Samples (No.)

P (Pressure)

(kN)

∆L (mm)

Area (mm)2

Strain %

Stress (MPa)

M (Youngs Modulas)

(GPa or kN/mm2)

11 G

161

1.9

2054.616

0.0185

78

4.22

17 G

96

2.1

1923.446

0.0208

49.9

2.39

18 G

59

1.4

1884.785

0.0139

31.3

2.25