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REVUE DES COMPOSITES ET DES MATERIAUX AVANCES . Vol. 32, N° 5Mention de date : 10/2022Paru le : 15/10/2022 |
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Ajouter le résultat dans votre panierExperimental 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
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Code-barres Cote Support Localisation Section Disponibilité 23828 - Périodique Bibliothèque principale Documentaires Disponible Study the ideal proportions of matrix, reinforcing materials and additives to obtain a composite material with high tensile strength / Touil Issam in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 32, N° 5 (10/2022)
[article]
Titre : Study the ideal proportions of matrix, reinforcing materials and additives to obtain a composite material with high tensile strength Type de document : texte imprimé Auteurs : Touil Issam, Auteur Année de publication : 2022 Article en page(s) : p. 243-251 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Composites à fibres de verre -- Propriétés mécaniques
Composites à fibres végétales -- Propriétés mécaniques
Essais dynamiques
Matériaux hybrides
Polyesters insaturésLes résines de polyesters insaturés (UP) sont obtenues par polycondensation
d’un ou de plusieurs diacides avec un ou plusieurs glycols, l’un, au moins, des constituants contenant une double liaison éthylénique susceptible de réagir ultérieurement sur un composé vinylique, acrylique ou allylique.
Par le terme résine polyester, on désigne en fait la dissolution du prépolymère polyester insaturé dans un solvant copolymérisable, le plus utilisé étant le styrène. C’est sous cette forme liquide que les résines polyesters sont livrées aux transformateurs.
Après addition de différents adjuvants, charges et renforts, divers procédés de transformation provoquent, sous l’action d’un système catalytique approprié, la copolymérisation finale de la résine en un objet thermodurcissable.
Les polyesters insaturés sont d’un usage relativement ancien (1950), essentiellement
dans le bâtiment (moulage au contact). Ils ont connu un renouveau important à partir de 1980, en particulier au niveau des formulations et de la fiabilité des procédés grâce au développement de technologies industrielles de moulage par injection et par compression dans l’industrie automobile.
Résistance à la traction
Sciure de boisIndex. décimale : 668.4 Plastiques, vinyles Résumé : In this research, a statistical research methodology was used for a composite material consisting of a matrix of "unsaturated polyester" with different weight percentages reinforced with glass fibers with different weight percentages as well, in addition to sawdust with the following percentages 0%, 01%, 05%, 10% and this is in order to Knowing the weight ratio range for each of: Matrix / Reinforcement Material / Additive (Unsaturated Polyester / Glass Fiber / Sawdust - Po / gf / sd) to obtain a composite material with high mechanical properties - resistance to tensile forces. By analyzing the results of tensile tests to select the ideal test samples, we conclude that the recommended mass field or peak field is best for obtaining a composite material with high properties - resistance to tensile forces - consisting of an unsaturated polyester matrix reinforced with 300 g/m2 glass fibers added to sawdust as follows: The mass of unsaturated polyester - from 65% to 75% and from 20% to 30% of the mass of fiberglass contains the mass of the additive - sawdust in the amount of 1% to 10%, and this is in relation to the total mass of the sample of the composite material. Note de contenu : - INTRODUCTION : Composite material - Reinforcing material - Sawdust2
- RESEARCH CONTRIBUTION AND OBJECTIVES
- MATERIALS AND METHODS : Set 1 : in this set of specimens, we used - SET II3 - Specimens'preparation - Method
- TENSILE TEST : Examination steps
- RESULTS AND DISCUSSION : Tensile results for the first set Po / gf /sd 00 - Results of the tensile tests for the second set: Po / gf /sd 01 - Results of the tensile tests for the third set: set: Po / gf /sd 05 - Results of the tensile tests for the fourth set: Po / gf /sd 10 Graphs - Discussion and analysis
- Table 1 : State coding table Mass ratios of unsaturated polyester resin/ Mass of Glass fiber
- Table 2 : Mass ratios of unsaturated polyester resin % / glass fiber reinforcement %
- Table 3 : State coding table Mass ratios of unsaturated polyester resin/ Mass of Glass fiber + 01% Mass of sawdust
- Table 4 : Weight ratios of unsaturated polyester resin material and glass fiber reinforcement + 01 %wt added sawdust
- Table 5 : State coding table Mass ratios of unsaturated polyester resin/ Mass of Glass fiber + 05% Mass of sawdust
- Table 6 : Weight ratios of unsaturated polyester resin material and glass fiber reinforcement + 05 %wt added sawdust
- Table 7 : State coding table Mass ratios of unsaturated polyester resin/ Mass of Glass fiber + 10 % Mass of sawdust
- Table 8 : Weight ratios of unsaturated polyester resin material and glass fiber reinforcement + 10 %wt added sawdust
- Table 9 : Results of the tensile for the first set
- Table 10 : Tensile strength results for a composite material based on unsaturated polyester reinforced by glass fiber + 1% sawdust
- Table 11 : Tensile strength results for a composite material based on unsaturated polyester reinforced by glass fiber + 05% sawdust
- Table 12 : Tensile strength results for a composite material based on unsaturated polyester reinforced by glass fiber + 10% sawdustDOI : https://doi.org/10.18280/rcma.320505 En ligne : https://iieta.org/download/file/fid/83266 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38603
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Code-barres Cote Support Localisation Section Disponibilité 23828 - Périodique Bibliothèque principale Documentaires Disponible Analysis of dielectric properties of PVA-PEG-In2O3 nanostructures for electronics devices in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES, Vol. 32, N° 5 (10/2022)
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Titre : Analysis of dielectric properties of PVA-PEG-In2O3 nanostructures for electronics devices Type de document : texte imprimé Année de publication : 2022 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Conduction électrique
Diélectriques
Oxyde d'indiumL'oxyde d'indium(III) (In2O3) est un composé chimique, un oxyde amphotère d'indium. (Wikipedia)
Polyacétate de vinyle
Polyéthylène glycolIndex. décimale : 668.4 Plastiques, vinyles Résumé : The dielectric characteristics of PVA/PEG/In2O3 nanostructures were tested to use in various electric nanodevices. The films of nanostructures of PVA/PEG/In2O3 were synthesized by casting solution technique. The dielectric characters of PVA/PEG/In2O3 nanostructures were determined. Results expressed that the dielectric parameters of PVA/PEG were rise with rise in the In2O3 NPs ratio. The performance of ε', ε" and σAC with frequency illustrated that the ε' and ε" reduced whereas the σAC rises with rise in frequency. The final results demonstrated the PVA/PEG/In2O3 nanostructures may be suitable in various electrical nanodevices. DOI : https://doi.org/10.18280/rcma.320507 En ligne : https://iieta.org/download/file/fid/83268 Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38604
in REVUE DES COMPOSITES ET DES MATERIAUX AVANCES > Vol. 32, N° 5 (10/2022)[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 23828 - Périodique Bibliothèque principale Documentaires Disponible