Issue 28

D. Gentile et alii, Frattura ed Integrità Strutturale, 28 (2014) 42-50; DOI: 10.3221/IGF-ESIS.28.05 47 -1 -0.5 0 0.5 1 0 1 2 3 4 5 x 10 -3 Dimensionless angle COD/2 (mm) model thickness 5mm thickness 2mm Figure 5 : COD distribution for specimen in the canonical configuration, (  =0°), crack length 2  50°. -1 -0.5 0 0.5 1 0 0.002 0.004 0.006 0.008 0.01 Dimensionless angle COD/2 (mm) model thickness 2mm thickness 5mm thickness 3.4mm Figure 6 : CODdistribution for pipewith different thickness: crack length 2  90°. -1 -0.5 0 0.5 1 0 1 2 3 4 x 10 -3 Dimensionless angle COD/2 (mm) model  50  60  50  30 Figure 7 : t=2mm crack length 2  (  0°) and (  0°).