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Delamination analysis of composite sandwich plate of cork agglomerate/glass fiber-polyester : an experimental investigation / Hocine Djemai in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 31, N° 4 (08/2021)
[article]
Titre : Delamination analysis of composite sandwich plate of cork agglomerate/glass fiber-polyester : an experimental investigation Type de document : texte imprimé Auteurs : Hocine Djemai, Auteur ; Adnane Labed, Auteur ; Mabrouk Hecini, Auteur ; Tarek Djoudi, Auteur Année de publication : 2021 Article en page(s) : p. 193-197 Note générale : Bibliogr. Langues : Français (fre) Catégories : Analyse de dommages (matériaux)
Composites -- Délaminage
Composites à fibres de verre
Construction sandwich
Liège
Panneaux de fibres
PolyestersIndex. décimale : 668.4 Plastiques, vinyles Résumé : This paper presents an experimental investigation of damage in sandwich structures. These sandwich panels are result of the combination of glass-polyester as skins and cork agglomerate as core. For this purpose, delamination test (mode I) is carried on double cantilever beams (DCB) in sandwich beams. The initiation crack is characterized by toughness obtained from the determination of energy release rate (GIC) by modified beam theory method. The skins of these sandwiches are considered as orthotropic materials while the core as isotropic transverse material. The results show that, the energy release rate at the initiation of the crack of (DCB) specimens remains almost constant despite the variation of the initial crack, a good adhesion (skins - core) is also noticed. Note de contenu : - Table 1. Mechanical characteristics of the skins
- Table 2. Mechanical characteristics of the core
- Table 3. Average values of energy release rate (GIC)DOI : https://doi.org/10.18280/rcma.310402 En ligne : https://www.iieta.org/download/file/fid/60226 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37672
in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 31, N° 4 (08/2021) . - p. 193-197[article]Experimental investigation of mechanical behaviour and damage of bio-sourced sandwich structures based on date palm tree waste and cork materials / Hocine Djemai in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 32, N° 5 (10/2022)
[article]
Titre : Experimental investigation of mechanical behaviour and damage of bio-sourced sandwich structures based on date palm tree waste and cork materials Type de document : texte imprimé Auteurs : Hocine Djemai, Auteur ; Tarek Djoudi, Auteur ; Adnane Labed, Auteur Année de publication : 2022 Article en page(s) : p. 215-222 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Agglomération (matériaux)
Composites à fibres végétales -- Propriétés mécaniques
Construction sandwich -- Détérioration
Délaminage
Endommagement (mécanique)
Epoxydes
Liège
Palmiers et constituants
Rigidité (mécanique)Index. décimale : 668.4 Plastiques, vinyles Résumé : The date palm is a giant plant that must be cleaned annually, which can be the first source various raw materials compared to other woods that are cleaned once every four years, such as cork. In Algeria, there are millions of palm trees that produce a significant amount of raw materials annually, but unfortunately they are not exploited in industry. This paper presents an experimental study on mechanical behaviour of four bio-sourced sandwich materials differentiated by their core types. The skins of these sandwiches are made composite material composed of rachis fibers and epoxy resin; however the cores are made of: 1) raw petiole and petiole agglomerate with two sizes (0 -1 mm and 1-3 mm) and 2) cork agglomerate for comparison. The comparison between these sandwiches is based on the overall stiffness which is determined by three point bending tests. The results obtained for all sandwich materials show that the overall stiffness of the Petiole agglomerate with the size (0mm-1mm)/rachis fibers-epoxy resin is higher than the other sandwiches. Thus, we have carried out a complementary damage study to this last sandwich material based on delamination tests. It turns out through this study the good resistance of this new sandwich to delamination compared to other previously studied materials. Note de contenu : - MATERIALS AND METHODS : Natural materials - Matrix - Composite material - Mechanical tests
- RESULTS AND DISCUSSION : Three-point bending tests of skins - Three-point bending tests of sandwiches - Delamination tests of sandwiches
- Table 1 : Values of elasticity modulus of raw petiole
- Table 2 : Values of elasticity modulus of cork agglomerate
- Table 3 : Values of elasticity modulus (E) of petiole agglomerate differentiated by granules size
- Table 4 : Values of modulus elasticity (Ef) of composite material (RFE)
- Table 5 : Overall stiffness (DG) values in different sandwichesDOI : https://doi.org/10.18280/rcma.320501 En ligne : https://iieta.org/download/file/fid/83265 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38601
in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 32, N° 5 (10/2022) . - p. 215-222[article]Réservation
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