Issue 33

V. Shlyannikov et alii, Frattura ed Integrità Strutturale, 33 (2015) 335-344; DOI: 10.3221/IGF-ESIS.33.37 341 plastic properties of the material in the interpretation of the characteristics of the material resistance to crack propagation. The data shown in Fig. 9 confirm this suggestion in more details for several other crack fronts. Recall that the front of the number four in the Fig. 9 corresponds to the second stage of crack propagation when it becomes completely through- thickness and intersects the hollow cylinder wall. Figure 6 : I n -factor and stress triaxiality parameter distributions along crack front under different loading conditions. Figure 7 : I n -factor distributions along crack front under different loading conditions (1-initial, 2-3- intermediate , 4-final crack front). Figure 8 : Elastic and plastic stress intensity factor behavior for initial crack front under tension.