Mete Han BOZTEPE, Melih BAYRAMOĞLU, Necdet GEREN, Çağrı UZAY

Alternatif FML Kompozitler için Titanyum ve Elyaf/Epoksi Ara Yüzey Dayanımının İncelenmesi

Elyaf takviyeli polimer kompozit yapılar, hafifliğin yanı sıra yüksek mukavemete sahip olup nem,korozyon gibi çevresel etmenlere karşı direnç gösterirler ancak ani darbe yüklerine karşı zayıf vekırılgandır. Bu yüzden araştırmacılar özellikle uzay-havacılık ve savunma sanayi alanları için elyaf vemetal malzemeleri bir arada lamine ederek FML (Fiber Metal Laminate) kompozitleri geliştirmişlerdir.FML kompozitler elyaf ve metallerin avantajlarını bir araya getirirken dezavantajlarını ise elimineetmektedir. Fakat elyaf ve metal katmanların ara yüzey dayanımının tespiti FML kompozitin etkinliğiüzerinde önemli rol oynamaktadır. Bu çalışmada metal olarak TiGR2 serisi titanyum ve elyaf olarak ±45ºoryantasyonlu karbon ve cam kullanılarak ASTM D 5868 standardına göre üretilen kompozitlerin arayüzey dayanımları araştırılmıştır. Vakum torbalama yöntemi ile üretilen elyaf kompozitlerde kullanılanepoksi matris malzemesi metal yüzeylerin yapıştırılmasında da kullanılmıştır.

Investigating the Interfacial Strength of Titanium and Fiber/Epoxy for The Alternative FML Composites

Fiber-reinforced polymer composites provide high strength to weight ratio, resist to environmental effects, but they have poor impact strength due to brittleness. Therefore, researchers have developed fiber metal laminates (FMLs) particularly for aerospace, aviation and defence industries. FML composites combine the advantages of both metal alloys and fibers but eliminate their drawbacks. However, the bonding strength of fiber-metal interface plays an important role for effectiveness of FML composites. In this study, the interfacial strength values of TiGr2 series titanium sheets and ± 45º oriented fiber/epoxy composites (glass and carbon) were investigated by applying single lap shear tests based on ASTM D 5868. Epoxy based adhesive was used as a matrix during manufacturing for joining titanium sheets to composite laminates.

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