| Titre : |
Élaboration et étude des performances mécaniques des composites à matrice polymère : Application de la Méthodologie de Surface de réponse. |
| Type de document : |
texte imprimé |
| Auteurs : |
Asma Benkhelladi, Auteur ; Ali Bouchoucha, Directeur de thèse ; Hamdi Laouici, Directeur de thèse |
| Mention d'édition : |
20 /05 /2021 |
| Editeur : |
جامعة الإخوة منتوري قسنطينة |
| Année de publication : |
2021 |
| Importance : |
152 f. |
| Format : |
30 cm. |
| Note générale : |
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
|
| Langues : |
Français (fre) |
| Catégories : |
Français - Anglais
Génie Mécanique
|
| Tags : |
G. Mécanique: Construction mécanique bio-composites fibres végétales bio-composite hybride RSM ANOVA modélisation optimisation vegetable fibers hybrid composite modeling optimization المواد المدعمة الطبيعية الألياف النباتية المواد المدعمة المركبة نمذجة تحديد الشروط المثالية نمذجة تحديد الشروط المثالية |
| Index. décimale : |
620 Génie Mécanique |
| Résumé : |
Since the appearance of the first resin parts reinforced with synthetic fibers, such as Kevlar fibers, carbon fibers or glass fibers, the use of composite materials in industrial applications has increased for several years (1940) in all industries: automotive, aeronautics, space, marine, construction, medical, etc. On the other hand, composites reinforced with natural fibers have attracted more and more attention due to their low cost, their biodegradability and their availability. The main objective of this work is to develop a new hybrid bio-composite reinforced with natural/natural fibers. The percentages of fibers are obtained by on statistical optimization of the mechanical properties of bio-composites reinforced with the individual fiber composites in the tensile and bending tests. In order to define the optimal material, the following steps were taken: - Firstly, the mechanical properties (tensile and bending) and chemical (TGA, DRX and MEB) of the materials used (resins: polyester and epoxy; fibers: sisal, flax and jute) was carried out. - Secondly, the bio-composites (sisal/polyester, flax/polyester, jute/polyester, sisal/epoxy, flax/epoxy and jute/epoxy) are developed according to the Box-Behnken experimental design and tested in tensile and bending. From these, a modeling and optimization are opted in order to maximize the tensile and flexural mechanical properties in tensile and bending tests. In addition, confirmation of the optimization results was achieved through the development of the new hybrid combinations. - The best tensile results were recorded for a combination of jute fibers and flax fibers (14.4% and 5.6%), treated with bicarbonate for approximately 4 hours. whereas, the best mechanical performance in bending correspond to a reinforcement of 17.4% of jute fiber and 2.6% of sisal fiber, treated with bicarbonate for 5 h 55. - Finally, the effects of input variables such as type of fibers, types of chemical treatment, volume fraction and treatment duration of fiber on the mechanical properties of composite materials were investigated.
|
| Note de contenu : |
Annexes. |
| Diplôme : |
Doctorat |
| En ligne : |
../theses/gmecanique/BEN7753.pdf |
| Format de la ressource électronique : |
pdf |
| Permalink : |
index.php?lvl=notice_display&id=11586 |
Élaboration et étude des performances mécaniques des composites à matrice polymère : Application de la Méthodologie de Surface de réponse. [texte imprimé] / Asma Benkhelladi, Auteur ; Ali Bouchoucha, Directeur de thèse ; Hamdi Laouici, Directeur de thèse . - 20 /05 /2021 . - جامعة الإخوة منتوري قسنطينة, 2021 . - 152 f. ; 30 cm. Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français ( fre)
| Catégories : |
Français - Anglais
Génie Mécanique
|
| Tags : |
G. Mécanique: Construction mécanique bio-composites fibres végétales bio-composite hybride RSM ANOVA modélisation optimisation vegetable fibers hybrid composite modeling optimization المواد المدعمة الطبيعية الألياف النباتية المواد المدعمة المركبة نمذجة تحديد الشروط المثالية نمذجة تحديد الشروط المثالية |
| Index. décimale : |
620 Génie Mécanique |
| Résumé : |
Since the appearance of the first resin parts reinforced with synthetic fibers, such as Kevlar fibers, carbon fibers or glass fibers, the use of composite materials in industrial applications has increased for several years (1940) in all industries: automotive, aeronautics, space, marine, construction, medical, etc. On the other hand, composites reinforced with natural fibers have attracted more and more attention due to their low cost, their biodegradability and their availability. The main objective of this work is to develop a new hybrid bio-composite reinforced with natural/natural fibers. The percentages of fibers are obtained by on statistical optimization of the mechanical properties of bio-composites reinforced with the individual fiber composites in the tensile and bending tests. In order to define the optimal material, the following steps were taken: - Firstly, the mechanical properties (tensile and bending) and chemical (TGA, DRX and MEB) of the materials used (resins: polyester and epoxy; fibers: sisal, flax and jute) was carried out. - Secondly, the bio-composites (sisal/polyester, flax/polyester, jute/polyester, sisal/epoxy, flax/epoxy and jute/epoxy) are developed according to the Box-Behnken experimental design and tested in tensile and bending. From these, a modeling and optimization are opted in order to maximize the tensile and flexural mechanical properties in tensile and bending tests. In addition, confirmation of the optimization results was achieved through the development of the new hybrid combinations. - The best tensile results were recorded for a combination of jute fibers and flax fibers (14.4% and 5.6%), treated with bicarbonate for approximately 4 hours. whereas, the best mechanical performance in bending correspond to a reinforcement of 17.4% of jute fiber and 2.6% of sisal fiber, treated with bicarbonate for 5 h 55. - Finally, the effects of input variables such as type of fibers, types of chemical treatment, volume fraction and treatment duration of fiber on the mechanical properties of composite materials were investigated.
|
| Note de contenu : |
Annexes. |
| Diplôme : |
Doctorat |
| En ligne : |
../theses/gmecanique/BEN7753.pdf |
| Format de la ressource électronique : |
pdf |
| Permalink : |
index.php?lvl=notice_display&id=11586 |
|
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