International Journal of Photochemistry and Photobiology 2020; 4(1): 11-16 http://www.sciencepublishinggroup.com/j/ijpp doi: 10.11648/j.ijpp.20200401.12 ISSN: 2640-4281 (Print); ISSN: 2640-429X (Online) Effect of Lay-up Placement on Physical Properties of Hybrid Composite Reinforced E-glass/Kevlar 49 Subhan Ali Jogi 1, * , Moazam Baloch 2 , Asif Shah 1 , Zubair Laghari 1 , Inamullah Maitlo 1 , Ifikhar Memon 1 1 Department of Metallurgy and Materials Engineering, Dawood University of Engineering and Technology, Karachi, Pakistan 2 Department of Metallurgy and Materials Engineering, Mehran University of Engineering and Technology, Jamshoro, Pakistan Email address: * Corresponding author To cite this article: Subhan Ali Jogi, Moazam Baloch, Asif Shah, Zubair Laghari, Inamullah Maitlo, Ifitkhar Memon. Effect of Lay-up Placement on Physical Properties of Hybrid Composite Reinforced E-glass/Kevlar 49. International Journal of Photochemistry and Photobiology. Vol. 4, No. 1, 2020, pp. 11-16. doi: 10.11648/j.ijpp.20200401.12 Received: April 30, 2019; Accepted: June 23, 2019; Published: January 10, 2020 Abstract: Hybrid composites have developed and demanding industrial application and replaced metals and non-metal by specific characteristics. The research work concerned with E- glass epoxy and E-glass / Kevlar 49 reinforcement epoxy. The reinforcing materials oriented at 0°/90°, 45°/45° and 30°/60° lay-up placement. The laminate was produced by hand lay-up method Vacuum Bagging Resin Transfer Molding Technique is used for air escape from the mold cavity for effective adhesion between layers of structural composites. The experimental results achieved by conducting hardness of the samples by following the ASTM standard. The ASTM D-2240 durometer was made to perform hardness over the standard samples. The water absorption characteristics of each specimen of different orientation were observed at different humidity level. Electronic weighing balance ASTM D-570 and Electronic densimeter ASTM D-792 was used for water absorption and density respectively. GFK-0°/90° (Glass fiber and Kevlar 0°/90°) has good hardness result and low density, GF 0°/90° has higher density and low water absorption and GFK 30°/60° has higher capability to absorb water than other orientations, Higher density explain the internal structure with low porous structure which has been confirmed due to low water absorption of this material. Keywords: Hybrid Composites, Hardness, Density, Water Absorption, Glass/Kevlar Fiber Reinforcement, Epoxy, VRTM, Strength-to-Weight 1. Introduction Hybrid composite fabricated by dissimilar reinforcement fibers with strong adhesive materials and has tremendous application in automobile body parts, marine, bulletproof and heat resistance vests for lightweight and specific strength [1- 3]. Kevlar (aramids) is the well known low density, high strength fibers and extensively employed in Aircraft structure, protective shields for body armors and lightweight Sports goods [4-6]. In hybridization synthetic/ natural fiber stacked layer by layer to produce a structure having inter- laminar fracture toughness which cannot be achieved by conventional man-made materials. Kevlar/E-glass fibers reinforced epoxy resin has a specific strength and specific stiffness [7, 8]. The lay-up placement of fibers with advance adhesive thermosetting resin significantly affects the mechanical properties of the hybrid composite. E-glass fibers have better ultimate tensile strength and placed outside layer in lamination to produce a flaw-free structure. For lightweight, high strength reinforcement, the aramid fibers/ glass fibers have a profound achievement to fabricate the laminate. There is no significant difference in density by changing lay-up placement in hybridization [9]. In stacking sequence lamination, the thickness of the sheet is around 3- 4mm according to ASTM standard. As far as cost competitiveness is concerned the glass fibers are cheaply and easily available in the market with low price whereas Kevlar