Nihal YUMAK, Kubilay ASLANTAŞ, Yeliz PEKBEY

Hibritleştirmenin Nano Takviyeli Hibrit Kompozit Plakaların Balistik Darbe Davranışlarına Etkisi

Hibrit kompozitler, özellikle yüksek mekanik özelliklere karşılık düşük yoğunluk istenen havacılık, uzay ve balistik uygulanmalarda en çok tercih edilen malzeme çeşididir. Hibrit kompozitler bu çalışmada, takviye malzemesi olarak, yüksek dayanımlı Kevlar fiber ve S-cam fiber olarak kullanılmıştır. Matris olarak ise yüksek enerji emilimi sağlayan sağlayan üç tip (nano-kalsit, nano-kil ve nano-karbon tüp) kullanılarak 19 farklı kombinasyonda hibrit kompozit malzeme üretilmiştir. Hibrit kompozitlerin balistik test sonuçlarını karşılaştırmak için 1 nano malzeme takviyesi olmayan kontrol numunesi test edilmiştir. Nano-parçacıklar dolgu malzemeleri kompozit malzeme içerisine 0,5, 1 ve % 2 oranlarında, literatürden elde edilen maksimum mekanik özelliklere karşılık gelen optimum oranlarda katılmıştır. Testler sonrası malzeme arka yüzeyinde meydana gelen çökme değerleri ölçülmüş ve malzemede delinme olup olmama durumu değerlendirilmiştir. Çalışma sonucunda, nano parçaçık takviyesi yapılarak malzemenin balistik dayanımının arttırılabileceği, sıralamanın değiştirilmesiyle birlikte balistik dayanımın arttığı görülmüştür. S-glass eklenerek üretilen hibritlerde, ağırlık %20 oranında düşürülse de, balistik dayanım azalmıştır. Kalsit takviyeli plakaların ön yüzeyde, kil takviyeli tabakaların arka yüzeyde olduğu durumda balistik dayanım artmıştır. Kalsit miktarının arttırılmasıyla birlikte malzemenin balistik dayanımı artmıştır.

Anahtar Kelimeler:

Balistik darbe, hibrit kompozit, nano-kil, nano-kalsit, nano-karbon, polimer matrisli kompozit

The Effect of Hybridization on the Ballistic Impact Behavior of Nanostructured Hybrid Composite Plates

Hybrid composites are the material group largely preferred for use in space, aerospace and ballistic applications, where superior mechanical properties and low density are required. Hybrid composites produced using high-strength Kevlar fiber and S-glass fiber materials and nano particle added matrix in this study. Nineteen combinations of hybrid composite materials were produced using three matrix materials—nano-calcite, nano-clay and carbon nano-tube which have high-energy absorption properties. To compare the ballistic test results of hybrid composites, 1 control sample were tested. Nano particles were added into the composites in the ratio of 0.5, 1 to 2 percent, corresponding to the ratios that achieved the most desirable mechanical properties in other literature. Deflections occurring at composites’ back surfaces were measured after tests and evaluation of whether there would be perforation was done. As a result of this study, was seen that ballistic strength positively affected with nano particle addition and different stacking sequences of composite layers. In hybrid composites produced by S-glass reinforcement, the weight decreased by 20% while the ballistic strength decreased significantly. It was found that calcites adding hybrid composite plates at the front sites and clay added plates at the back sites showed superior ballistic performance. It was observed that the ballistic strength of hybrid composites increased with increasing calcite ratio at the front sites.

Keywords:

polymer–matrix composites ballistic impact, hybrid composite, nano-clays, nano-calsit, nano-carbon, polymer–matrix composites,

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