[article]
| Titre : |
Effects of hydrothermal seawater aging on the mechanical properties and water absorption of glass/aramid/epoxy hybrid composites |
| Type de document : |
texte imprimé |
| Auteurs : |
Z. A. Oguz, Auteur ; A. Erklig, Auteur ; Ö. Y. Bozkurt, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 79-93 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Aramides Les polyamides aromatiques, ou aramides, sont une classe de matériaux résistant à la chaleur et/ou présentant de bonnes propriétés mécaniques. Ils ne peuvent être utilisés que comme fibres, qui servent surtout à la fabrication de matériaux composites, en renfort de matrices.
Le mot-valise "aramide" vient de la contraction de l'anglais aromatic polyamide.
Les fibres sont obtenues par filage (étirage au travers d'une filière) à partir d'une dissolution. Les chaînes moléculaires sont fortement orientées dans le sens de l'axe de la fibre, de sorte que les forces des interactions moléculaires peuvent être exploitées pour la résistance thermique et/ou mécanique.
Composites à fibres de verre
Composites à fibres de verre -- Détérioration
Détérioration hydrothermale
Epoxydes
Essais de résilience
Humidité -- Absorption:Eau -- Absorption
|
| Index. décimale : |
668.4 Plastiques, vinyles |
| Résumé : |
With the increase in the diversity of applications, the effect of environmental conditions on the mechanical properties of polymeric composites have become more valuable due to the sensitivity of polymers to aging. In this study, an experimental investigation was carried out to study the seawater aging effect on the flexural and low-velocity impact behavior of glass/aramid/ epoxy hybrid composites. Four types of composite groups that are [G6]S, [A6]S, [G3A3]S, [A3G3]S manufactured by vacuum infusion method were immersed in seawater at 25 °C and 70°C for 1000 h. Mechanical tests were conducted under three different conditions, namely, dry, wet, re-dried. As temperature increases, the water gain ratio also increases for all composite groups. Flexural strength was significantly reduced with seawater absorption for the wet state tested groups at each temperature. The reductions in flexural strength of the re-dried test groups are less than in the wet state test samples. Charpy test results showed that as the composite groups were exposed to hydrothermal aging, the impact strength of the plain glass/ epoxy, GAG/epoxy, and AGA/epoxy hybrid composite decreased. SEM analysis showed that as temperature increases, delamination and fiber/matrix cracks also increases. |
| Note de contenu : |
- MATERIALS AND METHODS : Materials and specimen fabrication - Hydrothermal aging - Flexural test - Charpy and notched impact tests
- RESULTS AND DISCUSSION : Hydrothermal aging - Flexural tests - Low-velocity impact test - SEM and imagining results
- Table 1 : Material properties
- Table 2 : Thickness of produced composites
- Table 3 : Sea water absorption parameters of composite groups
- Table 4 : Flexural properties of the specimens
- Table 5 : The increase/decrease of impact strength of composite groups |
| En ligne : |
https://drive.google.com/file/d/1bLlKjBCBUytUFzY7_2AyQD_ZQvChxxcn/view?usp=shari [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36353 |
in INTERNATIONAL POLYMER PROCESSING > Vol. 36, N° 1 (2021) . - p. 79-93
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Effects of hydrothermal seawater aging on the mechanical properties and water absorption of glass/aramid/epoxy hybrid composites in INTERNATIONAL POLYMER PROCESSING, Vol. 36, N° 1 (2021)
