Issue 49

S.A.G. Pereira et alii, Frattura ed Integrità Strutturale, 49(2019) 412-428; DOI: 10.3221/IGF-ESIS.49.40 421 Figure 10 : a) Relation between K I / K II and φ 0 for the MTS criterion, b) Experimental data. 0 0 sin cot 3cos 1       (19) 1 2 tan I e II K M K          (20)   1 1 2 sen 2 2 tan tan tan cos e M                   (21) Figure 11 : a) Kink angle function of the pre-crack angle and mixed mode, b) Experimental points. The mixed mode criteria used to compare with experimental data are presented in the Eqns. (22) to (28), Fig. 12. MTS 0 0 0 0 3 3 3cos cos 3 sin sin 4  2 2 2 2 I II Ic K K K                     (22)