The paper discusses the mechanical and physical behaviour of hybrid glass fibre reinforced plastic (GFRP). Hybrid GFRP was fabricated by three different types of glass fibre, namely, 3D, woven, and chopped, which were selected and combined with mixture of polyester resin and hardener. The hybrid GFRP was investigated by varying three parameters which were the composite volume fractions, hybrid GFRP arrangement, and single type fibre. The hybrid GFRP was fabricated by using open mould hand lay-up technique. Mechanical testing was conducted by tensile test for strength and stiffness whereas physical testing was performed using water absorption and hardness. These tests were carried out to determine the effect of mechanical and physical behaviour over the hybrid GFRP. The highest volume fraction of 0.5 gives the highest strength and stiffness of 73 MPa and 821 MPa, respectively. Varying hybrid fibre arrangement which is the arrangement of chopped-woven-3D-woven-chopped showed the best value in strength of 66.2 MPa. The stiffness is best at arrangement of woven-chopped-woven-chopped-woven at 690 MPa. This arrangement also showed the lowest water absorption of 4.5%. Comparing the single fibre type, woven had overtaken the others in terms of both mechanical and physical properties.
The study discussed the mechanical properties of hybrid arrangement of glass and Kenaf fibre reinforced plastic (FRP). There are two types of hybrid arrangementscomparedwith one controlled arrangement of 100% Kenaf fibre. The glass fibre types used in the study are chopped, woven and 3-dimensional. The FRP was fabricated via hand lay-up method using the two types of matrix namely epoxy 1,2 and polyester resins. Parameters evaluated were fibre hybrid FRP arrangement and fibre orientation for the two types of composite with two different matrix resins. The mechanical properties evaluated on the hybrid FRP arrangement are tensile strength, elastic modulus, elongation at break and water absorption. The mechanical properties of 36 composites samples were conducted by Instrons Machine 3382 according to ASTM D-638-10a. The physical property of nine samples was performed using water absorption according to ASTM D 570-99. These tests were carried out to determine the effect of mechanical behaviour for all hybrid FRP arrangements. It was found that hybrid FRP arrangement #1 with layers of fibreglass 3D-woven-chopped-woven-3D give the outstanding properties both in polyester and epoxy matrices. However, adding Kenaf reduce the mechanical properties and increase water absorption.
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