The Effect of The Number of Kevlar Layers Impregnated Nano SiC on Ballistic Resistance of Hybrid Laminated Al7075 Composites as Lightweight Material

Materials that are applied to combat vehicles require an innovation as the development of the military world advances. The material innovation in this research is a lightweight hybrid laminated Al7075 composite sample. The main materials used in this research are aluminum 7075 plate, kevlar 29, silicon carbide (SiC) nano powder, and epoxy resin. Initially SiC nano powder was mixed with polyethylene glycol-400 (PEG-400). Then ethanol was added to this mixture so that it became a shear thickening fluid (STF) solution which was used to impregnate kevlar. Laminated composite samples were prepared using the hand lay-up method with epoxy resin as an additive between layers of kevlar and aluminum 7075 plates. The thickness of laminates was related to the number of kevlar layers. The results of this study showed that the composite samples with impregnated kevlar had higher ballistic and impact resistance values compared to the composite to their non-impregnated counterparts. The Fourier Transfer Infrared Spectrometry (FTIR) was used to determine the level of absorbance of the functional groups in the impregnated Kevlar. Scanning Electron Microscopy (SEM) was employed to investigate the distribution of nano SiC fillers in kevlar fiber.