Issue 43

D. Gentile, Frattura ed Integrità Strutturale, 43 (2018) 155-170; DOI: 10.3221/IGF-ESIS.43.12 168 Fig. 19 shows the G II values (max min and average) calculated at maximum load. It is possible to note that the material L1 and T1000-3 give a shorter dispersion data. For these materials bridging occurs less time that the others materials. Figure 16 . Summary of strain energy release rates for tested materials. 2 3 4 5 6 7 8 9 10 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 G I =0.52533-0.04285*t G I [kJ/m 2 ] Thickness [mm] Figure 17. Average strain energy release vs specimen thickness. Figure 18 . Bridging in a DCB specimen.