Untreated Sisal Fiber Polyester Composite 30 25 20 15 10 5 0 10 12 14 16 18 20 22 24 26 28 30 Fiber Volume Fraction (%) Tensile Strength (Mpa) 2mm Thick Specimen 3mm Thick Specimen 4mm Thick Specimen 5mm Thick Specimen 6mm Thick Specimen Fig. 35.1 Variation of tensile strength of untreated sisal fiber reinforced polyester composites with fiber volume fraction Table 35.2 Flexure strength of untreated sisal fiber reinforced polyester composites SI No. Thickness (mm) Fvfa (%) Width (mm) Gauge (mm) Ultimate load (kN) Flexure strength (MPa) 1 2 10 13 40 0.076 087.347 2 2 15 13 40 0.084 097.183 3 2 20 13 40 0.089 103.246 4 2 25 13 40 0.096 110.934 5 2 30 13 40 0.088 101.723 6 3 10 13 60 0.130 099.827 7 3 15 13 60 0.140 107.692 8 3 20 13 60 0.148 113.769 9 3 25 13 60 0.179 137.308 10 3 30 13 60 0.147 113.077 11 4 10 13 80 0.185 106.615 12 4 15 13 80 0.203 116.923 13 4 20 13 80 0.210 121.153 14 4 25 13 80 0.250 144.230 15 4 30 13 80 0.207 119.461 16 5 10 13 100 0.239 110.384 17 5 15 13 100 0.260 120.000 18 5 20 13 100 0.280 129.230 19 5 25 13 100 0.320 147.692 20 5 30 13 100 0.260 120.000 21 6 10 13 120 0.296 113.836 22 6 15 13 120 0.322 123.846 23 6 20 13 120 0.350 134.615 24 6 25 13 120 0.394 151.538 25 6 30 13 120 0.360 138.273 Note: aFiber volume fraction 35 A Study on Mechanical Properties of Raw Sisal Polyester Composites 291
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