13th International Conference on Fracture June 16–21, 2013, Beijing, China -6- Figure 4. δ(σnet max) and δ(σnet = 0) as a function of the degree of crystallinity χ (%) 3.2.3. Fracture energies Ei and Et Figure 5. Fracture energies plotted as a function of the degree of crystallinity χ (%) Fig.5 displays the fracture energies Ei and Et in a semi-logarithmic scale versus χ. For Ei, the trend was the same as that of σnet max and δ(σnet max), whereas the jump of Et between 20% and 30% 0 2 4 6 8 10 10 20 30 40 50 60 χ (%) 0 0.2 0.4 0.6 0.8 1 δ(σnet max) (mm) δ(σnet = 0) (mm) 0.01 0.1 1 10 100 10 20 30 40 50 60 χ (%) Energy (kJ/m2) Ei Et
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