Effect of Sisal Fiber Direction Angle on Physical and Mechanical Properties of Composites

: Research on the effect of sisal fiber angle on density, water absorption, porosity, flexural strength, impact strength, and tensile strength of sisal-epoxy resin composite fibers. Composites are made by hand lay out method in the composition of sisal fiber material: epoxy resin = 10 wt% : 90 wt% with the fiber angle orientation layout at: 0°, 30°, 45°, 60°, 90°. Composite properties obtained have an average density of 1.2 g/cm 3 , water absorption increases linearly, and porosity of composites rises linearly to changes in angle increment which is greater and has flexural strength, impact strength, composite tensile strength linearly decreases to changes in the incremental angle. Optimal mechanical properties occur at the angle of fiber 0°, this is due to the long fiber direction, in the direction of the tensile force which is at 0°. The length of each fiber at 30°, 45°, 60°, 90°, will have lower mechanical properties, due to the shorter load distribution.