publisher: Springer Berlin Heidelberg
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The aim of the present study is to investigate the mechanical behaviour of sandwich structure under static 4-bending loading. Two type of sandwich structures constituting with the [0/90
2
/0]
s
cross-ply laminates as skins and with PVC closed-cell as foams which are differing in their densities: 60 and 100 kg m
− 3
, were considered. The effects of the foam densities on the mechanical behaviour of composites under loading were studied. This work is also interested in identifying and characterizing the local damage in the composites with the use of acoustic emission method (AE). The damage investigation in those materials is reached by the analysis of acoustic emission signals collected from static 4-point bending tests. A cluster analysis of AE data is achieved and the resulting clusters are correlated to the damage mechanism of specimens under loading tests.