Issue 49

S.A.G. Pereira et alii, Frattura ed Integrità Strutturale, 49(2019) 412-428; DOI: 10.3221/IGF-ESIS.49.40

and φ 0

Figure 10 : a) Relation between K I

/ K II

for the MTS criterion, b) Experimental data.



0 

sin





cot

(19)

0 



3cos

1

I II     K   K

2 tan



1



M

(20)

e



  

sen 2  

2

2









1

1

(21)











M

tan

tan tan

 

e









cos

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 

3

3

  

  

  

  

0 3 sin sin K 







K

4  Ic K

3cos

cos

(22)

I

II

2

2

2

2

421