Issue 44

S. de Barros et alii, Frattura ed Integrità Strutturale, 44 (2018) 151-160; DOI: 10.3221/IGF-ESIS.44.12 154 specimens obtained from was recorded. The Young’s modulus and tensile strength values in both directions (circumferential and axial) were calculated and the results can be seen in Tabs. 2 and 3, respectively. The average circumferential elasticity modulus of the laminate is E θ = 16.60 GPa, the axial elasticity modulus is E z = 9.52 GPa and the Poisson's ratio is ν = 0.1326. Figure 2 : Tensile test set up with an extensometer Specimen Thickness Width Gauge Length Max. tension Young’s (mm) (mm) (mm) (MPa) modulus (GPa) 1 2.0 19.0 50.00 355.45 17.11 2 2.0 19.1 50.00 345.66 16.43 3 2.0 19.1 50.00 350.34 16.66 4 2.0 19.2 50.00 336.70 16.72 5 2.0 19.2 50.00 350.57 16.57 Average 347.74 16.60 Standard deviation 7.08 0.25 Table 2 : Tensile test results of composite laminate along circumferential direction. Specimen Thickness Width Gauge Length Max. tension Young’s (mm) (mm) (mm) (MPa) modulus (GPa) 1 2.0 19.0 50.00 154.31 8.93 2 1.7 19.0 50.00 186.09 10.83 3 1.9 19.2 50.00 165.02 8.74 4 1.8 19.1 50.00 165.41 9.57 5 1.8 19.2 50.00 185.73 9.53 Average 171.31 9.52 Standard deviation 14.05 0.82 Table 3 : Tensile test results of composite laminate along axial direction.