International Journal of Students’ Research in Technology & Management eISSN: 2321-2543, Vol 6, No 2, 2018, pp 70-76 https://doi.org/10.18510/ijsrtm.2018.6210 70 |www.ijsrtm.in ©Authors MECHANICAL PROPERTIES OF SISAL/GLASS FIBER REINFORCED HYBRID COMPOSITES: A REVIEW 1 *Govind Pathak, 2 Om Prakash Dubey, 3 Prafful Kumar Manoharan. 1 AISECT University, Bhopal-Chiklod Road, Raisen, M. P. – 464993, India. 2 Veer Kunwar Singh University, Ara, Bihar – 802301, India. 3 Birla Institute of Technology (Mesra), Jharkhand – 815142, India. Email: latehartourism@gmail.com , omprakashdubeymaths@gmail.com , prafkumarm@gmail.com Article History: Submitted on 28 th January, Revised on 12 th February, Published on 5 st March 2018 Abstract. The natural fiber-reinforced polymer composite is swiftly growing both in phrases of their industrial applications and fundamental research. They are renewable, cheap, absolutely or in part recyclable and biodegradable. The incorporation of herbal fibers consisting of sisal with glass fiber hybrid composites has additionally received growing industrial packages. Herbal and synthetic fibers are mixed in the same matrix (unsaturated polyester) to make sisal/glass fiber hybrid composites and the mechanical residences of those hybrid composites had been studied. A giant development in mechanical homes of sisal/glass fiber hybrid composites has been observed. the chalk powder (additive) is likewise introduced to the resin (unsaturated polyester) in proportions of 1%, 2%, 3% by way of weight of resin respectively and sisal/glass fiber hybrid composites were organized through the usage of this resin to take a look at the effect of chalk powder on mechanical homes of those hybrid composites. It is also found that because the chalk powder quantity increases tensile and flexural residences are decreases. Keywords. Sisal/glass fiber reinforced hybrid composites, Unsaturated polyester resin, Chalk powder. INTRODUCTION Now-a-days the engineers are searching for structural materials which have low density, high strength, stiffness, abrasion, impact resistance, low thermal expansion and corrosion resistance, at lower cost. In order to achieve above requirements it requires combining two or more different materials to get composite materials. When two or more materials with different properties are combined together, they form a composite material. Composite material comprise of strong load carrying material (reinforcement) imbedded with weaker materials (matrix). Composites can be classified according to different criteria. Particle reinforced composites also called particulate composites consisting of reinforcing material that is in the form particle. The shape of reinforcing particle may either spherical, a platelet, cubic, tetragonal, or of other regular or irregular geometry. The arrangement of the particles in the composites may be either random or preferred orientation. Generally, particles are used in composites to modify the thermal and electrical conductivities, improve performance at elevated temperatures, reduce friction, increase wear and abrasion resistance, improve mach inability, increase surface hardness and reduce shrinkage. Fiber reinforced polymer composites also called fibrous composites consisting of fibers as the reinforcement. Now-a-days, these composites have found applications in various areas such as automotive, marine, aerospace etc. due to their high specific stiffness and strength. Hybrid Composites are relatively new and obtained by using two or more kinds of fibers in single matrix. The hybrid composites have a better all around combination of properties than the composites containing single fiber type. Example the fibers may be aligned and mixed one another, the hybrid composites produced with the fiber mixer is one method. Due to the growing global energy crisis and ecological risks, natural fibers reinforced polymer composites have attracted more research interests. The main advantages of natural fibers are their availability, biodegradable, renewable, environmental friendly, low cost, low density, high specific properties, good thermal properties, enhanced the energy recovery, low energy consumption, non-abrasive nature and low cost [1, 2]. In the recent years there is a vast growth in natural fiber based polymer composites due to its various attractive features likes biodegradability, no abrasiveness, flexibility, availability, low cost, light weight etc. Different researchers have performed various experiments to enhance the mechanical properties of natural fiber based polymer composites [3, 4, 5, 6, 7, 8, 9, 10, 11].