Issue 49

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

   

   

2 II K K K K K K    2 2 8 9 I I

2 II

3

 

0 

arcos

(23)

2 II

I

SED

2





2

2 K K a m a m a            11 12 2 1 I Ic m

(24)

22

2





2 K K a m a m a            11 12 2 1 II Ic

(25)

22



  



  





a a a

1 cos

cos

 



11







 

2sin 2cos 

 

1

(26)

12

  1 1 cos          





1 cos 3cos 1   

 



22



 

3 4 ,    

for plane stress for plane deformation

 

(27)

3 ,    1    



  

Circle

2 2 II Ic K K K   2 I

(28)

Ellipse

2

2

I K               II Ic IIc K K K

1 

(29)

Figure 12 : a) Mixed mode fracture according to the MTS criterion, SED, ellipse and circle, b) Experimental points.

422