This study explores the effects of nanoclay addition on mechanical response of Glass/Carbon/Glass fiber (G/C/G) reinforced epoxy matrix composite laminates under tensile and flexural loadings. Organomodified nanoclay containing Glass/Carbon/Glass hybrid composite laminate was evaluated for dynamic mechanical properties as well as mechanical strength, stiffness and ductility. Three different weight fractions of nanoclay containing fiber reinforced hybrid composites were manufactured. The amount of nanoclay additions were 0 wt %, 0.75 wt % and 1.25 wt % with respect to epoxy resin and hardener. A nanoclay containing epoxy-Glass/Carbon/Glass hybrid composite laminate were manufactured by using a hydraulic hot press. Then, tensile, flexural tests and dynamic mechanic analysis (DMA) was implemented to ASTM standard specimens which were cut from the plates by using abrasive water jet cutter. Uniaxial tensile and three-point bending tests have been carried out to obtain some mechanical characteristics such Young's modulus, tensile strength, break strain, flexural strength and modulus of the hybrid composites. DMA measurements also performed to compare nanoclay effect. The results of this study demonstrated that the mechanical behavior was positively affected by nanoclay addition into epoxy resin. The tensile strength and flexural strength significantly increased compared to the non-nanoclay hybrid composite (pure). However glass transition temperature (T g) of hybrid composites decreased with increasing amount of nanoclay.

The objective of this study was to produce the hybrid carbon/fiberglass composite laminates, to characterize their mechanical properties under room temperature and to evaluate the effect of nanoclay addition into epoxy matrix on the mechanical properties of the hybrid composites. During fabrication of fiber reinforced polymer composites, the organo modified nanoclay (0%, 0.5%, 0.75%, and 1.25% of nanoclay reinforcement by weight) was mixed with epoxy system using an ultrasonic mixer. The produced matrix was then applied onto fibers by using hand layup method. Mechanical tests were performed to investigate the effect of nanoclay content on tensile and flexural properties of the fabricated hybrid carbon/fiberglass composites. The tensile and three point bending tests were performed according to ASTM D3039 and ASTM D7264, respectively, to measure the highest tensile strength, modulus of elasticity and bending modulus of the hybrid laminates. Experimental results show that the tensile and flexural performance of hybrid carbon/fiberglass composites was changed with the nanoclay content.

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The low-velocity impact (LVI) response of the plain-weave glass/epoxy laminated composites, which were reinforced with various contents of carbon nanotubes (CNTs) was performed using a drop-weight Fractovis Plus impact machine. The nanocomposite plates were fabricated using hand lay-up (HLU) method. The effect of carbon nanotube addition into the epoxy resin is examined. The influence of the nanocarbon contents on the impact response was achieved by using 1 wt%, and 1.25 wt%. The lowvelocity impact responses of the nanocomposite plates were compared, and the effect of CNT on the damaged area after impact was also discussed. The fillers adding changes the low-velocity impact (LVI) response of the plain-weave glass/epoxy laminated composites. Experimental results clearly demonstrated that the samples fabricated by various contents of carbon nanotube (CNTs), have a bigger damage area and more penetration threshold than the control samples (neat). Moreover, the plates with 1 wt % carbon nanotubes have the highest reaction force. Keywords:Low-velocity impact, Carbon nanotubes (CNTs), Glass/epoxy laminated composites, Damaged mechanism modulus Karbon Nano-Tüp Katkılı Düz Örgü Cam-Epoksi Kompozitlerin Düşük Hızlı Darbe Deneylerinin Deneysel Olarak İncelenmesi ÖzBu çalışmada, Çeşitli oranlarda karbon nanotüp katkılı düz örgü cam epoksi tabakalı kompozitlerin Fractovis Plus darbe cihazı ile düşük hızlı darbeye gösterdikleri tepki araştırılmıştır. Nanokompozit plaklar el yatırma yöntemi ile üretilmiştir. Epoksi reçine içerisine katılan karbon nanotüp etkisi incelenmiştir. Ağırlıkça %1 ve %1,25 oranları kullanılarak nanokarbon içeriğinin etkisi darbe üzerindeki etkisi elde edilmiştir. Nanokompozit plakların düşük hızlı darbe tepkileri karşılaştırıldı ve darbe deneyi sonrası hasar alanı üzerine CNT etkisi incelenmiştir. Eklenen dolgu maddeleri düz örgü cam/epoksi kompozitlerin düşük hızlı darbe tepkilerini değiştirdi. Sonuçlar çeşitli oranlarda CNT katkılı olarak üretilen numunelerin katkısız numuneye göre hem daha büyük hasar alanına hem de daha büyük penetrasyon eşik enerjisine sahip olduğunu göstermiştir. Ayrıca, ağırlıkça %1 CNT oranlı plaklar en yüksek reaksiyon kuvvetine sahiptir.

In this study, both mechanical and thermal properties of epoxy@carbon black nanocomposite (EP@CB-NC) produced by adding 0.3, 0.6, and 1% by weight carbon black nanoparticle obtained from waste automobile tires to epoxy were investigated. The chemical and structural composition of EP@CB-NC was characterized by Fourier transform infrared spectroscopy (FTIR) in scanning electron microscopy (SEM). In addition, simultaneous thermo-gravimetric analysis (TGA), differential scanning calorimetry (DSC) experiments, and thermal conductivity measurements were performed to determine the thermal stability of the prepared EP@CB-NC. Increasing the strength of modified epoxy composites by means of nanoparticles obtained with waste may pave the way for obtaining new materials with clean environment and superior properties. The mechanical and thermal properties were improved by adding carbon black to the bare samples.