Grafen Nanopul Takviyeli Çapraz Katlı E-cam lifi/Epoksi Tabakalı Kompozit Malzemelerin Eğilme Davranışı

Bu çalışmada grafen nanopul takviyesinin E-cam lifi/epoksi tabakalı kompozit malzemenin esneklik mukavemeti üzerine etkisi deneysel olarak araştırılmıştır. Grafen nanopul takviyeli ve takviyesiz, [0o/90o]3S fiber oryantasyonuna sahip kompozit malzemeler el yatırma ve vakum torbalama yöntemiyle imal edilmiştir. Epoksi içerisine ağırlıkça üç farklı oranda (% 0.25, 0.5 ve 1) grafen nanopul eklenmiştir. Üretimi yapılan plakalar su jeti kesme makinasıyla kesilerek üç nokta eğme test numuneleri elde edilmiştir. Daha sonra ASTM D790 standardına göre üç nokta eğme testleri yapılmıştır. Destek silindirlerinin merkezleri arasındaki mesafe/kompozit numune kalınlığı oranı (s/t) tüm testlerde 16 olarak seçilmiştir. Elde edilen sonuçlara göre epoksi matris içerisine grafen nanopul eklenmesi, tabakalı kompozit malzemenin esneklik mukavemetini artırmıştır. Epoksi matris içerisine ağırlıkça % 0.25, 0.5 ve 1 oranlarında grafen nanopul katıldığında esneklik mukavemetinde sırasıyla % 4.32, 12.88 ve 7.03’lük bir artış olmuştur.

Flexural Behavior of Graphene Nanoplatelets Reinforced Cross-Ply Eglass/ epoxy Laminated Composite Materials

In this study, the effect of graphene nanoplatelets reinforcement on the flexural strength of Eglass/epoxy laminated composite material was investigated experimentally. [0⁰/90⁰]3S oriented compositematerials with and without graphene nanoplatelets reinforcement were manufactured by using hand lay-up andvacuum bagging method. Graphene nanoplatelets at three different ratios (0.25, 0.5 and 1 wt.%) were added tothe epoxy. The produced plates were cut with a water jet cutting machine to obtain three-point bendingspecimens. Then, three-point bending tests were performed according to the ASTM D790 standard. The spanbetween the centers of support cylinders/composite specimen thickness ratio (s/t) was selected as 16 in all thetests. Results indicate that the addition of graphene nanoplatelets to the epoxy matrix increased the flexuralstrength of the laminated composite material. When the graphene nanoplatelets at ratios of 0.25, 0.5 and 1 wt.%were added to the epoxy matrix, the flexural strengths increased by 4.32%, 12.88% and 7.03% respectively.

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