Issue 44

S. de Barros et alii, Frattura ed Integrità Strutturale, 44 (2018) 151-160; DOI: 10.3221/IGF-ESIS.44.12

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 (mm)

Gauge Length

Max. tension

Young’s

(mm)

(mm) 50.00 50.00 50.00 50.00 50.00

(MPa) 355.45 345.66 350.34 336.70 350.57 347.74

modulus (GPa)

1 2 3 4 5

2.0 2.0 2.0 2.0 2.0

19.0 19.1 19.1 19.2 19.2

17.11 16.43 16.66 16.72 16.57 16.60

Average

Standard deviation 0.25 Table 2 : Tensile test results of composite laminate along circumferential direction. 7.08

Young’s

Specimen

Thickness

Width (mm)

Gauge Length

Max. tension

modulus (GPa)

(mm)

(mm) 50.00 50.00 50.00 50.00 50.00

(MPa) 154.31 186.09 165.02 165.41 185.73

8.93

1 2 3 4 5

2.0 1.7 1.9 1.8 1.8

19.0 19.0 19.2 19.1 19.2

10.83

8.74 9.57 9.53 9.52 0.82

Average

171.31

Standard deviation

14.05

Table 3 : Tensile test results of composite laminate along axial direction.

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